Linux 予約デバイス (4.x+ バージョン)

以下は Linux デバイスリストです。予約デバイス番号の公式レジストリであり Linux オペレーティングシステムの /dev ディレクトリノードです。

lanana.org に存在していたこのドキュメントの LaTeX 版はメンテナンスされていません。メインライン Linux カーネルのバージョンがマスタードキュメントです。アップデートはパッチとしてカーネルメンテナに送ってください (Documentation/process/submitting-patches.rst ドキュメントを参照)。文字・ブロックデバイスに関係しているメンテナが誰なのかは MAINTAINERS ファイルの "CHAR and MISC DRIVERS" と "BLOCK LAYER" セクションを見てください。

このドキュメントは Filesystem Hierarchy Standard (FHS) に組み込まれています。FHS は http://www.pathname.com/fhs/ で確認できます。

Allocations marked (68k/Amiga) apply to Linux/68k on the Amiga platform only. Allocations marked (68k/Atari) apply to Linux/68k on the Atari platform only.

This document is in the public domain. The authors requests, however, that semantically altered versions are not distributed without permission of the authors, assuming the authors can be contacted without an unreasonable effort.

注意

DEVICE DRIVERS AUTHORS PLEASE READ THIS

Linux now has extensive support for dynamic allocation of device numbering and can use sysfs and udev (systemd) to handle the naming needs. There are still some exceptions in the serial and boot device area. Before asking for a device number make sure you actually need one.

To have a major number allocated, or a minor number in situations where that applies (e.g. busmice), please submit a patch and send to the authors as indicated above.

Keep the description of the device in the same format as this list. The reason for this is that it is the only way we have found to ensure we have all the requisite information to publish your device and avoid conflicts.

Finally, sometimes we have to play "namespace police." Please don't be offended. We often get submissions for /dev names that would be bound to cause conflicts down the road. We are trying to avoid getting in a situation where we would have to suffer an incompatible forward change. Therefore, please consult with us before you make your device names and numbers in any way public, at least to the point where it would be at all difficult to get them changed.

Your cooperation is appreciated.

   0            Unnamed devices (e.g. non-device mounts)
                  0 = reserved as null device number
                See block major 144, 145, 146 for expansion areas.

   1 char       Memory devices
                  1 = /dev/mem          Physical memory access
                  2 = /dev/kmem         Kernel virtual memory access
                  3 = /dev/null         Null device
                  4 = /dev/port         I/O port access
                  5 = /dev/zero         Null byte source
                  6 = /dev/core         OBSOLETE - replaced by /proc/kcore
                  7 = /dev/full         Returns ENOSPC on write
                  8 = /dev/random       Nondeterministic random number gen.
                  9 = /dev/urandom      Faster, less secure random number gen.
                 10 = /dev/aio          Asynchronous I/O notification interface
                 11 = /dev/kmsg         Writes to this come out as printk's, reads
                                        export the buffered printk records.
                 12 = /dev/oldmem       OBSOLETE - replaced by /proc/vmcore

   1 block      RAM disk
                  0 = /dev/ram0         First RAM disk
                  1 = /dev/ram1         Second RAM disk
                    ...
                250 = /dev/initrd       Initial RAM disk

                Older kernels had /dev/ramdisk (1, 1) here.
                /dev/initrd refers to a RAM disk which was preloaded
                by the boot loader; newer kernels use /dev/ram0 for
                the initrd.

   2 char       Pseudo-TTY masters
                  0 = /dev/ptyp0        First PTY master
                  1 = /dev/ptyp1        Second PTY master
                    ...
                255 = /dev/ptyef        256th PTY master

                Pseudo-tty's are named as follows:
                * Masters are "pty", slaves are "tty";
                * the fourth letter is one of pqrstuvwxyzabcde indicating
                  the 1st through 16th series of 16 pseudo-ttys each, and
                * the fifth letter is one of 0123456789abcdef indicating
                  the position within the series.

                These are the old-style (BSD) PTY devices; Unix98
                devices are on major 128 and above and use the PTY
                master multiplex (/dev/ptmx) to acquire a PTY on
                demand.

   2 block      Floppy disks
                  0 = /dev/fd0          Controller 0, drive 0, autodetect
                  1 = /dev/fd1          Controller 0, drive 1, autodetect
                  2 = /dev/fd2          Controller 0, drive 2, autodetect
                  3 = /dev/fd3          Controller 0, drive 3, autodetect
                128 = /dev/fd4          Controller 1, drive 0, autodetect
                129 = /dev/fd5          Controller 1, drive 1, autodetect
                130 = /dev/fd6          Controller 1, drive 2, autodetect
                131 = /dev/fd7          Controller 1, drive 3, autodetect

                To specify format, add to the autodetect device number:
                  0 = /dev/fd?          Autodetect format
                  4 = /dev/fd?d360      5.25"  360K in a 360K  drive(1)
                 20 = /dev/fd?h360      5.25"  360K in a 1200K drive(1)
                 48 = /dev/fd?h410      5.25"  410K in a 1200K drive
                 64 = /dev/fd?h420      5.25"  420K in a 1200K drive
                 24 = /dev/fd?h720      5.25"  720K in a 1200K drive
                 80 = /dev/fd?h880      5.25"  880K in a 1200K drive(1)
                  8 = /dev/fd?h1200     5.25" 1200K in a 1200K drive(1)
                 40 = /dev/fd?h1440     5.25" 1440K in a 1200K drive(1)
                 56 = /dev/fd?h1476     5.25" 1476K in a 1200K drive
                 72 = /dev/fd?h1494     5.25" 1494K in a 1200K drive
                 92 = /dev/fd?h1600     5.25" 1600K in a 1200K drive(1)

                 12 = /dev/fd?u360      3.5"   360K Double Density(2)
                 16 = /dev/fd?u720      3.5"   720K Double Density(1)
                120 = /dev/fd?u800      3.5"   800K Double Density(2)
                 52 = /dev/fd?u820      3.5"   820K Double Density
                 68 = /dev/fd?u830      3.5"   830K Double Density
                 84 = /dev/fd?u1040     3.5"  1040K Double Density(1)
                 88 = /dev/fd?u1120     3.5"  1120K Double Density(1)
                 28 = /dev/fd?u1440     3.5"  1440K High Density(1)
                124 = /dev/fd?u1600     3.5"  1600K High Density(1)
                 44 = /dev/fd?u1680     3.5"  1680K High Density(3)
                 60 = /dev/fd?u1722     3.5"  1722K High Density
                 76 = /dev/fd?u1743     3.5"  1743K High Density
                 96 = /dev/fd?u1760     3.5"  1760K High Density
                116 = /dev/fd?u1840     3.5"  1840K High Density(3)
                100 = /dev/fd?u1920     3.5"  1920K High Density(1)
                 32 = /dev/fd?u2880     3.5"  2880K Extra Density(1)
                104 = /dev/fd?u3200     3.5"  3200K Extra Density
                108 = /dev/fd?u3520     3.5"  3520K Extra Density
                112 = /dev/fd?u3840     3.5"  3840K Extra Density(1)

                 36 = /dev/fd?CompaQ    Compaq 2880K drive; obsolete?

                (1) Autodetectable format
                (2) Autodetectable format in a Double Density (720K) drive only
                (3) Autodetectable format in a High Density (1440K) drive only

                NOTE: The letter in the device name (d, q, h or u)
                signifies the type of drive: 5.25" Double Density (d),
                5.25" Quad Density (q), 5.25" High Density (h) or 3.5"
                (any model, u).  The use of the capital letters D, H
                and E for the 3.5" models have been deprecated, since
                the drive type is insignificant for these devices.

   3 char       Pseudo-TTY slaves
                  0 = /dev/ttyp0        First PTY slave
                  1 = /dev/ttyp1        Second PTY slave
                    ...
                255 = /dev/ttyef        256th PTY slave

                These are the old-style (BSD) PTY devices; Unix98
                devices are on major 136 and above.

   3 block      First MFM, RLL and IDE hard disk/CD-ROM interface
                  0 = /dev/hda          Master: whole disk (or CD-ROM)
                 64 = /dev/hdb          Slave: whole disk (or CD-ROM)

                For partitions, add to the whole disk device number:
                  0 = /dev/hd?          Whole disk
                  1 = /dev/hd?1         First partition
                  2 = /dev/hd?2         Second partition
                    ...
                 63 = /dev/hd?63        63rd partition

                For Linux/i386, partitions 1-4 are the primary
                partitions, and 5 and above are logical partitions.
                Other versions of Linux use partitioning schemes
                appropriate to their respective architectures.

   4 char       TTY devices
                  0 = /dev/tty0         Current virtual console

                  1 = /dev/tty1         First virtual console
                    ...
                 63 = /dev/tty63        63rd virtual console
                 64 = /dev/ttyS0        First UART serial port
                    ...
                255 = /dev/ttyS191      192nd UART serial port

                UART serial ports refer to 8250/16450/16550 series devices.

                Older versions of the Linux kernel used this major
                number for BSD PTY devices.  As of Linux 2.1.115, this
                is no longer supported.  Use major numbers 2 and 3.

   4 block      Aliases for dynamically allocated major devices to be used
                when its not possible to create the real device nodes
                because the root filesystem is mounted read-only.

                   0 = /dev/root

   5 char       Alternate TTY devices
                  0 = /dev/tty          Current TTY device
                  1 = /dev/console      System console
                  2 = /dev/ptmx         PTY master multiplex
                  3 = /dev/ttyprintk    User messages via printk TTY device
                 64 = /dev/cua0         Callout device for ttyS0
                    ...
                255 = /dev/cua191       Callout device for ttyS191

                (5,1) is /dev/console starting with Linux 2.1.71.  See
                the section on terminal devices for more information
                on /dev/console.

   6 char       Parallel printer devices
                  0 = /dev/lp0          Parallel printer on parport0
                  1 = /dev/lp1          Parallel printer on parport1
                    ...

                Current Linux kernels no longer have a fixed mapping
                between parallel ports and I/O addresses.  Instead,
                they are redirected through the parport multiplex layer.

   7 char       Virtual console capture devices
                  0 = /dev/vcs          Current vc text (glyph) contents
                  1 = /dev/vcs1         tty1 text (glyph) contents
                    ...
                 63 = /dev/vcs63        tty63 text (glyph) contents
                 64 = /dev/vcsu         Current vc text (unicode) contents
                65 = /dev/vcsu1         tty1 text (unicode) contents
                    ...
                127 = /dev/vcsu63       tty63 text (unicode) contents
                128 = /dev/vcsa         Current vc text/attribute (glyph) contents
                129 = /dev/vcsa1        tty1 text/attribute (glyph) contents
                    ...
                191 = /dev/vcsa63       tty63 text/attribute (glyph) contents

                NOTE: These devices permit both read and write access.

   7 block      Loopback devices
                  0 = /dev/loop0        First loop device
                  1 = /dev/loop1        Second loop device
                    ...

                The loop devices are used to mount filesystems not
                associated with block devices.  The binding to the
                loop devices is handled by mount(8) or losetup(8).

   8 block      SCSI disk devices (0-15)
                  0 = /dev/sda          First SCSI disk whole disk
                 16 = /dev/sdb          Second SCSI disk whole disk
                 32 = /dev/sdc          Third SCSI disk whole disk
                    ...
                240 = /dev/sdp          Sixteenth SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

   9 char       SCSI tape devices
                  0 = /dev/st0          First SCSI tape, mode 0
                  1 = /dev/st1          Second SCSI tape, mode 0
                    ...
                 32 = /dev/st0l         First SCSI tape, mode 1
                 33 = /dev/st1l         Second SCSI tape, mode 1
                    ...
                 64 = /dev/st0m         First SCSI tape, mode 2
                 65 = /dev/st1m         Second SCSI tape, mode 2
                    ...
                 96 = /dev/st0a         First SCSI tape, mode 3
                 97 = /dev/st1a         Second SCSI tape, mode 3
                      ...
                128 = /dev/nst0         First SCSI tape, mode 0, no rewind
                129 = /dev/nst1         Second SCSI tape, mode 0, no rewind
                    ...
                160 = /dev/nst0l        First SCSI tape, mode 1, no rewind
                161 = /dev/nst1l        Second SCSI tape, mode 1, no rewind
                    ...
                192 = /dev/nst0m        First SCSI tape, mode 2, no rewind
                193 = /dev/nst1m        Second SCSI tape, mode 2, no rewind
                    ...
                224 = /dev/nst0a        First SCSI tape, mode 3, no rewind
                225 = /dev/nst1a        Second SCSI tape, mode 3, no rewind
                    ...

                "No rewind" refers to the omission of the default
                automatic rewind on device close.  The MTREW or MTOFFL
                ioctl()'s can be used to rewind the tape regardless of
                the device used to access it.

   9 block      Metadisk (RAID) devices
                  0 = /dev/md0          First metadisk group
                  1 = /dev/md1          Second metadisk group
                    ...

                The metadisk driver is used to span a
                filesystem across multiple physical disks.

  10 char       Non-serial mice, misc features
                  0 = /dev/logibm       Logitech bus mouse
                  1 = /dev/psaux        PS/2-style mouse port
                  2 = /dev/inportbm     Microsoft Inport bus mouse
                  3 = /dev/atibm        ATI XL bus mouse
                  4 = /dev/jbm          J-mouse
                  4 = /dev/amigamouse   Amiga mouse (68k/Amiga)
                  5 = /dev/atarimouse   Atari mouse
                  6 = /dev/sunmouse     Sun mouse
                  7 = /dev/amigamouse1  Second Amiga mouse
                  8 = /dev/smouse       Simple serial mouse driver
                  9 = /dev/pc110pad     IBM PC-110 digitizer pad
                 10 = /dev/adbmouse     Apple Desktop Bus mouse
                 11 = /dev/vrtpanel     Vr41xx embedded touch panel
                 13 = /dev/vpcmouse     Connectix Virtual PC Mouse
                 14 = /dev/touchscreen/ucb1x00  UCB 1x00 touchscreen
                 15 = /dev/touchscreen/mk712    MK712 touchscreen
                128 = /dev/beep         Fancy beep device
                129 =
                130 = /dev/watchdog     Watchdog timer port
                131 = /dev/temperature  Machine internal temperature
                132 = /dev/hwtrap       Hardware fault trap
                133 = /dev/exttrp       External device trap
                134 = /dev/apm_bios     Advanced Power Management BIOS
                135 = /dev/rtc          Real Time Clock
                137 = /dev/vhci         Bluetooth virtual HCI driver
                139 = /dev/openprom     SPARC OpenBoot PROM
                140 = /dev/relay8       Berkshire Products Octal relay card
                141 = /dev/relay16      Berkshire Products ISO-16 relay card
                142 =
                143 = /dev/pciconf      PCI configuration space
                144 = /dev/nvram        Non-volatile configuration RAM
                145 = /dev/hfmodem      Soundcard shortwave modem control
                146 = /dev/graphics     Linux/SGI graphics device
                147 = /dev/opengl       Linux/SGI OpenGL pipe
                148 = /dev/gfx          Linux/SGI graphics effects device
                149 = /dev/input/mouse  Linux/SGI Irix emulation mouse
                150 = /dev/input/keyboard Linux/SGI Irix emulation keyboard
                151 = /dev/led          Front panel LEDs
                152 = /dev/kpoll        Kernel Poll Driver
                153 = /dev/mergemem     Memory merge device
                154 = /dev/pmu          Macintosh PowerBook power manager
                155 = /dev/isictl       MultiTech ISICom serial control
                156 = /dev/lcd          Front panel LCD display
                157 = /dev/ac           Applicom Intl Profibus card
                158 = /dev/nwbutton     Netwinder external button
                159 = /dev/nwdebug      Netwinder debug interface
                160 = /dev/nwflash      Netwinder flash memory
                161 = /dev/userdma      User-space DMA access
                162 = /dev/smbus        System Management Bus
                163 = /dev/lik          Logitech Internet Keyboard
                164 = /dev/ipmo         Intel Intelligent Platform Management
                165 = /dev/vmmon        VMware virtual machine monitor
                166 = /dev/i2o/ctl      I2O configuration manager
                167 = /dev/specialix_sxctl Specialix serial control
                168 = /dev/tcldrv       Technology Concepts serial control
                169 = /dev/specialix_rioctl Specialix RIO serial control
                170 = /dev/thinkpad/thinkpad    IBM Thinkpad devices
                171 = /dev/srripc       QNX4 API IPC manager
                172 = /dev/usemaclone   Semaphore clone device
                173 = /dev/ipmikcs      Intelligent Platform Management
                174 = /dev/uctrl        SPARCbook 3 microcontroller
                175 = /dev/agpgart      AGP Graphics Address Remapping Table
                176 = /dev/gtrsc        Gorgy Timing radio clock
                177 = /dev/cbm          Serial CBM bus
                178 = /dev/jsflash      JavaStation OS flash SIMM
                179 = /dev/xsvc         High-speed shared-mem/semaphore service
                180 = /dev/vrbuttons    Vr41xx button input device
                181 = /dev/toshiba      Toshiba laptop SMM support
                182 = /dev/perfctr      Performance-monitoring counters
                183 = /dev/hwrng        Generic random number generator
                184 = /dev/cpu/microcode CPU microcode update interface
                186 = /dev/atomicps     Atomic shapshot of process state data
                187 = /dev/irnet        IrNET device
                188 = /dev/smbusbios    SMBus BIOS
                189 = /dev/ussp_ctl     User space serial port control
                190 = /dev/crash        Mission Critical Linux crash dump facility
                191 = /dev/pcl181       <information missing>
                192 = /dev/nas_xbus     NAS xbus LCD/buttons access
                193 = /dev/d7s          SPARC 7-segment display
                194 = /dev/zkshim       Zero-Knowledge network shim control
                195 = /dev/elographics/e2201    Elographics touchscreen E271-2201
                196 = /dev/vfio/vfio    VFIO userspace driver interface
                197 = /dev/pxa3xx-gcu   PXA3xx graphics controller unit driver
                198 = /dev/sexec        Signed executable interface
                199 = /dev/scanners/cuecat :CueCat barcode scanner
                200 = /dev/net/tun      TAP/TUN network device
                201 = /dev/button/gulpb Transmeta GULP-B buttons
                202 = /dev/emd/ctl      Enhanced Metadisk RAID (EMD) control
                203 = /dev/cuse         Cuse (character device in user-space)
                204 = /dev/video/em8300         EM8300 DVD decoder control
                205 = /dev/video/em8300_mv      EM8300 DVD decoder video
                206 = /dev/video/em8300_ma      EM8300 DVD decoder audio
                207 = /dev/video/em8300_sp      EM8300 DVD decoder subpicture
                208 = /dev/compaq/cpqphpc       Compaq PCI Hot Plug Controller
                209 = /dev/compaq/cpqrid        Compaq Remote Insight Driver
                210 = /dev/impi/bt      IMPI coprocessor block transfer
                211 = /dev/impi/smic    IMPI coprocessor stream interface
                212 = /dev/watchdogs/0  First watchdog device
                213 = /dev/watchdogs/1  Second watchdog device
                214 = /dev/watchdogs/2  Third watchdog device
                215 = /dev/watchdogs/3  Fourth watchdog device
                216 = /dev/fujitsu/apanel       Fujitsu/Siemens application panel
                217 = /dev/ni/natmotn           National Instruments Motion
                218 = /dev/kchuid       Inter-process chuid control
                219 = /dev/modems/mwave MWave modem firmware upload
                220 = /dev/mptctl       Message passing technology (MPT) control
                221 = /dev/mvista/hssdsi        Montavista PICMG hot swap system driver
                222 = /dev/mvista/hasi          Montavista PICMG high availability
                223 = /dev/input/uinput         User level driver support for input
                224 = /dev/tpm          TCPA TPM driver
                225 = /dev/pps          Pulse Per Second driver
                226 = /dev/systrace     Systrace device
                227 = /dev/mcelog       X86_64 Machine Check Exception driver
                228 = /dev/hpet         HPET driver
                229 = /dev/fuse         Fuse (virtual filesystem in user-space)
                230 = /dev/midishare    MidiShare driver
                231 = /dev/snapshot     System memory snapshot device
                232 = /dev/kvm          Kernel-based virtual machine (hardware virtualization extensions)
                233 = /dev/kmview       View-OS A process with a view
                234 = /dev/btrfs-control        Btrfs control device
                235 = /dev/autofs       Autofs control device
                236 = /dev/mapper/control       Device-Mapper control device
                237 = /dev/loop-control Loopback control device
                238 = /dev/vhost-net    Host kernel accelerator for virtio net
                239 = /dev/uhid         User-space I/O driver support for HID subsystem
                240 = /dev/userio       Serio driver testing device
                241 = /dev/vhost-vsock  Host kernel driver for virtio vsock

                242-254                 Reserved for local use
                255                     Reserved for MISC_DYNAMIC_MINOR

  11 char       Raw keyboard device     (Linux/SPARC only)
                  0 = /dev/kbd          Raw keyboard device

  11 char       Serial Mux device       (Linux/PA-RISC only)
                  0 = /dev/ttyB0        First mux port
                  1 = /dev/ttyB1        Second mux port
                    ...

  11 block      SCSI CD-ROM devices
                  0 = /dev/scd0         First SCSI CD-ROM
                  1 = /dev/scd1         Second SCSI CD-ROM
                    ...

                The prefix /dev/sr (instead of /dev/scd) has been deprecated.

  12 char       QIC-02 tape
                  2 = /dev/ntpqic11     QIC-11, no rewind-on-close
                  3 = /dev/tpqic11      QIC-11, rewind-on-close
                  4 = /dev/ntpqic24     QIC-24, no rewind-on-close
                  5 = /dev/tpqic24      QIC-24, rewind-on-close
                  6 = /dev/ntpqic120    QIC-120, no rewind-on-close
                  7 = /dev/tpqic120     QIC-120, rewind-on-close
                  8 = /dev/ntpqic150    QIC-150, no rewind-on-close
                  9 = /dev/tpqic150     QIC-150, rewind-on-close

                The device names specified are proposed -- if there
                are "standard" names for these devices, please let me know.

  12 block

  13 char       Input core
                  0 = /dev/input/js0    First joystick
                  1 = /dev/input/js1    Second joystick
                    ...
                 32 = /dev/input/mouse0 First mouse
                 33 = /dev/input/mouse1 Second mouse
                    ...
                 63 = /dev/input/mice   Unified mouse
                 64 = /dev/input/event0 First event queue
                 65 = /dev/input/event1 Second event queue
                    ...

                Each device type has 5 bits (32 minors).

  13 block      Previously used for the XT disk (/dev/xdN)
                Deleted in kernel v3.9.

  14 char       Open Sound System (OSS)
                  0 = /dev/mixer        Mixer control
                  1 = /dev/sequencer    Audio sequencer
                  2 = /dev/midi00       First MIDI port
                  3 = /dev/dsp          Digital audio
                  4 = /dev/audio        Sun-compatible digital audio
                  6 =
                  7 = /dev/audioctl     SPARC audio control device
                  8 = /dev/sequencer2   Sequencer -- alternate device
                 16 = /dev/mixer1       Second soundcard mixer control
                 17 = /dev/patmgr0      Sequencer patch manager
                 18 = /dev/midi01       Second MIDI port
                 19 = /dev/dsp1         Second soundcard digital audio
                 20 = /dev/audio1       Second soundcard Sun digital audio
                 33 = /dev/patmgr1      Sequencer patch manager
                 34 = /dev/midi02       Third MIDI port
                 50 = /dev/midi03       Fourth MIDI port

  14 block

  15 char       Joystick
                  0 = /dev/js0          First analog joystick
                  1 = /dev/js1          Second analog joystick
                    ...
                128 = /dev/djs0         First digital joystick
                129 = /dev/djs1         Second digital joystick
                    ...
  15 block      Sony CDU-31A/CDU-33A CD-ROM
                  0 = /dev/sonycd       Sony CDU-31a CD-ROM

  16 char       Non-SCSI scanners
                  0 = /dev/gs4500       Genius 4500 handheld scanner

  16 block      GoldStar CD-ROM
                  0 = /dev/gscd         GoldStar CD-ROM

  17 char       OBSOLETE (was Chase serial card)
                  0 = /dev/ttyH0        First Chase port
                  1 = /dev/ttyH1        Second Chase port
                    ...
  17 block      Optics Storage CD-ROM
                  0 = /dev/optcd        Optics Storage CD-ROM

  18 char       OBSOLETE (was Chase serial card - alternate devices)
                  0 = /dev/cuh0         Callout device for ttyH0
                  1 = /dev/cuh1         Callout device for ttyH1
                    ...
  18 block      Sanyo CD-ROM
                  0 = /dev/sjcd         Sanyo CD-ROM

  19 char       Cyclades serial card
                  0 = /dev/ttyC0        First Cyclades port
                    ...
                 31 = /dev/ttyC31       32nd Cyclades port

  19 block      "Double" compressed disk
                  0 = /dev/double0      First compressed disk
                    ...
                  7 = /dev/double7      Eighth compressed disk
                128 = /dev/cdouble0     Mirror of first compressed disk
                    ...
                135 = /dev/cdouble7     Mirror of eighth compressed disk

                See the Double documentation for the meaning of the
                mirror devices.

  20 char       Cyclades serial card - alternate devices
                  0 = /dev/cub0         Callout device for ttyC0
                    ...
                 31 = /dev/cub31        Callout device for ttyC31

  20 block      Hitachi CD-ROM (under development)
                  0 = /dev/hitcd        Hitachi CD-ROM

  21 char       Generic SCSI access
                  0 = /dev/sg0          First generic SCSI device
                  1 = /dev/sg1          Second generic SCSI device
                    ...

                Most distributions name these /dev/sga, /dev/sgb...;
                this sets an unnecessary limit of 26 SCSI devices in
                the system and is counter to standard Linux
                device-naming practice.

  21 block      Acorn MFM hard drive interface
                  0 = /dev/mfma         First MFM drive whole disk
                 64 = /dev/mfmb         Second MFM drive whole disk

                This device is used on the ARM-based Acorn RiscPC.
                Partitions are handled the same way as for IDE disks
                (see major number 3).

  22 char       Digiboard serial card
                  0 = /dev/ttyD0        First Digiboard port
                  1 = /dev/ttyD1        Second Digiboard port
                    ...
  22 block      Second IDE hard disk/CD-ROM interface
                  0 = /dev/hdc          Master: whole disk (or CD-ROM)
                 64 = /dev/hdd          Slave: whole disk (or CD-ROM)

                Partitions are handled the same way as for the first
                interface (see major number 3).

  23 char       Digiboard serial card - alternate devices
                  0 = /dev/cud0         Callout device for ttyD0
                  1 = /dev/cud1         Callout device for ttyD1
                      ...
  23 block      Mitsumi proprietary CD-ROM
                  0 = /dev/mcd          Mitsumi CD-ROM

  24 char       Stallion serial card
                  0 = /dev/ttyE0        Stallion port 0 card 0
                  1 = /dev/ttyE1        Stallion port 1 card 0
                    ...
                 64 = /dev/ttyE64       Stallion port 0 card 1
                 65 = /dev/ttyE65       Stallion port 1 card 1
                      ...
                128 = /dev/ttyE128      Stallion port 0 card 2
                129 = /dev/ttyE129      Stallion port 1 card 2
                    ...
                192 = /dev/ttyE192      Stallion port 0 card 3
                193 = /dev/ttyE193      Stallion port 1 card 3
                    ...
  24 block      Sony CDU-535 CD-ROM
                  0 = /dev/cdu535       Sony CDU-535 CD-ROM

  25 char       Stallion serial card - alternate devices
                  0 = /dev/cue0         Callout device for ttyE0
                  1 = /dev/cue1         Callout device for ttyE1
                    ...
                 64 = /dev/cue64        Callout device for ttyE64
                 65 = /dev/cue65        Callout device for ttyE65
                    ...
                128 = /dev/cue128       Callout device for ttyE128
                129 = /dev/cue129       Callout device for ttyE129
                    ...
                192 = /dev/cue192       Callout device for ttyE192
                193 = /dev/cue193       Callout device for ttyE193
                      ...
  25 block      First Matsushita (Panasonic/SoundBlaster) CD-ROM
                  0 = /dev/sbpcd0       Panasonic CD-ROM controller 0 unit 0
                  1 = /dev/sbpcd1       Panasonic CD-ROM controller 0 unit 1
                  2 = /dev/sbpcd2       Panasonic CD-ROM controller 0 unit 2
                  3 = /dev/sbpcd3       Panasonic CD-ROM controller 0 unit 3

  26 char

  26 block      Second Matsushita (Panasonic/SoundBlaster) CD-ROM
                  0 = /dev/sbpcd4       Panasonic CD-ROM controller 1 unit 0
                  1 = /dev/sbpcd5       Panasonic CD-ROM controller 1 unit 1
                  2 = /dev/sbpcd6       Panasonic CD-ROM controller 1 unit 2
                  3 = /dev/sbpcd7       Panasonic CD-ROM controller 1 unit 3

  27 char       QIC-117 tape
                  0 = /dev/qft0         Unit 0, rewind-on-close
                  1 = /dev/qft1         Unit 1, rewind-on-close
                  2 = /dev/qft2         Unit 2, rewind-on-close
                  3 = /dev/qft3         Unit 3, rewind-on-close
                  4 = /dev/nqft0        Unit 0, no rewind-on-close
                  5 = /dev/nqft1        Unit 1, no rewind-on-close
                  6 = /dev/nqft2        Unit 2, no rewind-on-close
                  7 = /dev/nqft3        Unit 3, no rewind-on-close
                 16 = /dev/zqft0        Unit 0, rewind-on-close, compression
                 17 = /dev/zqft1        Unit 1, rewind-on-close, compression
                 18 = /dev/zqft2        Unit 2, rewind-on-close, compression
                 19 = /dev/zqft3        Unit 3, rewind-on-close, compression
                 20 = /dev/nzqft0       Unit 0, no rewind-on-close, compression
                 21 = /dev/nzqft1       Unit 1, no rewind-on-close, compression
                 22 = /dev/nzqft2       Unit 2, no rewind-on-close, compression
                 23 = /dev/nzqft3       Unit 3, no rewind-on-close, compression
                 32 = /dev/rawqft0      Unit 0, rewind-on-close, no file marks
                 33 = /dev/rawqft1      Unit 1, rewind-on-close, no file marks
                 34 = /dev/rawqft2      Unit 2, rewind-on-close, no file marks
                 35 = /dev/rawqft3      Unit 3, rewind-on-close, no file marks
                 36 = /dev/nrawqft0     Unit 0, no rewind-on-close, no file marks
                 37 = /dev/nrawqft1     Unit 1, no rewind-on-close, no file marks
                 38 = /dev/nrawqft2     Unit 2, no rewind-on-close, no file marks
                 39 = /dev/nrawqft3     Unit 3, no rewind-on-close, no file marks

  27 block      Third Matsushita (Panasonic/SoundBlaster) CD-ROM
                  0 = /dev/sbpcd8       Panasonic CD-ROM controller 2 unit 0
                  1 = /dev/sbpcd9       Panasonic CD-ROM controller 2 unit 1
                  2 = /dev/sbpcd10      Panasonic CD-ROM controller 2 unit 2
                  3 = /dev/sbpcd11      Panasonic CD-ROM controller 2 unit 3

  28 char       Stallion serial card - card programming
                  0 = /dev/staliomem0   First Stallion card I/O memory
                  1 = /dev/staliomem1   Second Stallion card I/O memory
                  2 = /dev/staliomem2   Third Stallion card I/O memory
                  3 = /dev/staliomem3   Fourth Stallion card I/O memory

  28 char       Atari SLM ACSI laser printer (68k/Atari)
                  0 = /dev/slm0         First SLM laser printer
                  1 = /dev/slm1         Second SLM laser printer
                    ...
  28 block      Fourth Matsushita (Panasonic/SoundBlaster) CD-ROM
                  0 = /dev/sbpcd12      Panasonic CD-ROM controller 3 unit 0
                  1 = /dev/sbpcd13      Panasonic CD-ROM controller 3 unit 1
                  2 = /dev/sbpcd14      Panasonic CD-ROM controller 3 unit 2
                  3 = /dev/sbpcd15      Panasonic CD-ROM controller 3 unit 3

  28 block      ACSI disk (68k/Atari)
                  0 = /dev/ada          First ACSI disk whole disk
                 16 = /dev/adb          Second ACSI disk whole disk
                 32 = /dev/adc          Third ACSI disk whole disk
                    ...
                240 = /dev/adp          16th ACSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15, like SCSI.

  29 char       Universal frame buffer
                  0 = /dev/fb0          First frame buffer
                  1 = /dev/fb1          Second frame buffer
                    ...
                 31 = /dev/fb31         32nd frame buffer

  29 block      Aztech/Orchid/Okano/Wearnes CD-ROM
                  0 = /dev/aztcd        Aztech CD-ROM

  30 char       iBCS-2 compatibility devices
                  0 = /dev/socksys      Socket access
                  1 = /dev/spx          SVR3 local X interface
                 32 = /dev/inet/ip      Network access
                 33 = /dev/inet/icmp
                 34 = /dev/inet/ggp
                 35 = /dev/inet/ipip
                 36 = /dev/inet/tcp
                 37 = /dev/inet/egp
                 38 = /dev/inet/pup
                 39 = /dev/inet/udp
                 40 = /dev/inet/idp
                 41 = /dev/inet/rawip

                Additionally, iBCS-2 requires the following links:

                /dev/ip -> /dev/inet/ip
                /dev/icmp -> /dev/inet/icmp
                /dev/ggp -> /dev/inet/ggp
                /dev/ipip -> /dev/inet/ipip
                /dev/tcp -> /dev/inet/tcp
                /dev/egp -> /dev/inet/egp
                /dev/pup -> /dev/inet/pup
                /dev/udp -> /dev/inet/udp
                /dev/idp -> /dev/inet/idp
                /dev/rawip -> /dev/inet/rawip
                /dev/inet/arp -> /dev/inet/udp
                /dev/inet/rip -> /dev/inet/udp
                /dev/nfsd -> /dev/socksys
                /dev/X0R -> /dev/null (? apparently not required ?)

  30 block      Philips LMS CM-205 CD-ROM
                  0 = /dev/cm205cd      Philips LMS CM-205 CD-ROM

                /dev/lmscd is an older name for this device.  This
                driver does not work with the CM-205MS CD-ROM.

  31 char       MPU-401 MIDI
                  0 = /dev/mpu401data   MPU-401 data port
                  1 = /dev/mpu401stat   MPU-401 status port

  31 block      ROM/flash memory card
                  0 = /dev/rom0         First ROM card (rw)
                      ...
                  7 = /dev/rom7         Eighth ROM card (rw)
                  8 = /dev/rrom0        First ROM card (ro)
                    ...
                 15 = /dev/rrom7        Eighth ROM card (ro)
                 16 = /dev/flash0       First flash memory card (rw)
                    ...
                 23 = /dev/flash7       Eighth flash memory card (rw)
                 24 = /dev/rflash0      First flash memory card (ro)
                    ...
                 31 = /dev/rflash7      Eighth flash memory card (ro)

                The read-write (rw) devices support back-caching
                written data in RAM, as well as writing to flash RAM
                devices.  The read-only devices (ro) support reading
                only.

  32 char       Specialix serial card
                  0 = /dev/ttyX0        First Specialix port
                  1 = /dev/ttyX1        Second Specialix port
                    ...
  32 block      Philips LMS CM-206 CD-ROM
                  0 = /dev/cm206cd      Philips LMS CM-206 CD-ROM

  33 char       Specialix serial card - alternate devices
                  0 = /dev/cux0         Callout device for ttyX0
                  1 = /dev/cux1         Callout device for ttyX1
                    ...
  33 block      Third IDE hard disk/CD-ROM interface
                  0 = /dev/hde          Master: whole disk (or CD-ROM)
                 64 = /dev/hdf          Slave: whole disk (or CD-ROM)

                Partitions are handled the same way as for the first
                interface (see major number 3).

  34 char       Z8530 HDLC driver
                  0 = /dev/scc0         First Z8530, first port
                  1 = /dev/scc1         First Z8530, second port
                  2 = /dev/scc2         Second Z8530, first port
                  3 = /dev/scc3         Second Z8530, second port
                    ...

                In a previous version these devices were named
                /dev/sc1 for /dev/scc0, /dev/sc2 for /dev/scc1, and so
                on.

  34 block      Fourth IDE hard disk/CD-ROM interface
                  0 = /dev/hdg          Master: whole disk (or CD-ROM)
                 64 = /dev/hdh          Slave: whole disk (or CD-ROM)

                Partitions are handled the same way as for the first
                interface (see major number 3).

  35 char       tclmidi MIDI driver
                  0 = /dev/midi0        First MIDI port, kernel timed
                  1 = /dev/midi1        Second MIDI port, kernel timed
                  2 = /dev/midi2        Third MIDI port, kernel timed
                  3 = /dev/midi3        Fourth MIDI port, kernel timed
                 64 = /dev/rmidi0       First MIDI port, untimed
                 65 = /dev/rmidi1       Second MIDI port, untimed
                 66 = /dev/rmidi2       Third MIDI port, untimed
                 67 = /dev/rmidi3       Fourth MIDI port, untimed
                128 = /dev/smpte0       First MIDI port, SMPTE timed
                129 = /dev/smpte1       Second MIDI port, SMPTE timed
                130 = /dev/smpte2       Third MIDI port, SMPTE timed
                131 = /dev/smpte3       Fourth MIDI port, SMPTE timed

  35 block      Slow memory ramdisk
                  0 = /dev/slram        Slow memory ramdisk

  36 char       Netlink support
                  0 = /dev/route        Routing, device updates, kernel to user
                  1 = /dev/skip         enSKIP security cache control
                  3 = /dev/fwmonitor    Firewall packet copies
                 16 = /dev/tap0         First Ethertap device
                    ...
                 31 = /dev/tap15        16th Ethertap device

  36 block      OBSOLETE (was MCA ESDI hard disk)

  37 char       IDE tape
                  0 = /dev/ht0          First IDE tape
                  1 = /dev/ht1          Second IDE tape
                    ...
                128 = /dev/nht0         First IDE tape, no rewind-on-close
                129 = /dev/nht1         Second IDE tape, no rewind-on-close
                    ...

                Currently, only one IDE tape drive is supported.

  37 block      Zorro II ramdisk
                  0 = /dev/z2ram        Zorro II ramdisk

  38 char       Myricom PCI Myrinet board
                  0 = /dev/mlanai0      First Myrinet board
                  1 = /dev/mlanai1      Second Myrinet board
                    ...

                This device is used for status query, board control
                and "user level packet I/O."  This board is also
                accessible as a standard networking "eth" device.

  38 block      OBSOLETE (was Linux/AP+)

  39 char       ML-16P experimental I/O board
                  0 = /dev/ml16pa-a0    First card, first analog channel
                  1 = /dev/ml16pa-a1    First card, second analog channel
                    ...
                 15 = /dev/ml16pa-a15   First card, 16th analog channel
                 16 = /dev/ml16pa-d     First card, digital lines
                 17 = /dev/ml16pa-c0    First card, first counter/timer
                 18 = /dev/ml16pa-c1    First card, second counter/timer
                 19 = /dev/ml16pa-c2    First card, third counter/timer
                 32 = /dev/ml16pb-a0    Second card, first analog channel
                 33 = /dev/ml16pb-a1    Second card, second analog channel
                    ...
                 47 = /dev/ml16pb-a15   Second card, 16th analog channel
                 48 = /dev/ml16pb-d     Second card, digital lines
                 49 = /dev/ml16pb-c0    Second card, first counter/timer
                 50 = /dev/ml16pb-c1    Second card, second counter/timer
                 51 = /dev/ml16pb-c2    Second card, third counter/timer
                      ...
  39 block

  40 char

  40 block

  41 char       Yet Another Micro Monitor
                  0 = /dev/yamm         Yet Another Micro Monitor

  41 block

  42 char       Demo/sample use

  42 block      Demo/sample use

                This number is intended for use in sample code, as
                well as a general "example" device number.  It
                should never be used for a device driver that is being
                distributed; either obtain an official number or use
                the local/experimental range.  The sudden addition or
                removal of a driver with this number should not cause
                ill effects to the system (bugs excepted.)

                IN PARTICULAR, ANY DISTRIBUTION WHICH CONTAINS A
                DEVICE DRIVER USING MAJOR NUMBER 42 IS NONCOMPLIANT.

  43 char       isdn4linux virtual modem
                  0 = /dev/ttyI0        First virtual modem
                    ...
                 63 = /dev/ttyI63       64th virtual modem

  43 block      Network block devices
                  0 = /dev/nb0          First network block device
                  1 = /dev/nb1          Second network block device
                    ...

                Network Block Device is somehow similar to loopback
                devices: If you read from it, it sends packet across
                network asking server for data. If you write to it, it
                sends packet telling server to write. It could be used
                to mounting filesystems over the net, swapping over
                the net, implementing block device in userland etc.

  44 char       isdn4linux virtual modem - alternate devices
                  0 = /dev/cui0         Callout device for ttyI0
                    ...
                 63 = /dev/cui63        Callout device for ttyI63

  44 block      Flash Translation Layer (FTL) filesystems
                  0 = /dev/ftla         FTL on first Memory Technology Device
                 16 = /dev/ftlb         FTL on second Memory Technology Device
                 32 = /dev/ftlc         FTL on third Memory Technology Device
                    ...
                240 = /dev/ftlp         FTL on 16th Memory Technology Device

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the partition
                limit is 15 rather than 63 per disk (same as SCSI.)

  45 char       isdn4linux ISDN BRI driver
                  0 = /dev/isdn0        First virtual B channel raw data
                    ...
                 63 = /dev/isdn63       64th virtual B channel raw data
                 64 = /dev/isdnctrl0    First channel control/debug
                    ...
                127 = /dev/isdnctrl63   64th channel control/debug

                128 = /dev/ippp0        First SyncPPP device
                    ...
                191 = /dev/ippp63       64th SyncPPP device

                255 = /dev/isdninfo     ISDN monitor interface

  45 block      Parallel port IDE disk devices
                  0 = /dev/pda          First parallel port IDE disk
                 16 = /dev/pdb          Second parallel port IDE disk
                 32 = /dev/pdc          Third parallel port IDE disk
                 48 = /dev/pdd          Fourth parallel port IDE disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the partition
                limit is 15 rather than 63 per disk.

  46 char       Comtrol Rocketport serial card
                  0 = /dev/ttyR0        First Rocketport port
                  1 = /dev/ttyR1        Second Rocketport port
                    ...
  46 block      Parallel port ATAPI CD-ROM devices
                  0 = /dev/pcd0         First parallel port ATAPI CD-ROM
                  1 = /dev/pcd1         Second parallel port ATAPI CD-ROM
                  2 = /dev/pcd2         Third parallel port ATAPI CD-ROM
                  3 = /dev/pcd3         Fourth parallel port ATAPI CD-ROM

  47 char       Comtrol Rocketport serial card - alternate devices
                  0 = /dev/cur0         Callout device for ttyR0
                  1 = /dev/cur1         Callout device for ttyR1
                    ...
  47 block      Parallel port ATAPI disk devices
                  0 = /dev/pf0          First parallel port ATAPI disk
                  1 = /dev/pf1          Second parallel port ATAPI disk
                  2 = /dev/pf2          Third parallel port ATAPI disk
                  3 = /dev/pf3          Fourth parallel port ATAPI disk

                This driver is intended for floppy disks and similar
                devices and hence does not support partitioning.

  48 char       SDL RISCom serial card
                  0 = /dev/ttyL0        First RISCom port
                  1 = /dev/ttyL1        Second RISCom port
                    ...
  48 block      Mylex DAC960 PCI RAID controller; first controller
                  0 = /dev/rd/c0d0      First disk, whole disk
                  8 = /dev/rd/c0d1      Second disk, whole disk
                    ...
                248 = /dev/rd/c0d31     32nd disk, whole disk

                For partitions add:
                  0 = /dev/rd/c?d?      Whole disk
                  1 = /dev/rd/c?d?p1    First partition
                    ...
                  7 = /dev/rd/c?d?p7    Seventh partition

  49 char       SDL RISCom serial card - alternate devices
                  0 = /dev/cul0         Callout device for ttyL0
                  1 = /dev/cul1         Callout device for ttyL1
                    ...
  49 block      Mylex DAC960 PCI RAID controller; second controller
                  0 = /dev/rd/c1d0      First disk, whole disk
                  8 = /dev/rd/c1d1      Second disk, whole disk
                    ...
                248 = /dev/rd/c1d31     32nd disk, whole disk

                Partitions are handled as for major 48.

  50 char       Reserved for GLINT

  50 block      Mylex DAC960 PCI RAID controller; third controller
                  0 = /dev/rd/c2d0      First disk, whole disk
                  8 = /dev/rd/c2d1      Second disk, whole disk
                    ...
                248 = /dev/rd/c2d31     32nd disk, whole disk

  51 char       Baycom radio modem OR Radio Tech BIM-XXX-RS232 radio modem
                  0 = /dev/bc0          First Baycom radio modem
                  1 = /dev/bc1          Second Baycom radio modem
                    ...
  51 block      Mylex DAC960 PCI RAID controller; fourth controller
                  0 = /dev/rd/c3d0      First disk, whole disk
                  8 = /dev/rd/c3d1      Second disk, whole disk
                    ...
                248 = /dev/rd/c3d31     32nd disk, whole disk

                Partitions are handled as for major 48.

  52 char       Spellcaster DataComm/BRI ISDN card
                  0 = /dev/dcbri0       First DataComm card
                  1 = /dev/dcbri1       Second DataComm card
                  2 = /dev/dcbri2       Third DataComm card
                  3 = /dev/dcbri3       Fourth DataComm card

  52 block      Mylex DAC960 PCI RAID controller; fifth controller
                  0 = /dev/rd/c4d0      First disk, whole disk
                  8 = /dev/rd/c4d1      Second disk, whole disk
                    ...
                248 = /dev/rd/c4d31     32nd disk, whole disk

                Partitions are handled as for major 48.

  53 char       BDM interface for remote debugging MC683xx microcontrollers
                  0 = /dev/pd_bdm0      PD BDM interface on lp0
                  1 = /dev/pd_bdm1      PD BDM interface on lp1
                  2 = /dev/pd_bdm2      PD BDM interface on lp2
                  4 = /dev/icd_bdm0     ICD BDM interface on lp0
                  5 = /dev/icd_bdm1     ICD BDM interface on lp1
                  6 = /dev/icd_bdm2     ICD BDM interface on lp2

                This device is used for the interfacing to the MC683xx
                microcontrollers via Background Debug Mode by use of a
                Parallel Port interface. PD is the Motorola Public
                Domain Interface and ICD is the commercial interface
                by P&E.

  53 block      Mylex DAC960 PCI RAID controller; sixth controller
                  0 = /dev/rd/c5d0      First disk, whole disk
                  8 = /dev/rd/c5d1      Second disk, whole disk
                    ...
                248 = /dev/rd/c5d31     32nd disk, whole disk

                Partitions are handled as for major 48.

  54 char       Electrocardiognosis Holter serial card
                  0 = /dev/holter0      First Holter port
                  1 = /dev/holter1      Second Holter port
                  2 = /dev/holter2      Third Holter port

                A custom serial card used by Electrocardiognosis SRL
                <mseritan@ottonel.pub.ro> to transfer data from Holter
                24-hour heart monitoring equipment.

  54 block      Mylex DAC960 PCI RAID controller; seventh controller
                  0 = /dev/rd/c6d0      First disk, whole disk
                  8 = /dev/rd/c6d1      Second disk, whole disk
                    ...
                248 = /dev/rd/c6d31     32nd disk, whole disk

                Partitions are handled as for major 48.

  55 char       DSP56001 digital signal processor
                  0 = /dev/dsp56k       First DSP56001

  55 block      Mylex DAC960 PCI RAID controller; eighth controller
                  0 = /dev/rd/c7d0      First disk, whole disk
                  8 = /dev/rd/c7d1      Second disk, whole disk
                    ...
                248 = /dev/rd/c7d31     32nd disk, whole disk

                Partitions are handled as for major 48.

  56 char       Apple Desktop Bus
                  0 = /dev/adb          ADB bus control

                Additional devices will be added to this number, all
                starting with /dev/adb.

  56 block      Fifth IDE hard disk/CD-ROM interface
                  0 = /dev/hdi          Master: whole disk (or CD-ROM)
                 64 = /dev/hdj          Slave: whole disk (or CD-ROM)

                Partitions are handled the same way as for the first
                interface (see major number 3).

  57 char       Hayes ESP serial card
                  0 = /dev/ttyP0        First ESP port
                  1 = /dev/ttyP1        Second ESP port
                    ...

  57 block      Sixth IDE hard disk/CD-ROM interface
                  0 = /dev/hdk          Master: whole disk (or CD-ROM)
                 64 = /dev/hdl          Slave: whole disk (or CD-ROM)

                Partitions are handled the same way as for the first
                interface (see major number 3).

  58 char       Hayes ESP serial card - alternate devices
                  0 = /dev/cup0         Callout device for ttyP0
                  1 = /dev/cup1         Callout device for ttyP1
                    ...

  58 block      Reserved for logical volume manager

  59 char       sf firewall package
                  0 = /dev/firewall     Communication with sf kernel module

  59 block      Generic PDA filesystem device
                  0 = /dev/pda0         First PDA device
                  1 = /dev/pda1         Second PDA device
                    ...

                The pda devices are used to mount filesystems on
                remote pda's (basically slow handheld machines with
                proprietary OS's and limited memory and storage
                running small fs translation drivers) through serial /
                IRDA / parallel links.

                NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc

  60-63 char    LOCAL/EXPERIMENTAL USE

  60-63 block   LOCAL/EXPERIMENTAL USE
                Allocated for local/experimental use.  For devices not
                assigned official numbers, these ranges should be
                used in order to avoid conflicting with future assignments.

  64 char       ENskip kernel encryption package
                  0 = /dev/enskip       Communication with ENskip kernel module

  64 block      Scramdisk/DriveCrypt encrypted devices
                  0 = /dev/scramdisk/master    Master node for ioctls
                  1 = /dev/scramdisk/1         First encrypted device
                  2 = /dev/scramdisk/2         Second encrypted device
                  ...
                255 = /dev/scramdisk/255       255th encrypted device

                The filename of the encrypted container and the passwords
                are sent via ioctls (using the sdmount tool) to the master
                node which then activates them via one of the
                /dev/scramdisk/x nodes for loop mounting (all handled
                through the sdmount tool).

                Requested by: andy@scramdisklinux.org

  65 char       Sundance "plink" Transputer boards (obsolete, unused)
                  0 = /dev/plink0       First plink device
                  1 = /dev/plink1       Second plink device
                  2 = /dev/plink2       Third plink device
                  3 = /dev/plink3       Fourth plink device
                 64 = /dev/rplink0      First plink device, raw
                 65 = /dev/rplink1      Second plink device, raw
                 66 = /dev/rplink2      Third plink device, raw
                 67 = /dev/rplink3      Fourth plink device, raw
                128 = /dev/plink0d      First plink device, debug
                129 = /dev/plink1d      Second plink device, debug
                130 = /dev/plink2d      Third plink device, debug
                131 = /dev/plink3d      Fourth plink device, debug
                192 = /dev/rplink0d     First plink device, raw, debug
                193 = /dev/rplink1d     Second plink device, raw, debug
                194 = /dev/rplink2d     Third plink device, raw, debug
                195 = /dev/rplink3d     Fourth plink device, raw, debug

                This is a commercial driver; contact James Howes
                <jth@prosig.demon.co.uk> for information.

  65 block      SCSI disk devices (16-31)
                  0 = /dev/sdq          17th SCSI disk whole disk
                 16 = /dev/sdr          18th SCSI disk whole disk
                 32 = /dev/sds          19th SCSI disk whole disk
                    ...
                240 = /dev/sdaf         32nd SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  66 char       YARC PowerPC PCI coprocessor card
                  0 = /dev/yppcpci0     First YARC card
                  1 = /dev/yppcpci1     Second YARC card
                    ...

  66 block      SCSI disk devices (32-47)
                  0 = /dev/sdag         33th SCSI disk whole disk
                 16 = /dev/sdah         34th SCSI disk whole disk
                 32 = /dev/sdai         35th SCSI disk whole disk
                    ...
                240 = /dev/sdav         48nd SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  67 char       Coda network file system
                  0 = /dev/cfs0         Coda cache manager

                See http://www.coda.cs.cmu.edu for information about Coda.

  67 block      SCSI disk devices (48-63)
                  0 = /dev/sdaw         49th SCSI disk whole disk
                 16 = /dev/sdax         50th SCSI disk whole disk
                 32 = /dev/sday         51st SCSI disk whole disk
                    ...
                240 = /dev/sdbl         64th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  68 char       CAPI 2.0 interface
                  0 = /dev/capi20       Control device
                  1 = /dev/capi20.00    First CAPI 2.0 application
                  2 = /dev/capi20.01    Second CAPI 2.0 application
                    ...
                 20 = /dev/capi20.19    19th CAPI 2.0 application

                ISDN CAPI 2.0 driver for use with CAPI 2.0
                applications; currently supports the AVM B1 card.

  68 block      SCSI disk devices (64-79)
                  0 = /dev/sdbm         65th SCSI disk whole disk
                 16 = /dev/sdbn         66th SCSI disk whole disk
                 32 = /dev/sdbo         67th SCSI disk whole disk
                    ...
                240 = /dev/sdcb         80th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  69 char       MA16 numeric accelerator card
                  0 = /dev/ma16         Board memory access

  69 block      SCSI disk devices (80-95)
                  0 = /dev/sdcc         81st SCSI disk whole disk
                 16 = /dev/sdcd         82nd SCSI disk whole disk
                 32 = /dev/sdce         83th SCSI disk whole disk
                    ...
                240 = /dev/sdcr         96th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  70 char       SpellCaster Protocol Services Interface
                  0 = /dev/apscfg       Configuration interface
                  1 = /dev/apsauth      Authentication interface
                  2 = /dev/apslog       Logging interface
                  3 = /dev/apsdbg       Debugging interface
                 64 = /dev/apsisdn      ISDN command interface
                 65 = /dev/apsasync     Async command interface
                128 = /dev/apsmon       Monitor interface

  70 block      SCSI disk devices (96-111)
                  0 = /dev/sdcs         97th SCSI disk whole disk
                 16 = /dev/sdct         98th SCSI disk whole disk
                 32 = /dev/sdcu         99th SCSI disk whole disk
                    ...
                240 = /dev/sddh         112nd SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  71 char       Computone IntelliPort II serial card
                  0 = /dev/ttyF0        IntelliPort II board 0, port 0
                  1 = /dev/ttyF1        IntelliPort II board 0, port 1
                    ...
                 63 = /dev/ttyF63       IntelliPort II board 0, port 63
                 64 = /dev/ttyF64       IntelliPort II board 1, port 0
                 65 = /dev/ttyF65       IntelliPort II board 1, port 1
                    ...
                127 = /dev/ttyF127      IntelliPort II board 1, port 63
                128 = /dev/ttyF128      IntelliPort II board 2, port 0
                129 = /dev/ttyF129      IntelliPort II board 2, port 1
                    ...
                191 = /dev/ttyF191      IntelliPort II board 2, port 63
                192 = /dev/ttyF192      IntelliPort II board 3, port 0
                193 = /dev/ttyF193      IntelliPort II board 3, port 1
                    ...
                255 = /dev/ttyF255      IntelliPort II board 3, port 63

  71 block      SCSI disk devices (112-127)
                  0 = /dev/sddi         113th SCSI disk whole disk
                 16 = /dev/sddj         114th SCSI disk whole disk
                 32 = /dev/sddk         115th SCSI disk whole disk
                    ...
                240 = /dev/sddx         128th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  72 char       Computone IntelliPort II serial card - alternate devices
                  0 = /dev/cuf0         Callout device for ttyF0
                  1 = /dev/cuf1         Callout device for ttyF1
                    ...
                 63 = /dev/cuf63        Callout device for ttyF63
                 64 = /dev/cuf64        Callout device for ttyF64
                 65 = /dev/cuf65        Callout device for ttyF65
                    ...
                127 = /dev/cuf127       Callout device for ttyF127
                128 = /dev/cuf128       Callout device for ttyF128
                129 = /dev/cuf129       Callout device for ttyF129
                    ...
                191 = /dev/cuf191       Callout device for ttyF191
                192 = /dev/cuf192       Callout device for ttyF192
                193 = /dev/cuf193       Callout device for ttyF193
                    ...
                255 = /dev/cuf255       Callout device for ttyF255

  72 block      Compaq Intelligent Drive Array, first controller
                  0 = /dev/ida/c0d0     First logical drive whole disk
                 16 = /dev/ida/c0d1     Second logical drive whole disk
                    ...
                240 = /dev/ida/c0d15    16th logical drive whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

  73 char       Computone IntelliPort II serial card - control devices
                  0 = /dev/ip2ipl0      Loadware device for board 0
                  1 = /dev/ip2stat0     Status device for board 0
                  4 = /dev/ip2ipl1      Loadware device for board 1
                  5 = /dev/ip2stat1     Status device for board 1
                  8 = /dev/ip2ipl2      Loadware device for board 2
                  9 = /dev/ip2stat2     Status device for board 2
                 12 = /dev/ip2ipl3      Loadware device for board 3
                 13 = /dev/ip2stat3     Status device for board 3

  73 block      Compaq Intelligent Drive Array, second controller
                  0 = /dev/ida/c1d0     First logical drive whole disk
                 16 = /dev/ida/c1d1     Second logical drive whole disk
                    ...
                240 = /dev/ida/c1d15    16th logical drive whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

  74 char       SCI bridge
                  0 = /dev/SCI/0        SCI device 0
                  1 = /dev/SCI/1        SCI device 1
                    ...

                Currently for Dolphin Interconnect Solutions' PCI-SCI
                bridge.

  74 block      Compaq Intelligent Drive Array, third controller
                  0 = /dev/ida/c2d0     First logical drive whole disk
                 16 = /dev/ida/c2d1     Second logical drive whole disk
                    ...
                240 = /dev/ida/c2d15    16th logical drive whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

  75 char       Specialix IO8+ serial card
                  0 = /dev/ttyW0        First IO8+ port, first card
                  1 = /dev/ttyW1        Second IO8+ port, first card
                    ...
                  8 = /dev/ttyW8        First IO8+ port, second card
                    ...

  75 block      Compaq Intelligent Drive Array, fourth controller
                  0 = /dev/ida/c3d0     First logical drive whole disk
                 16 = /dev/ida/c3d1     Second logical drive whole disk
                    ...
                240 = /dev/ida/c3d15    16th logical drive whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

  76 char       Specialix IO8+ serial card - alternate devices
                  0 = /dev/cuw0         Callout device for ttyW0
                  1 = /dev/cuw1         Callout device for ttyW1
                    ...
                  8 = /dev/cuw8         Callout device for ttyW8
                    ...

  76 block      Compaq Intelligent Drive Array, fifth controller
                  0 = /dev/ida/c4d0     First logical drive whole disk
                 16 = /dev/ida/c4d1     Second logical drive whole disk
                    ...
                240 = /dev/ida/c4d15    16th logical drive whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.


  77 char       ComScire Quantum Noise Generator
                  0 = /dev/qng          ComScire Quantum Noise Generator

  77 block      Compaq Intelligent Drive Array, sixth controller
                  0 = /dev/ida/c5d0     First logical drive whole disk
                 16 = /dev/ida/c5d1     Second logical drive whole disk
                    ...
                240 = /dev/ida/c5d15    16th logical drive whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

  78 char       PAM Software's multimodem boards
                  0 = /dev/ttyM0        First PAM modem
                  1 = /dev/ttyM1        Second PAM modem
                    ...

  78 block      Compaq Intelligent Drive Array, seventh controller
                  0 = /dev/ida/c6d0     First logical drive whole disk
                 16 = /dev/ida/c6d1     Second logical drive whole disk
                    ...
                240 = /dev/ida/c6d15    16th logical drive whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

  79 char       PAM Software's multimodem boards - alternate devices
                  0 = /dev/cum0         Callout device for ttyM0
                  1 = /dev/cum1         Callout device for ttyM1
                    ...

  79 block      Compaq Intelligent Drive Array, eighth controller
                  0 = /dev/ida/c7d0     First logical drive whole disk
                 16 = /dev/ida/c7d1     Second logical drive whole disk
                    ...
                240 = /dev/ida/c715     16th logical drive whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

  80 char       Photometrics AT200 CCD camera
                  0 = /dev/at200        Photometrics AT200 CCD camera

  80 block      I2O hard disk
                  0 = /dev/i2o/hda      First I2O hard disk, whole disk
                 16 = /dev/i2o/hdb      Second I2O hard disk, whole disk
                    ...
                240 = /dev/i2o/hdp      16th I2O hard disk, whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  81 char       video4linux
                  0 = /dev/video0       Video capture/overlay device
                    ...
                 63 = /dev/video63      Video capture/overlay device
                 64 = /dev/radio0       Radio device
                    ...
                127 = /dev/radio63      Radio device
                128 = /dev/swradio0     Software Defined Radio device
                    ...
                191 = /dev/swradio63    Software Defined Radio device
                224 = /dev/vbi0         Vertical blank interrupt
                    ...
                255 = /dev/vbi31        Vertical blank interrupt

                Minor numbers are allocated dynamically unless
                CONFIG_VIDEO_FIXED_MINOR_RANGES (default n)
                configuration option is set.

  81 block      I2O hard disk
                  0 = /dev/i2o/hdq      17th I2O hard disk, whole disk
                 16 = /dev/i2o/hdr      18th I2O hard disk, whole disk
                    ...
                240 = /dev/i2o/hdaf     32nd I2O hard disk, whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  82 char       WiNRADiO communications receiver card
                  0 = /dev/winradio0    First WiNRADiO card
                  1 = /dev/winradio1    Second WiNRADiO card
                    ...

                The driver and documentation may be obtained from
                http://www.winradio.com/

  82 block      I2O hard disk
                  0 = /dev/i2o/hdag     33rd I2O hard disk, whole disk
                 16 = /dev/i2o/hdah     34th I2O hard disk, whole disk
                    ...
                240 = /dev/i2o/hdav     48th I2O hard disk, whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  83 char       Matrox mga_vid video driver
                 0 = /dev/mga_vid0      1st video card
                 1 = /dev/mga_vid1      2nd video card
                 2 = /dev/mga_vid2      3rd video card
                  ...
                15 = /dev/mga_vid15     16th video card

  83 block      I2O hard disk
                  0 = /dev/i2o/hdaw     49th I2O hard disk, whole disk
                 16 = /dev/i2o/hdax     50th I2O hard disk, whole disk
                    ...
                240 = /dev/i2o/hdbl     64th I2O hard disk, whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  84 char       Ikon 1011[57] Versatec Greensheet Interface
                  0 = /dev/ihcp0        First Greensheet port
                  1 = /dev/ihcp1        Second Greensheet port

  84 block      I2O hard disk
                  0 = /dev/i2o/hdbm     65th I2O hard disk, whole disk
                 16 = /dev/i2o/hdbn     66th I2O hard disk, whole disk
                    ...
                240 = /dev/i2o/hdcb     80th I2O hard disk, whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  85 char       Linux/SGI shared memory input queue
                  0 = /dev/shmiq        Master shared input queue
                  1 = /dev/qcntl0       First device pushed
                  2 = /dev/qcntl1       Second device pushed
                    ...

  85 block      I2O hard disk
                  0 = /dev/i2o/hdcc     81st I2O hard disk, whole disk
                 16 = /dev/i2o/hdcd     82nd I2O hard disk, whole disk
                    ...
                240 = /dev/i2o/hdcr     96th I2O hard disk, whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  86 char       SCSI media changer
                  0 = /dev/sch0         First SCSI media changer
                  1 = /dev/sch1         Second SCSI media changer
                    ...

  86 block      I2O hard disk
                  0 = /dev/i2o/hdcs     97th I2O hard disk, whole disk
                 16 = /dev/i2o/hdct     98th I2O hard disk, whole disk
                    ...
                240 = /dev/i2o/hddh     112th I2O hard disk, whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  87 char       Sony Control-A1 stereo control bus
                  0 = /dev/controla0    First device on chain
                  1 = /dev/controla1    Second device on chain
                    ...

  87 block      I2O hard disk
                  0 = /dev/i2o/hddi     113rd I2O hard disk, whole disk
                 16 = /dev/i2o/hddj     114th I2O hard disk, whole disk
                    ...
                240 = /dev/i2o/hddx     128th I2O hard disk, whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  88 char       COMX synchronous serial card
                  0 = /dev/comx0        COMX channel 0
                  1 = /dev/comx1        COMX channel 1
                    ...

  88 block      Seventh IDE hard disk/CD-ROM interface
                  0 = /dev/hdm          Master: whole disk (or CD-ROM)
                 64 = /dev/hdn          Slave: whole disk (or CD-ROM)

                Partitions are handled the same way as for the first
                interface (see major number 3).

  89 char       I2C bus interface
                  0 = /dev/i2c-0        First I2C adapter
                  1 = /dev/i2c-1        Second I2C adapter
                    ...

  89 block      Eighth IDE hard disk/CD-ROM interface
                  0 = /dev/hdo          Master: whole disk (or CD-ROM)
                 64 = /dev/hdp          Slave: whole disk (or CD-ROM)

                Partitions are handled the same way as for the first
                interface (see major number 3).

  90 char       Memory Technology Device (RAM, ROM, Flash)
                  0 = /dev/mtd0         First MTD (rw)
                  1 = /dev/mtdr0        First MTD (ro)
                    ...
                 30 = /dev/mtd15        16th MTD (rw)
                 31 = /dev/mtdr15       16th MTD (ro)

  90 block      Ninth IDE hard disk/CD-ROM interface
                  0 = /dev/hdq          Master: whole disk (or CD-ROM)
                 64 = /dev/hdr          Slave: whole disk (or CD-ROM)

                Partitions are handled the same way as for the first
                interface (see major number 3).

  91 char       CAN-Bus devices
                  0 = /dev/can0         First CAN-Bus controller
                  1 = /dev/can1         Second CAN-Bus controller
                    ...

  91 block      Tenth IDE hard disk/CD-ROM interface
                  0 = /dev/hds          Master: whole disk (or CD-ROM)
                 64 = /dev/hdt          Slave: whole disk (or CD-ROM)

                Partitions are handled the same way as for the first
                interface (see major number 3).

  92 char       Reserved for ith Kommunikationstechnik MIC ISDN card

  92 block      PPDD encrypted disk driver
                  0 = /dev/ppdd0        First encrypted disk
                  1 = /dev/ppdd1        Second encrypted disk
                    ...

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

  93 char

  93 block      NAND Flash Translation Layer filesystem
                  0 = /dev/nftla        First NFTL layer
                 16 = /dev/nftlb        Second NFTL layer
                    ...
                240 = /dev/nftlp        16th NTFL layer

  94 char

  94 block      IBM S/390 DASD block storage
                  0 = /dev/dasda First DASD device, major
                  1 = /dev/dasda1 First DASD device, block 1
                  2 = /dev/dasda2 First DASD device, block 2
                  3 = /dev/dasda3 First DASD device, block 3
                  4 = /dev/dasdb Second DASD device, major
                  5 = /dev/dasdb1 Second DASD device, block 1
                  6 = /dev/dasdb2 Second DASD device, block 2
                  7 = /dev/dasdb3 Second DASD device, block 3
                    ...

  95 char       IP filter
                  0 = /dev/ipl          Filter control device/log file
                  1 = /dev/ipnat        NAT control device/log file
                  2 = /dev/ipstate      State information log file
                  3 = /dev/ipauth       Authentication control device/log file
                    ...

  96 char       Parallel port ATAPI tape devices
                  0 = /dev/pt0          First parallel port ATAPI tape
                  1 = /dev/pt1          Second parallel port ATAPI tape
                    ...
                128 = /dev/npt0         First p.p. ATAPI tape, no rewind
                129 = /dev/npt1         Second p.p. ATAPI tape, no rewind
                    ...

  96 block      Inverse NAND Flash Translation Layer
                  0 = /dev/inftla First INFTL layer
                 16 = /dev/inftlb Second INFTL layer
                    ...
                240 = /dev/inftlp       16th INTFL layer

  97 char       Parallel port generic ATAPI interface
                  0 = /dev/pg0          First parallel port ATAPI device
                  1 = /dev/pg1          Second parallel port ATAPI device
                  2 = /dev/pg2          Third parallel port ATAPI device
                  3 = /dev/pg3          Fourth parallel port ATAPI device

                These devices support the same API as the generic SCSI
                devices.

  98 char       Control and Measurement Device (comedi)
                  0 = /dev/comedi0      First comedi device
                  1 = /dev/comedi1      Second comedi device
                    ...

                See http://stm.lbl.gov/comedi.

  98 block      User-mode virtual block device
                  0 = /dev/ubda         First user-mode block device
                 16 = /dev/udbb         Second user-mode block device
                    ...

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

                This device is used by the user-mode virtual kernel port.

  99 char       Raw parallel ports
                  0 = /dev/parport0     First parallel port
                  1 = /dev/parport1     Second parallel port
                    ...

  99 block      JavaStation flash disk
                  0 = /dev/jsfd         JavaStation flash disk

 100 char       Telephony for Linux
                  0 = /dev/phone0       First telephony device
                  1 = /dev/phone1       Second telephony device
                    ...

 101 char       Motorola DSP 56xxx board
                  0 = /dev/mdspstat     Status information
                  1 = /dev/mdsp1        First DSP board I/O controls
                    ...
                 16 = /dev/mdsp16       16th DSP board I/O controls

 101 block      AMI HyperDisk RAID controller
                  0 = /dev/amiraid/ar0  First array whole disk
                 16 = /dev/amiraid/ar1  Second array whole disk
                    ...
                240 = /dev/amiraid/ar15 16th array whole disk

                For each device, partitions are added as:
                  0 = /dev/amiraid/ar?    Whole disk
                  1 = /dev/amiraid/ar?p1  First partition
                  2 = /dev/amiraid/ar?p2  Second partition
                    ...
                 15 = /dev/amiraid/ar?p15 15th partition

 102 char

 102 block      Compressed block device
                  0 = /dev/cbd/a        First compressed block device, whole device
                 16 = /dev/cbd/b        Second compressed block device, whole device
                    ...
                240 = /dev/cbd/p        16th compressed block device, whole device

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 103 char       Arla network file system
                  0 = /dev/nnpfs0       First NNPFS device
                  1 = /dev/nnpfs1       Second NNPFS device

                Arla is a free clone of the Andrew File System, AFS.
                The NNPFS device gives user mode filesystem
                implementations a kernel presence for caching and easy
                mounting.  For more information about the project,
                write to <arla-drinkers@stacken.kth.se> or see
                http://www.stacken.kth.se/project/arla/

 103 block      Audit device
                  0 = /dev/audit        Audit device

 104 char       Flash BIOS support

 104 block      Compaq Next Generation Drive Array, first controller
                  0 = /dev/cciss/c0d0   First logical drive, whole disk
                 16 = /dev/cciss/c0d1   Second logical drive, whole disk
                    ...
                240 = /dev/cciss/c0d15  16th logical drive, whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

 105 char       Comtrol VS-1000 serial controller
                  0 = /dev/ttyV0        First VS-1000 port
                  1 = /dev/ttyV1        Second VS-1000 port
                    ...

 105 block      Compaq Next Generation Drive Array, second controller
                  0 = /dev/cciss/c1d0   First logical drive, whole disk
                 16 = /dev/cciss/c1d1   Second logical drive, whole disk
                    ...
                240 = /dev/cciss/c1d15  16th logical drive, whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

 106 char       Comtrol VS-1000 serial controller - alternate devices
                  0 = /dev/cuv0         First VS-1000 port
                  1 = /dev/cuv1         Second VS-1000 port
                    ...

 106 block      Compaq Next Generation Drive Array, third controller
                  0 = /dev/cciss/c2d0   First logical drive, whole disk
                 16 = /dev/cciss/c2d1   Second logical drive, whole disk
                    ...
                240 = /dev/cciss/c2d15  16th logical drive, whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

 107 char       3Dfx Voodoo Graphics device
                  0 = /dev/3dfx         Primary 3Dfx graphics device

 107 block      Compaq Next Generation Drive Array, fourth controller
                  0 = /dev/cciss/c3d0   First logical drive, whole disk
                 16 = /dev/cciss/c3d1   Second logical drive, whole disk
                    ...
                240 = /dev/cciss/c3d15  16th logical drive, whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

 108 char       Device independent PPP interface
                  0 = /dev/ppp          Device independent PPP interface

 108 block      Compaq Next Generation Drive Array, fifth controller
                  0 = /dev/cciss/c4d0   First logical drive, whole disk
                 16 = /dev/cciss/c4d1   Second logical drive, whole disk
                    ...
                240 = /dev/cciss/c4d15  16th logical drive, whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

 109 char       Reserved for logical volume manager

 109 block      Compaq Next Generation Drive Array, sixth controller
                  0 = /dev/cciss/c5d0   First logical drive, whole disk
                 16 = /dev/cciss/c5d1   Second logical drive, whole disk
                    ...
                240 = /dev/cciss/c5d15  16th logical drive, whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

 110 char       miroMEDIA Surround board
                  0 = /dev/srnd0        First miroMEDIA Surround board
                  1 = /dev/srnd1        Second miroMEDIA Surround board
                    ...

 110 block      Compaq Next Generation Drive Array, seventh controller
                  0 = /dev/cciss/c6d0   First logical drive, whole disk
                 16 = /dev/cciss/c6d1   Second logical drive, whole disk
                    ...
                240 = /dev/cciss/c6d15  16th logical drive, whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

 111 char

 111 block      Compaq Next Generation Drive Array, eighth controller
                  0 = /dev/cciss/c7d0   First logical drive, whole disk
                 16 = /dev/cciss/c7d1   Second logical drive, whole disk
                    ...
                240 = /dev/cciss/c7d15  16th logical drive, whole disk

                Partitions are handled the same way as for Mylex
                DAC960 (see major number 48) except that the limit on
                partitions is 15.

 112 char       ISI serial card
                  0 = /dev/ttyM0        First ISI port
                  1 = /dev/ttyM1        Second ISI port
                    ...

                There is currently a device-naming conflict between
                these and PAM multimodems (major 78).

 112 block      IBM iSeries virtual disk
                  0 = /dev/iseries/vda  First virtual disk, whole disk
                  8 = /dev/iseries/vdb  Second virtual disk, whole disk
                    ...
                200 = /dev/iseries/vdz  26th virtual disk, whole disk
                208 = /dev/iseries/vdaa 27th virtual disk, whole disk
                    ...
                248 = /dev/iseries/vdaf 32nd virtual disk, whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 7.

 113 char       ISI serial card - alternate devices
                  0 = /dev/cum0         Callout device for ttyM0
                  1 = /dev/cum1         Callout device for ttyM1
                    ...

 113 block      IBM iSeries virtual CD-ROM
                  0 = /dev/iseries/vcda First virtual CD-ROM
                  1 = /dev/iseries/vcdb Second virtual CD-ROM
                    ...

 114 char       Picture Elements ISE board
                  0 = /dev/ise0         First ISE board
                  1 = /dev/ise1         Second ISE board
                    ...
                128 = /dev/isex0        Control node for first ISE board
                129 = /dev/isex1        Control node for second ISE board
                    ...

                The ISE board is an embedded computer, optimized for
                image processing. The /dev/iseN nodes are the general
                I/O access to the board, the /dev/isex0 nodes command
                nodes used to control the board.

 114 block       IDE BIOS powered software RAID interfaces such as the
                Promise Fastrak

                   0 = /dev/ataraid/d0
                   1 = /dev/ataraid/d0p1
                   2 = /dev/ataraid/d0p2
                  ...
                  16 = /dev/ataraid/d1
                  17 = /dev/ataraid/d1p1
                  18 = /dev/ataraid/d1p2
                  ...
                 255 = /dev/ataraid/d15p15

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 115 char       TI link cable devices (115 was formerly the console driver speaker)
                  0 = /dev/tipar0    Parallel cable on first parallel port
                  ...
                  7 = /dev/tipar7    Parallel cable on seventh parallel port

                  8 = /dev/tiser0    Serial cable on first serial port
                  ...
                 15 = /dev/tiser7    Serial cable on seventh serial port

                 16 = /dev/tiusb0    First USB cable
                  ...
                 47 = /dev/tiusb31   32nd USB cable

 115 block       NetWare (NWFS) Devices (0-255)

                The NWFS (NetWare) devices are used to present a
                collection of NetWare Mirror Groups or NetWare
                Partitions as a logical storage segment for
                use in mounting NetWare volumes.  A maximum of
                 256 NetWare volumes can be supported in a single
                machine.

                http://cgfa.telepac.pt/ftp2/kernel.org/linux/kernel/people/jmerkey/nwfs/

                 0 = /dev/nwfs/v0    First NetWare (NWFS) Logical Volume
                 1 = /dev/nwfs/v1    Second NetWare (NWFS) Logical Volume
                 2 = /dev/nwfs/v2    Third NetWare (NWFS) Logical Volume
                      ...
                 255 = /dev/nwfs/v255    Last NetWare (NWFS) Logical Volume

 116 char       Advanced Linux Sound Driver (ALSA)

 116 block       MicroMemory battery backed RAM adapter (NVRAM)
                Supports 16 boards, 15 partitions each.
                Requested by neilb at cse.unsw.edu.au.

                 0 = /dev/umem/d0      Whole of first board
                 1 = /dev/umem/d0p1    First partition of first board
                 2 = /dev/umem/d0p2    Second partition of first board
                15 = /dev/umem/d0p15   15th partition of first board

                16 = /dev/umem/d1      Whole of second board
                17 = /dev/umem/d1p1    First partition of second board
                    ...
                255= /dev/umem/d15p15  15th partition of 16th board.

 117 char       COSA/SRP synchronous serial card
                  0 = /dev/cosa0c0      1st board, 1st channel
                  1 = /dev/cosa0c1      1st board, 2nd channel
                    ...
                 16 = /dev/cosa1c0      2nd board, 1st channel
                 17 = /dev/cosa1c1      2nd board, 2nd channel
                    ...

 117 block       Enterprise Volume Management System (EVMS)

                The EVMS driver uses a layered, plug-in model to provide
                unparalleled flexibility and extensibility in managing
                storage.  This allows for easy expansion or customization
                of various levels of volume management.  Requested by
                Mark Peloquin (peloquin at us.ibm.com).

                Note: EVMS populates and manages all the devnodes in
                /dev/evms.

                http://sf.net/projects/evms

                   0 = /dev/evms/block_device   EVMS block device
                   1 = /dev/evms/legacyname1    First EVMS legacy device
                   2 = /dev/evms/legacyname2    Second EVMS legacy device
                    ...
                    Both ranges can grow (down or up) until they meet.
                    ...
                 254 = /dev/evms/EVMSname2      Second EVMS native device
                 255 = /dev/evms/EVMSname1      First EVMS native device

                Note: legacyname(s) are derived from the normal legacy
                device names.  For example, /dev/hda5 would become
                /dev/evms/hda5.

 118 char       IBM Cryptographic Accelerator
                  0 = /dev/ica  Virtual interface to all IBM Crypto Accelerators
                  1 = /dev/ica0 IBMCA Device 0
                  2 = /dev/ica1 IBMCA Device 1
                    ...

 119 char       VMware virtual network control
                  0 = /dev/vnet0        1st virtual network
                  1 = /dev/vnet1        2nd virtual network
                    ...

 120-127 char   LOCAL/EXPERIMENTAL USE

 120-127 block  LOCAL/EXPERIMENTAL USE
                Allocated for local/experimental use.  For devices not
                assigned official numbers, these ranges should be
                used in order to avoid conflicting with future assignments.

 128-135 char   Unix98 PTY masters

                These devices should not have corresponding device
                nodes; instead they should be accessed through the
                /dev/ptmx cloning interface.

 128 block       SCSI disk devices (128-143)
                   0 = /dev/sddy         129th SCSI disk whole disk
                  16 = /dev/sddz         130th SCSI disk whole disk
                  32 = /dev/sdea         131th SCSI disk whole disk
                    ...
                 240 = /dev/sden         144th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 129 block       SCSI disk devices (144-159)
                   0 = /dev/sdeo         145th SCSI disk whole disk
                  16 = /dev/sdep         146th SCSI disk whole disk
                  32 = /dev/sdeq         147th SCSI disk whole disk
                    ...
                 240 = /dev/sdfd         160th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 130 char       (Misc devices)

 130 block       SCSI disk devices (160-175)
                   0 = /dev/sdfe         161st SCSI disk whole disk
                  16 = /dev/sdff         162nd SCSI disk whole disk
                  32 = /dev/sdfg         163rd SCSI disk whole disk
                    ...
                 240 = /dev/sdft         176th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 131 block       SCSI disk devices (176-191)
                   0 = /dev/sdfu         177th SCSI disk whole disk
                  16 = /dev/sdfv         178th SCSI disk whole disk
                  32 = /dev/sdfw         179th SCSI disk whole disk
                    ...
                 240 = /dev/sdgj         192nd SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 132 block       SCSI disk devices (192-207)
                   0 = /dev/sdgk         193rd SCSI disk whole disk
                  16 = /dev/sdgl         194th SCSI disk whole disk
                  32 = /dev/sdgm         195th SCSI disk whole disk
                    ...
                 240 = /dev/sdgz         208th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 133 block       SCSI disk devices (208-223)
                   0 = /dev/sdha         209th SCSI disk whole disk
                  16 = /dev/sdhb         210th SCSI disk whole disk
                  32 = /dev/sdhc         211th SCSI disk whole disk
                    ...
                 240 = /dev/sdhp         224th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 134 block       SCSI disk devices (224-239)
                   0 = /dev/sdhq         225th SCSI disk whole disk
                  16 = /dev/sdhr         226th SCSI disk whole disk
                  32 = /dev/sdhs         227th SCSI disk whole disk
                    ...
                 240 = /dev/sdif         240th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 135 block       SCSI disk devices (240-255)
                   0 = /dev/sdig         241st SCSI disk whole disk
                  16 = /dev/sdih         242nd SCSI disk whole disk
                  32 = /dev/sdih         243rd SCSI disk whole disk
                    ...
                 240 = /dev/sdiv         256th SCSI disk whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 136-143 char   Unix98 PTY slaves
                  0 = /dev/pts/0        First Unix98 pseudo-TTY
                  1 = /dev/pts/1        Second Unix98 pseudo-TTY
                    ...

                These device nodes are automatically generated with
                the proper permissions and modes by mounting the
                devpts filesystem onto /dev/pts with the appropriate
                mount options (distribution dependent, however, on
                *most* distributions the appropriate options are
                "mode=0620,gid=<gid of the "tty" group>".)

 136 block      Mylex DAC960 PCI RAID controller; ninth controller
                  0 = /dev/rd/c8d0      First disk, whole disk
                  8 = /dev/rd/c8d1      Second disk, whole disk
                    ...
                248 = /dev/rd/c8d31     32nd disk, whole disk

                Partitions are handled as for major 48.

 137 block      Mylex DAC960 PCI RAID controller; tenth controller
                  0 = /dev/rd/c9d0      First disk, whole disk
                  8 = /dev/rd/c9d1      Second disk, whole disk
                    ...
                248 = /dev/rd/c9d31     32nd disk, whole disk

                Partitions are handled as for major 48.

 138 block      Mylex DAC960 PCI RAID controller; eleventh controller
                  0 = /dev/rd/c10d0     First disk, whole disk
                  8 = /dev/rd/c10d1     Second disk, whole disk
                    ...
                248 = /dev/rd/c10d31    32nd disk, whole disk

                Partitions are handled as for major 48.

 139 block      Mylex DAC960 PCI RAID controller; twelfth controller
                  0 = /dev/rd/c11d0     First disk, whole disk
                  8 = /dev/rd/c11d1     Second disk, whole disk
                    ...
                248 = /dev/rd/c11d31    32nd disk, whole disk

                Partitions are handled as for major 48.

 140 block      Mylex DAC960 PCI RAID controller; thirteenth controller
                  0 = /dev/rd/c12d0     First disk, whole disk
                  8 = /dev/rd/c12d1     Second disk, whole disk
                    ...
                248 = /dev/rd/c12d31    32nd disk, whole disk

                Partitions are handled as for major 48.

 141 block      Mylex DAC960 PCI RAID controller; fourteenth controller
                  0 = /dev/rd/c13d0     First disk, whole disk
                  8 = /dev/rd/c13d1     Second disk, whole disk
                    ...
                248 = /dev/rd/c13d31    32nd disk, whole disk

                Partitions are handled as for major 48.

 142 block      Mylex DAC960 PCI RAID controller; fifteenth controller
                  0 = /dev/rd/c14d0     First disk, whole disk
                  8 = /dev/rd/c14d1     Second disk, whole disk
                    ...
                248 = /dev/rd/c14d31    32nd disk, whole disk

                Partitions are handled as for major 48.

 143 block      Mylex DAC960 PCI RAID controller; sixteenth controller
                  0 = /dev/rd/c15d0     First disk, whole disk
                  8 = /dev/rd/c15d1     Second disk, whole disk
                    ...
                248 = /dev/rd/c15d31    32nd disk, whole disk

                Partitions are handled as for major 48.

 144 char       Encapsulated PPP
                  0 = /dev/pppox0       First PPP over Ethernet
                    ...
                 63 = /dev/pppox63      64th PPP over Ethernet

                This is primarily used for ADSL.

                The SST 5136-DN DeviceNet interface driver has been
                relocated to major 183 due to an unfortunate conflict.

 144 block      Expansion Area #1 for more non-device (e.g. NFS) mounts
                  0 = mounted device 256
                255 = mounted device 511

 145 char       SAM9407-based soundcard
                  0 = /dev/sam0_mixer
                  1 = /dev/sam0_sequencer
                  2 = /dev/sam0_midi00
                  3 = /dev/sam0_dsp
                  4 = /dev/sam0_audio
                  6 = /dev/sam0_sndstat
                 18 = /dev/sam0_midi01
                 34 = /dev/sam0_midi02
                 50 = /dev/sam0_midi03
                 64 = /dev/sam1_mixer
                    ...
                128 = /dev/sam2_mixer
                    ...
                192 = /dev/sam3_mixer
                    ...

                Device functions match OSS, but offer a number of
                addons, which are sam9407 specific.  OSS can be
                operated simultaneously, taking care of the codec.

 145 block      Expansion Area #2 for more non-device (e.g. NFS) mounts
                  0 = mounted device 512
                255 = mounted device 767

 146 char       SYSTRAM SCRAMNet mirrored-memory network
                  0 = /dev/scramnet0    First SCRAMNet device
                  1 = /dev/scramnet1    Second SCRAMNet device
                    ...

 146 block      Expansion Area #3 for more non-device (e.g. NFS) mounts
                  0 = mounted device 768
                255 = mounted device 1023

 147 char       Aureal Semiconductor Vortex Audio device
                  0 = /dev/aureal0      First Aureal Vortex
                  1 = /dev/aureal1      Second Aureal Vortex
                    ...

 147 block      Distributed Replicated Block Device (DRBD)
                  0 = /dev/drbd0        First DRBD device
                  1 = /dev/drbd1        Second DRBD device
                    ...

 148 char       Technology Concepts serial card
                  0 = /dev/ttyT0        First TCL port
                  1 = /dev/ttyT1        Second TCL port
                    ...

 149 char       Technology Concepts serial card - alternate devices
                  0 = /dev/cut0         Callout device for ttyT0
                  1 = /dev/cut0         Callout device for ttyT1
                    ...

 150 char       Real-Time Linux FIFOs
                  0 = /dev/rtf0         First RTLinux FIFO
                  1 = /dev/rtf1         Second RTLinux FIFO
                    ...

 151 char       DPT I2O SmartRaid V controller
                  0 = /dev/dpti0        First DPT I2O adapter
                  1 = /dev/dpti1        Second DPT I2O adapter
                    ...

 152 char       EtherDrive Control Device
                  0 = /dev/etherd/ctl   Connect/Disconnect an EtherDrive
                  1 = /dev/etherd/err   Monitor errors
                  2 = /dev/etherd/raw   Raw AoE packet monitor

 152 block      EtherDrive Block Devices
                  0 = /dev/etherd/0     EtherDrive 0
                    ...
                255 = /dev/etherd/255   EtherDrive 255

 153 char       SPI Bus Interface (sometimes referred to as MicroWire)
                  0 = /dev/spi0         First SPI device on the bus
                  1 = /dev/spi1         Second SPI device on the bus
                    ...
                 15 = /dev/spi15        Sixteenth SPI device on the bus

 153 block      Enhanced Metadisk RAID (EMD) storage units
                  0 = /dev/emd/0        First unit
                  1 = /dev/emd/0p1      Partition 1 on First unit
                  2 = /dev/emd/0p2      Partition 2 on First unit
                    ...
                 15 = /dev/emd/0p15     Partition 15 on First unit

                 16 = /dev/emd/1        Second unit
                 32 = /dev/emd/2        Third unit
                    ...
                240 = /dev/emd/15       Sixteenth unit

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 154 char       Specialix RIO serial card
                  0 = /dev/ttySR0       First RIO port
                    ...
                255 = /dev/ttySR255     256th RIO port

 155 char       Specialix RIO serial card - alternate devices
                  0 = /dev/cusr0        Callout device for ttySR0
                    ...
                255 = /dev/cusr255      Callout device for ttySR255

 156 char       Specialix RIO serial card
                  0 = /dev/ttySR256     257th RIO port
                    ...
                255 = /dev/ttySR511     512th RIO port

 157 char       Specialix RIO serial card - alternate devices
                  0 = /dev/cusr256      Callout device for ttySR256
                    ...
                255 = /dev/cusr511      Callout device for ttySR511

 158 char       Dialogic GammaLink fax driver
                  0 = /dev/gfax0        GammaLink channel 0
                  1 = /dev/gfax1        GammaLink channel 1
                    ...

 159 char       RESERVED

 159 block      RESERVED

 160 char       General Purpose Instrument Bus (GPIB)
                  0 = /dev/gpib0        First GPIB bus
                  1 = /dev/gpib1        Second GPIB bus
                    ...

 160 block       Carmel 8-port SATA Disks on First Controller
                  0 = /dev/carmel/0     SATA disk 0 whole disk
                  1 = /dev/carmel/0p1   SATA disk 0 partition 1
                    ...
                 31 = /dev/carmel/0p31  SATA disk 0 partition 31

                 32 = /dev/carmel/1     SATA disk 1 whole disk
                 64 = /dev/carmel/2     SATA disk 2 whole disk
                    ...
                224 = /dev/carmel/7     SATA disk 7 whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 31.

 161 char       IrCOMM devices (IrDA serial/parallel emulation)
                  0 = /dev/ircomm0      First IrCOMM device
                  1 = /dev/ircomm1      Second IrCOMM device
                    ...
                 16 = /dev/irlpt0       First IrLPT device
                 17 = /dev/irlpt1       Second IrLPT device
                    ...

 161 block       Carmel 8-port SATA Disks on Second Controller
                  0 = /dev/carmel/8     SATA disk 8 whole disk
                  1 = /dev/carmel/8p1   SATA disk 8 partition 1
                    ...
                 31 = /dev/carmel/8p31  SATA disk 8 partition 31

                 32 = /dev/carmel/9     SATA disk 9 whole disk
                 64 = /dev/carmel/10    SATA disk 10 whole disk
                    ...
                224 = /dev/carmel/15    SATA disk 15 whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 31.

 162 char       Raw block device interface
                  0 = /dev/rawctl       Raw I/O control device
                  1 = /dev/raw/raw1     First raw I/O device
                  2 = /dev/raw/raw2     Second raw I/O device
                    ...
                 max minor number of raw device is set by kernel config
                 MAX_RAW_DEVS or raw module parameter 'max_raw_devs'

 163 char

 164 char       Chase Research AT/PCI-Fast serial card
                  0 = /dev/ttyCH0       AT/PCI-Fast board 0, port 0
                    ...
                 15 = /dev/ttyCH15      AT/PCI-Fast board 0, port 15
                 16 = /dev/ttyCH16      AT/PCI-Fast board 1, port 0
                    ...
                 31 = /dev/ttyCH31      AT/PCI-Fast board 1, port 15
                 32 = /dev/ttyCH32      AT/PCI-Fast board 2, port 0
                    ...
                 47 = /dev/ttyCH47      AT/PCI-Fast board 2, port 15
                 48 = /dev/ttyCH48      AT/PCI-Fast board 3, port 0
                    ...
                 63 = /dev/ttyCH63      AT/PCI-Fast board 3, port 15

 165 char       Chase Research AT/PCI-Fast serial card - alternate devices
                  0 = /dev/cuch0        Callout device for ttyCH0
                    ...
                 63 = /dev/cuch63       Callout device for ttyCH63

 166 char       ACM USB modems
                  0 = /dev/ttyACM0      First ACM modem
                  1 = /dev/ttyACM1      Second ACM modem
                    ...

 167 char       ACM USB modems - alternate devices
                  0 = /dev/cuacm0       Callout device for ttyACM0
                  1 = /dev/cuacm1       Callout device for ttyACM1
                    ...

 168 char       Eracom CSA7000 PCI encryption adaptor
                  0 = /dev/ecsa0        First CSA7000
                  1 = /dev/ecsa1        Second CSA7000
                    ...

 169 char       Eracom CSA8000 PCI encryption adaptor
                  0 = /dev/ecsa8-0      First CSA8000
                  1 = /dev/ecsa8-1      Second CSA8000
                    ...

 170 char       AMI MegaRAC remote access controller
                  0 = /dev/megarac0     First MegaRAC card
                  1 = /dev/megarac1     Second MegaRAC card
                    ...

 171 char       Reserved for IEEE 1394 (Firewire)

 172 char       Moxa Intellio serial card
                  0 = /dev/ttyMX0       First Moxa port
                  1 = /dev/ttyMX1       Second Moxa port
                    ...
                127 = /dev/ttyMX127     128th Moxa port
                128 = /dev/moxactl      Moxa control port

 173 char       Moxa Intellio serial card - alternate devices
                  0 = /dev/cumx0        Callout device for ttyMX0
                  1 = /dev/cumx1        Callout device for ttyMX1
                    ...
                127 = /dev/cumx127      Callout device for ttyMX127

 174 char       SmartIO serial card
                  0 = /dev/ttySI0       First SmartIO port
                  1 = /dev/ttySI1       Second SmartIO port
                    ...

 175 char       SmartIO serial card - alternate devices
                  0 = /dev/cusi0        Callout device for ttySI0
                  1 = /dev/cusi1        Callout device for ttySI1
                    ...

 176 char       nCipher nFast PCI crypto accelerator
                  0 = /dev/nfastpci0    First nFast PCI device
                  1 = /dev/nfastpci1    First nFast PCI device
                    ...

 177 char       TI PCILynx memory spaces
                  0 = /dev/pcilynx/aux0  AUX space of first PCILynx card
                    ...
                 15 = /dev/pcilynx/aux15 AUX space of 16th PCILynx card
                 16 = /dev/pcilynx/rom0  ROM space of first PCILynx card
                    ...
                 31 = /dev/pcilynx/rom15 ROM space of 16th PCILynx card
                 32 = /dev/pcilynx/ram0  RAM space of first PCILynx card
                    ...
                 47 = /dev/pcilynx/ram15 RAM space of 16th PCILynx card

 178 char       Giganet cLAN1xxx virtual interface adapter
                  0 = /dev/clanvi0      First cLAN adapter
                  1 = /dev/clanvi1      Second cLAN adapter
                    ...

 179 block       MMC block devices
                  0 = /dev/mmcblk0      First SD/MMC card
                  1 = /dev/mmcblk0p1    First partition on first MMC card
                  8 = /dev/mmcblk1      Second SD/MMC card
                    ...

                The start of next SD/MMC card can be configured with
                CONFIG_MMC_BLOCK_MINORS, or overridden at boot/modprobe
                time using the mmcblk.perdev_minors option. That would
                bump the offset between each card to be the configured
                value instead of the default 8.

 179 char       CCube DVXChip-based PCI products
                  0 = /dev/dvxirq0      First DVX device
                  1 = /dev/dvxirq1      Second DVX device
                    ...

 180 char       USB devices
                  0 = /dev/usb/lp0      First USB printer
                    ...
                 15 = /dev/usb/lp15     16th USB printer
                 48 = /dev/usb/scanner0 First USB scanner
                    ...
                 63 = /dev/usb/scanner15 16th USB scanner
                 64 = /dev/usb/rio500   Diamond Rio 500
                 65 = /dev/usb/usblcd   USBLCD Interface (info@usblcd.de)
                 66 = /dev/usb/cpad0    Synaptics cPad (mouse/LCD)
                 96 = /dev/usb/hiddev0  1st USB HID device
                    ...
                111 = /dev/usb/hiddev15 16th USB HID device
                112 = /dev/usb/auer0    1st auerswald ISDN device
                    ...
                127 = /dev/usb/auer15   16th auerswald ISDN device
                128 = /dev/usb/brlvgr0  First Braille Voyager device
                    ...
                131 = /dev/usb/brlvgr3  Fourth Braille Voyager device
                132 = /dev/usb/idmouse  ID Mouse (fingerprint scanner) device
                133 = /dev/usb/sisusbvga1       First SiSUSB VGA device
                    ...
                140 = /dev/usb/sisusbvga8       Eighth SISUSB VGA device
                144 = /dev/usb/lcd      USB LCD device
                160 = /dev/usb/legousbtower0    1st USB Legotower device
                    ...
                175 = /dev/usb/legousbtower15   16th USB Legotower device
                176 = /dev/usb/usbtmc1  First USB TMC device
                   ...
                191 = /dev/usb/usbtmc16 16th USB TMC device
                192 = /dev/usb/yurex1   First USB Yurex device
                   ...
                209 = /dev/usb/yurex16  16th USB Yurex device

 180 block      USB block devices
                  0 = /dev/uba          First USB block device
                  8 = /dev/ubb          Second USB block device
                 16 = /dev/ubc          Third USB block device
                    ...

 181 char       Conrad Electronic parallel port radio clocks
                  0 = /dev/pcfclock0    First Conrad radio clock
                  1 = /dev/pcfclock1    Second Conrad radio clock
                    ...

 182 char       Picture Elements THR2 binarizer
                  0 = /dev/pethr0       First THR2 board
                  1 = /dev/pethr1       Second THR2 board
                    ...

 183 char       SST 5136-DN DeviceNet interface
                  0 = /dev/ss5136dn0    First DeviceNet interface
                  1 = /dev/ss5136dn1    Second DeviceNet interface
                    ...

                This device used to be assigned to major number 144.
                It had to be moved due to an unfortunate conflict.

 184 char       Picture Elements' video simulator/sender
                  0 = /dev/pevss0       First sender board
                  1 = /dev/pevss1       Second sender board
                    ...

 185 char       InterMezzo high availability file system
                  0 = /dev/intermezzo0  First cache manager
                  1 = /dev/intermezzo1  Second cache manager
                    ...

                See http://web.archive.org/web/20080115195241/
                http://inter-mezzo.org/index.html

 186 char       Object-based storage control device
                  0 = /dev/obd0         First obd control device
                  1 = /dev/obd1         Second obd control device
                    ...

                See ftp://ftp.lustre.org/pub/obd for code and information.

 187 char       DESkey hardware encryption device
                  0 = /dev/deskey0      First DES key
                  1 = /dev/deskey1      Second DES key
                    ...

 188 char       USB serial converters
                  0 = /dev/ttyUSB0      First USB serial converter
                  1 = /dev/ttyUSB1      Second USB serial converter
                    ...

 189 char       USB serial converters - alternate devices
                  0 = /dev/cuusb0       Callout device for ttyUSB0
                  1 = /dev/cuusb1       Callout device for ttyUSB1
                    ...

 190 char       Kansas City tracker/tuner card
                  0 = /dev/kctt0        First KCT/T card
                  1 = /dev/kctt1        Second KCT/T card
                    ...

 191 char       Reserved for PCMCIA

 192 char       Kernel profiling interface
                  0 = /dev/profile      Profiling control device
                  1 = /dev/profile0     Profiling device for CPU 0
                  2 = /dev/profile1     Profiling device for CPU 1
                    ...

 193 char       Kernel event-tracing interface
                  0 = /dev/trace        Tracing control device
                  1 = /dev/trace0       Tracing device for CPU 0
                  2 = /dev/trace1       Tracing device for CPU 1
                    ...

 194 char       linVideoStreams (LINVS)
                  0 = /dev/mvideo/status0       Video compression status
                  1 = /dev/mvideo/stream0       Video stream
                  2 = /dev/mvideo/frame0        Single compressed frame
                  3 = /dev/mvideo/rawframe0     Raw uncompressed frame
                  4 = /dev/mvideo/codec0        Direct codec access
                  5 = /dev/mvideo/video4linux0  Video4Linux compatibility

                 16 = /dev/mvideo/status1       Second device
                    ...
                 32 = /dev/mvideo/status2       Third device
                    ...
                    ...
                240 = /dev/mvideo/status15      16th device
                    ...

 195 char       Nvidia graphics devices
                  0 = /dev/nvidia0              First Nvidia card
                  1 = /dev/nvidia1              Second Nvidia card
                    ...
                255 = /dev/nvidiactl            Nvidia card control device

 196 char       Tormenta T1 card
                  0 = /dev/tor/0                Master control channel for all cards
                  1 = /dev/tor/1                First DS0
                  2 = /dev/tor/2                Second DS0
                    ...
                 48 = /dev/tor/48               48th DS0
                 49 = /dev/tor/49               First pseudo-channel
                 50 = /dev/tor/50               Second pseudo-channel
                    ...

 197 char       OpenTNF tracing facility
                  0 = /dev/tnf/t0               Trace 0 data extraction
                  1 = /dev/tnf/t1               Trace 1 data extraction
                    ...
                128 = /dev/tnf/status           Tracing facility status
                130 = /dev/tnf/trace            Tracing device

 198 char       Total Impact TPMP2 quad coprocessor PCI card
                  0 = /dev/tpmp2/0              First card
                  1 = /dev/tpmp2/1              Second card
                    ...

 199 char       Veritas volume manager (VxVM) volumes
                  0 = /dev/vx/rdsk/*/*          First volume
                  1 = /dev/vx/rdsk/*/*          Second volume
                    ...

 199 block      Veritas volume manager (VxVM) volumes
                  0 = /dev/vx/dsk/*/*           First volume
                  1 = /dev/vx/dsk/*/*           Second volume
                    ...

                The namespace in these directories is maintained by
                the user space VxVM software.

 200 char       Veritas VxVM configuration interface
                   0 = /dev/vx/config           Configuration access node
                   1 = /dev/vx/trace            Volume i/o trace access node
                   2 = /dev/vx/iod              Volume i/o daemon access node
                   3 = /dev/vx/info             Volume information access node
                   4 = /dev/vx/task             Volume tasks access node
                   5 = /dev/vx/taskmon          Volume tasks monitor daemon

 201 char       Veritas VxVM dynamic multipathing driver
                  0 = /dev/vx/rdmp/*            First multipath device
                  1 = /dev/vx/rdmp/*            Second multipath device
                    ...
 201 block      Veritas VxVM dynamic multipathing driver
                  0 = /dev/vx/dmp/*             First multipath device
                  1 = /dev/vx/dmp/*             Second multipath device
                    ...

                The namespace in these directories is maintained by
                the user space VxVM software.

 202 char       CPU model-specific registers
                  0 = /dev/cpu/0/msr            MSRs on CPU 0
                  1 = /dev/cpu/1/msr            MSRs on CPU 1
                    ...

 202 block      Xen Virtual Block Device
                  0 = /dev/xvda       First Xen VBD whole disk
                  16 = /dev/xvdb      Second Xen VBD whole disk
                  32 = /dev/xvdc      Third Xen VBD whole disk
                    ...
                  240 = /dev/xvdp     Sixteenth Xen VBD whole disk

                Partitions are handled in the same way as for IDE
                disks (see major number 3) except that the limit on
                partitions is 15.

 203 char       CPU CPUID information
                  0 = /dev/cpu/0/cpuid          CPUID on CPU 0
                  1 = /dev/cpu/1/cpuid          CPUID on CPU 1
                    ...

 204 char       Low-density serial ports
                  0 = /dev/ttyLU0               LinkUp Systems L72xx UART - port 0
                  1 = /dev/ttyLU1               LinkUp Systems L72xx UART - port 1
                  2 = /dev/ttyLU2               LinkUp Systems L72xx UART - port 2
                  3 = /dev/ttyLU3               LinkUp Systems L72xx UART - port 3
                  4 = /dev/ttyFB0               Intel Footbridge (ARM)
                  5 = /dev/ttySA0               StrongARM builtin serial port 0
                  6 = /dev/ttySA1               StrongARM builtin serial port 1
                  7 = /dev/ttySA2               StrongARM builtin serial port 2
                  8 = /dev/ttySC0               SCI serial port (SuperH) - port 0
                  9 = /dev/ttySC1               SCI serial port (SuperH) - port 1
                 10 = /dev/ttySC2               SCI serial port (SuperH) - port 2
                 11 = /dev/ttySC3               SCI serial port (SuperH) - port 3
                 12 = /dev/ttyFW0               Firmware console - port 0
                 13 = /dev/ttyFW1               Firmware console - port 1
                 14 = /dev/ttyFW2               Firmware console - port 2
                 15 = /dev/ttyFW3               Firmware console - port 3
                 16 = /dev/ttyAM0               ARM "AMBA" serial port 0
                    ...
                 31 = /dev/ttyAM15              ARM "AMBA" serial port 15
                 32 = /dev/ttyDB0               DataBooster serial port 0
                    ...
                 39 = /dev/ttyDB7               DataBooster serial port 7
                 40 = /dev/ttySG0               SGI Altix console port
                 41 = /dev/ttySMX0              Motorola i.MX - port 0
                 42 = /dev/ttySMX1              Motorola i.MX - port 1
                 43 = /dev/ttySMX2              Motorola i.MX - port 2
                 44 = /dev/ttyMM0               Marvell MPSC - port 0
                 45 = /dev/ttyMM1               Marvell MPSC - port 1
                 46 = /dev/ttyCPM0              PPC CPM (SCC or SMC) - port 0
                    ...
                 47 = /dev/ttyCPM5              PPC CPM (SCC or SMC) - port 5
                 50 = /dev/ttyIOC0              Altix serial card
                    ...
                 81 = /dev/ttyIOC31             Altix serial card
                 82 = /dev/ttyVR0               NEC VR4100 series SIU
                 83 = /dev/ttyVR1               NEC VR4100 series DSIU
                 84 = /dev/ttyIOC84             Altix ioc4 serial card
                    ...
                 115 = /dev/ttyIOC115           Altix ioc4 serial card
                 116 = /dev/ttySIOC0            Altix ioc3 serial card
                    ...
                 147 = /dev/ttySIOC31           Altix ioc3 serial card
                 148 = /dev/ttyPSC0             PPC PSC - port 0
                    ...
                 153 = /dev/ttyPSC5             PPC PSC - port 5
                 154 = /dev/ttyAT0              ATMEL serial port 0
                    ...
                 169 = /dev/ttyAT15             ATMEL serial port 15
                 170 = /dev/ttyNX0              Hilscher netX serial port 0
                    ...
                 185 = /dev/ttyNX15             Hilscher netX serial port 15
                 186 = /dev/ttyJ0               JTAG1 DCC protocol based serial port emulation
                 187 = /dev/ttyUL0              Xilinx uartlite - port 0
                    ...
                 190 = /dev/ttyUL3              Xilinx uartlite - port 3
                 191 = /dev/xvc0                Xen virtual console - port 0
                 192 = /dev/ttyPZ0              pmac_zilog - port 0
                    ...
                 195 = /dev/ttyPZ3              pmac_zilog - port 3
                 196 = /dev/ttyTX0              TX39/49 serial port 0
                    ...
                 204 = /dev/ttyTX7              TX39/49 serial port 7
                 205 = /dev/ttySC0              SC26xx serial port 0
                 206 = /dev/ttySC1              SC26xx serial port 1
                 207 = /dev/ttySC2              SC26xx serial port 2
                 208 = /dev/ttySC3              SC26xx serial port 3
                 209 = /dev/ttyMAX0             MAX3100 serial port 0
                 210 = /dev/ttyMAX1             MAX3100 serial port 1
                 211 = /dev/ttyMAX2             MAX3100 serial port 2
                 212 = /dev/ttyMAX3             MAX3100 serial port 3

 205 char       Low-density serial ports (alternate device)
                  0 = /dev/culu0                Callout device for ttyLU0
                  1 = /dev/culu1                Callout device for ttyLU1
                  2 = /dev/culu2                Callout device for ttyLU2
                  3 = /dev/culu3                Callout device for ttyLU3
                  4 = /dev/cufb0                Callout device for ttyFB0
                  5 = /dev/cusa0                Callout device for ttySA0
                  6 = /dev/cusa1                Callout device for ttySA1
                  7 = /dev/cusa2                Callout device for ttySA2
                  8 = /dev/cusc0                Callout device for ttySC0
                  9 = /dev/cusc1                Callout device for ttySC1
                 10 = /dev/cusc2                Callout device for ttySC2
                 11 = /dev/cusc3                Callout device for ttySC3
                 12 = /dev/cufw0                Callout device for ttyFW0
                 13 = /dev/cufw1                Callout device for ttyFW1
                 14 = /dev/cufw2                Callout device for ttyFW2
                 15 = /dev/cufw3                Callout device for ttyFW3
                 16 = /dev/cuam0                Callout device for ttyAM0
                    ...
                 31 = /dev/cuam15               Callout device for ttyAM15
                 32 = /dev/cudb0                Callout device for ttyDB0
                    ...
                 39 = /dev/cudb7                Callout device for ttyDB7
                 40 = /dev/cusg0                Callout device for ttySG0
                 41 = /dev/ttycusmx0            Callout device for ttySMX0
                 42 = /dev/ttycusmx1            Callout device for ttySMX1
                 43 = /dev/ttycusmx2            Callout device for ttySMX2
                 46 = /dev/cucpm0               Callout device for ttyCPM0
                    ...
                 49 = /dev/cucpm5               Callout device for ttyCPM5
                 50 = /dev/cuioc40              Callout device for ttyIOC40
                    ...
                 81 = /dev/cuioc431             Callout device for ttyIOC431
                 82 = /dev/cuvr0                Callout device for ttyVR0
                 83 = /dev/cuvr1                Callout device for ttyVR1

 206 char       OnStream SC-x0 tape devices
                  0 = /dev/osst0                First OnStream SCSI tape, mode 0
                  1 = /dev/osst1                Second OnStream SCSI tape, mode 0
                    ...
                 32 = /dev/osst0l               First OnStream SCSI tape, mode 1
                 33 = /dev/osst1l               Second OnStream SCSI tape, mode 1
                    ...
                 64 = /dev/osst0m               First OnStream SCSI tape, mode 2
                 65 = /dev/osst1m               Second OnStream SCSI tape, mode 2
                    ...
                 96 = /dev/osst0a               First OnStream SCSI tape, mode 3
                 97 = /dev/osst1a               Second OnStream SCSI tape, mode 3
                    ...
                128 = /dev/nosst0               No rewind version of /dev/osst0
                129 = /dev/nosst1               No rewind version of /dev/osst1
                    ...
                160 = /dev/nosst0l              No rewind version of /dev/osst0l
                161 = /dev/nosst1l              No rewind version of /dev/osst1l
                    ...
                192 = /dev/nosst0m              No rewind version of /dev/osst0m
                193 = /dev/nosst1m              No rewind version of /dev/osst1m
                    ...
                224 = /dev/nosst0a              No rewind version of /dev/osst0a
                225 = /dev/nosst1a              No rewind version of /dev/osst1a
                    ...

                The OnStream SC-x0 SCSI tapes do not support the
                standard SCSI SASD command set and therefore need
                their own driver "osst". Note that the IDE, USB (and
                maybe ParPort) versions may be driven via ide-scsi or
                usb-storage SCSI emulation and this osst device and
                driver as well.  The ADR-x0 drives are QIC-157
                compliant and don't need osst.

 207 char       Compaq ProLiant health feature indicate
                  0 = /dev/cpqhealth/cpqw       Redirector interface
                  1 = /dev/cpqhealth/crom       EISA CROM
                  2 = /dev/cpqhealth/cdt        Data Table
                  3 = /dev/cpqhealth/cevt       Event Log
                  4 = /dev/cpqhealth/casr       Automatic Server Recovery
                  5 = /dev/cpqhealth/cecc       ECC Memory
                  6 = /dev/cpqhealth/cmca       Machine Check Architecture
                  7 = /dev/cpqhealth/ccsm       Deprecated CDT
                  8 = /dev/cpqhealth/cnmi       NMI Handling
                  9 = /dev/cpqhealth/css        Sideshow Management
                 10 = /dev/cpqhealth/cram       CMOS interface
                 11 = /dev/cpqhealth/cpci       PCI IRQ interface

 208 char       User space serial ports
                  0 = /dev/ttyU0                First user space serial port
                  1 = /dev/ttyU1                Second user space serial port
                    ...

 209 char       User space serial ports (alternate devices)
                  0 = /dev/cuu0                 Callout device for ttyU0
                  1 = /dev/cuu1                 Callout device for ttyU1
                    ...

 210 char       SBE, Inc. sync/async serial card
                  0 = /dev/sbei/wxcfg0          Configuration device for board 0
                  1 = /dev/sbei/dld0            Download device for board 0
                  2 = /dev/sbei/wan00           WAN device, port 0, board 0
                  3 = /dev/sbei/wan01           WAN device, port 1, board 0
                  4 = /dev/sbei/wan02           WAN device, port 2, board 0
                  5 = /dev/sbei/wan03           WAN device, port 3, board 0
                  6 = /dev/sbei/wanc00          WAN clone device, port 0, board 0
                  7 = /dev/sbei/wanc01          WAN clone device, port 1, board 0
                  8 = /dev/sbei/wanc02          WAN clone device, port 2, board 0
                  9 = /dev/sbei/wanc03          WAN clone device, port 3, board 0
                 10 = /dev/sbei/wxcfg1          Configuration device for board 1
                 11 = /dev/sbei/dld1            Download device for board 1
                 12 = /dev/sbei/wan10           WAN device, port 0, board 1
                 13 = /dev/sbei/wan11           WAN device, port 1, board 1
                 14 = /dev/sbei/wan12           WAN device, port 2, board 1
                 15 = /dev/sbei/wan13           WAN device, port 3, board 1
                 16 = /dev/sbei/wanc10          WAN clone device, port 0, board 1
                 17 = /dev/sbei/wanc11          WAN clone device, port 1, board 1
                 18 = /dev/sbei/wanc12          WAN clone device, port 2, board 1
                 19 = /dev/sbei/wanc13          WAN clone device, port 3, board 1
                    ...

                Yes, each board is really spaced 10 (decimal) apart.

 211 char       Addinum CPCI1500 digital I/O card
                  0 = /dev/addinum/cpci1500/0   First CPCI1500 card
                  1 = /dev/addinum/cpci1500/1   Second CPCI1500 card
                    ...

 212 char       LinuxTV.org DVB driver subsystem
                  0 = /dev/dvb/adapter0/video0    first video decoder of first card
                  1 = /dev/dvb/adapter0/audio0    first audio decoder of first card
                  2 = /dev/dvb/adapter0/sec0      (obsolete/unused)
                  3 = /dev/dvb/adapter0/frontend0 first frontend device of first card
                  4 = /dev/dvb/adapter0/demux0    first demux device of first card
                  5 = /dev/dvb/adapter0/dvr0      first digital video recoder device of first card
                  6 = /dev/dvb/adapter0/ca0       first common access port of first card
                  7 = /dev/dvb/adapter0/net0      first network device of first card
                  8 = /dev/dvb/adapter0/osd0      first on-screen-display device of first card
                  9 = /dev/dvb/adapter0/video1    second video decoder of first card
                    ...
                 64 = /dev/dvb/adapter1/video0    first video decoder of second card
                    ...
                128 = /dev/dvb/adapter2/video0    first video decoder of third card
                    ...
                196 = /dev/dvb/adapter3/video0    first video decoder of fourth card

 216 char       Bluetooth RFCOMM TTY devices
                  0 = /dev/rfcomm0              First Bluetooth RFCOMM TTY device
                  1 = /dev/rfcomm1              Second Bluetooth RFCOMM TTY device
                    ...

 217 char       Bluetooth RFCOMM TTY devices (alternate devices)
                  0 = /dev/curf0                Callout device for rfcomm0
                  1 = /dev/curf1                Callout device for rfcomm1
                    ...

 218 char       The Logical Company bus Unibus/Qbus adapters
                  0 = /dev/logicalco/bci/0      First bus adapter
                  1 = /dev/logicalco/bci/1      First bus adapter
                    ...

 219 char       The Logical Company DCI-1300 digital I/O card
                  0 = /dev/logicalco/dci1300/0  First DCI-1300 card
                  1 = /dev/logicalco/dci1300/1  Second DCI-1300 card
                    ...

 220 char       Myricom Myrinet "GM" board
                  0 = /dev/myricom/gm0          First Myrinet GM board
                  1 = /dev/myricom/gmp0         First board "root access"
                  2 = /dev/myricom/gm1          Second Myrinet GM board
                  3 = /dev/myricom/gmp1         Second board "root access"
                    ...

 221 char       VME bus
                  0 = /dev/bus/vme/m0           First master image
                  1 = /dev/bus/vme/m1           Second master image
                  2 = /dev/bus/vme/m2           Third master image
                  3 = /dev/bus/vme/m3           Fourth master image
                  4 = /dev/bus/vme/s0           First slave image
                  5 = /dev/bus/vme/s1           Second slave image
                  6 = /dev/bus/vme/s2           Third slave image
                  7 = /dev/bus/vme/s3           Fourth slave image
                  8 = /dev/bus/vme/ctl          Control

                It is expected that all VME bus drivers will use the
                same interface.  For interface documentation see
                http://www.vmelinux.org/.

 224 char       A2232 serial card
                  0 = /dev/ttyY0                First A2232 port
                  1 = /dev/ttyY1                Second A2232 port
                    ...

 225 char       A2232 serial card (alternate devices)
                  0 = /dev/cuy0                 Callout device for ttyY0
                  1 = /dev/cuy1                 Callout device for ttyY1
                    ...

 226 char       Direct Rendering Infrastructure (DRI)
                  0 = /dev/dri/card0            First graphics card
                  1 = /dev/dri/card1            Second graphics card
                    ...

 227 char       IBM 3270 terminal Unix tty access
                  1 = /dev/3270/tty1            First 3270 terminal
                  2 = /dev/3270/tty2            Seconds 3270 terminal
                    ...

 228 char       IBM 3270 terminal block-mode access
                  0 = /dev/3270/tub             Controlling interface
                  1 = /dev/3270/tub1            First 3270 terminal
                  2 = /dev/3270/tub2            Second 3270 terminal
                    ...

 229 char       IBM iSeries/pSeries virtual console
                  0 = /dev/hvc0                 First console port
                  1 = /dev/hvc1                 Second console port
                    ...

 230 char       IBM iSeries virtual tape
                  0 = /dev/iseries/vt0          First virtual tape, mode 0
                  1 = /dev/iseries/vt1          Second virtual tape, mode 0
                    ...
                 32 = /dev/iseries/vt0l         First virtual tape, mode 1
                 33 = /dev/iseries/vt1l         Second virtual tape, mode 1
                    ...
                 64 = /dev/iseries/vt0m         First virtual tape, mode 2
                 65 = /dev/iseries/vt1m         Second virtual tape, mode 2
                    ...
                 96 = /dev/iseries/vt0a         First virtual tape, mode 3
                 97 = /dev/iseries/vt1a         Second virtual tape, mode 3
                      ...
                128 = /dev/iseries/nvt0         First virtual tape, mode 0, no rewind
                129 = /dev/iseries/nvt1         Second virtual tape, mode 0, no rewind
                    ...
                160 = /dev/iseries/nvt0l        First virtual tape, mode 1, no rewind
                161 = /dev/iseries/nvt1l        Second virtual tape, mode 1, no rewind
                    ...
                192 = /dev/iseries/nvt0m        First virtual tape, mode 2, no rewind
                193 = /dev/iseries/nvt1m        Second virtual tape, mode 2, no rewind
                    ...
                224 = /dev/iseries/nvt0a        First virtual tape, mode 3, no rewind
                225 = /dev/iseries/nvt1a        Second virtual tape, mode 3, no rewind
                    ...

                "No rewind" refers to the omission of the default
                automatic rewind on device close.  The MTREW or MTOFFL
                ioctl()'s can be used to rewind the tape regardless of
                the device used to access it.

 231 char       InfiniBand
                0 = /dev/infiniband/umad0
                1 = /dev/infiniband/umad1
                  ...
                63 = /dev/infiniband/umad63    63rd InfiniBandMad device
                64 = /dev/infiniband/issm0     First InfiniBand IsSM device
                65 = /dev/infiniband/issm1     Second InfiniBand IsSM device
                  ...
                127 = /dev/infiniband/issm63    63rd InfiniBand IsSM device
                128 = /dev/infiniband/uverbs0   First InfiniBand verbs device
                129 = /dev/infiniband/uverbs1   Second InfiniBand verbs device
                  ...
                159 = /dev/infiniband/uverbs31  31st InfiniBand verbs device

 232 char       Biometric Devices
                0 = /dev/biometric/sensor0/fingerprint  first fingerprint sensor on first device
                1 = /dev/biometric/sensor0/iris         first iris sensor on first device
                2 = /dev/biometric/sensor0/retina       first retina sensor on first device
                3 = /dev/biometric/sensor0/voiceprint   first voiceprint sensor on first device
                4 = /dev/biometric/sensor0/facial       first facial sensor on first device
                5 = /dev/biometric/sensor0/hand         first hand sensor on first device
                  ...
                10 = /dev/biometric/sensor1/fingerprint first fingerprint sensor on second device
                  ...
                20 = /dev/biometric/sensor2/fingerprint first fingerprint sensor on third device
                  ...

 233 char       PathScale InfiniPath interconnect
                0 = /dev/ipath        Primary device for programs (any unit)
                1 = /dev/ipath0       Access specifically to unit 0
                2 = /dev/ipath1       Access specifically to unit 1
                  ...
                4 = /dev/ipath3       Access specifically to unit 3
                129 = /dev/ipath_sma    Device used by Subnet Management Agent
                130 = /dev/ipath_diag   Device used by diagnostics programs

 234-254        char    RESERVED FOR DYNAMIC ASSIGNMENT
                Character devices that request a dynamic allocation of major number will
                take numbers starting from 254 and downward.

 240-254 block  LOCAL/EXPERIMENTAL USE
                Allocated for local/experimental use.  For devices not
                assigned official numbers, these ranges should be
                used in order to avoid conflicting with future assignments.

 255 char       RESERVED

 255 block      RESERVED

                This major is reserved to assist the expansion to a
                larger number space.  No device nodes with this major
                should ever be created on the filesystem.
                (This is probably not true anymore, but I'll leave it
                for now /Torben)

 ---LARGE MAJORS!!!!!---

 256 char       Equinox SST multi-port serial boards
                   0 = /dev/ttyEQ0      First serial port on first Equinox SST board
                 127 = /dev/ttyEQ127    Last serial port on first Equinox SST board
                 128 = /dev/ttyEQ128    First serial port on second Equinox SST board
                  ...
                1027 = /dev/ttyEQ1027   Last serial port on eighth Equinox SST board

 256 block      Resident Flash Disk Flash Translation Layer
                  0 = /dev/rfda         First RFD FTL layer
                 16 = /dev/rfdb         Second RFD FTL layer
                  ...
                240 = /dev/rfdp         16th RFD FTL layer

 257 char       Phoenix Technologies Cryptographic Services Driver
                  0 = /dev/ptlsec       Crypto Services Driver

 257 block      SSFDC Flash Translation Layer filesystem
                  0 = /dev/ssfdca       First SSFDC layer
                  8 = /dev/ssfdcb       Second SSFDC layer
                 16 = /dev/ssfdcc       Third SSFDC layer
                 24 = /dev/ssfdcd       4th SSFDC layer
                 32 = /dev/ssfdce       5th SSFDC layer
                 40 = /dev/ssfdcf       6th SSFDC layer
                 48 = /dev/ssfdcg       7th SSFDC layer
                 56 = /dev/ssfdch       8th SSFDC layer

 258 block      ROM/Flash read-only translation layer
                  0 = /dev/blockrom0    First ROM card's translation layer interface
                  1 = /dev/blockrom1    Second ROM card's translation layer interface
                  ...

 259 block      Block Extended Major
                  Used dynamically to hold additional partition minor
                  numbers and allow large numbers of partitions per device

 259 char       FPGA configuration interfaces
                  0 = /dev/icap0        First Xilinx internal configuration
                  1 = /dev/icap1        Second Xilinx internal configuration

 260 char       OSD (Object-based-device) SCSI Device
                  0 = /dev/osd0         First OSD Device
                  1 = /dev/osd1         Second OSD Device
                  ...
                  255 = /dev/osd255     256th OSD Device

 384-511 char   RESERVED FOR DYNAMIC ASSIGNMENT
                Character devices that request a dynamic allocation of major
                number will take numbers starting from 511 and downward,
                once the 234-254 range is full.

Additional /dev/ directory entries

This section details additional entries that should or may exist in the /dev directory. It is preferred that symbolic links use the same form (absolute or relative) as is indicated here. Links are classified as "hard" or "symbolic" depending on the preferred type of link; if possible, the indicated type of link should be used.

Sockets and pipes

Non-transient sockets and named pipes may exist in /dev. Common entries are:

/dev/printer socket lpd local socket
/dev/log socket syslog local socket
/dev/gpmdata socket gpm mouse multiplexer

Mount points

The following names are reserved for mounting special filesystems under /dev. These special filesystems provide kernel interfaces that cannot be provided with standard device nodes.

/dev/pts devpts PTY slave filesystem
/dev/shm tmpfs POSIX shared memory maintenance access

Terminal devices

Terminal, or TTY devices are a special class of character devices. A terminal device is any device that could act as a controlling terminal for a session; this includes virtual consoles, serial ports, and pseudoterminals (PTYs).

All terminal devices share a common set of capabilities known as line disciplines; these include the common terminal line discipline as well as SLIP and PPP modes.

All terminal devices are named similarly; this section explains the naming and use of the various types of TTYs. Note that the naming conventions include several historical warts; some of these are Linux-specific, some were inherited from other systems, and some reflect Linux outgrowing a borrowed convention.

A hash mark (#) in a device name is used here to indicate a decimal number without leading zeroes.

Virtual consoles and the console device

Virtual consoles are full-screen terminal displays on the system video monitor. Virtual consoles are named /dev/tty#, with numbering starting at /dev/tty1; /dev/tty0 is the current virtual console. /dev/tty0 is the device that should be used to access the system video card on those architectures for which the frame buffer devices (/dev/fb*) are not applicable. Do not use /dev/console for this purpose.

The console device, /dev/console, is the device to which system messages should be sent, and on which logins should be permitted in single-user mode. Starting with Linux 2.1.71, /dev/console is managed by the kernel; for previous versions it should be a symbolic link to either /dev/tty0, a specific virtual console such as /dev/tty1, or to a serial port primary (tty*, not cu*) device, depending on the configuration of the system.

Serial ports

Serial ports are RS-232 serial ports and any device which simulates one, either in hardware (such as internal modems) or in software (such as the ISDN driver.) Under Linux, each serial ports has two device names, the primary or callin device and the alternate or callout one. Each kind of device is indicated by a different letter. For any letter X, the names of the devices are /dev/ttyX# and /dev/cux#, respectively; for historical reasons, /dev/ttyS# and /dev/ttyC# correspond to /dev/cua# and /dev/cub#. In the future, it should be expected that multiple letters will be used; all letters will be upper case for the "tty" device (e.g. /dev/ttyDP#) and lower case for the "cu" device (e.g. /dev/cudp#).

The names /dev/ttyQ# and /dev/cuq# are reserved for local use.

The alternate devices provide for kernel-based exclusion and somewhat different defaults than the primary devices. Their main purpose is to allow the use of serial ports with programs with no inherent or broken support for serial ports. Their use is deprecated, and they may be removed from a future version of Linux.

Arbitration of serial ports is provided by the use of lock files with the names /var/lock/LCK..ttyX#. The contents of the lock file should be the PID of the locking process as an ASCII number.

It is common practice to install links such as /dev/modem which point to serial ports. In order to ensure proper locking in the presence of these links, it is recommended that software chase symlinks and lock all possible names; additionally, it is recommended that a lock file be installed with the corresponding alternate device. In order to avoid deadlocks, it is recommended that the locks are acquired in the following order, and released in the reverse:

  1. The symbolic link name, if any (/var/lock/LCK..modem)
  2. The "tty" name (/var/lock/LCK..ttyS2)
  3. The alternate device name (/var/lock/LCK..cua2)

In the case of nested symbolic links, the lock files should be installed in the order the symlinks are resolved.

Under no circumstances should an application hold a lock while waiting for another to be released. In addition, applications which attempt to create lock files for the corresponding alternate device names should take into account the possibility of being used on a non-serial port TTY, for which no alternate device would exist.

Pseudoterminals (PTYs)

Pseudoterminals, or PTYs, are used to create login sessions or provide other capabilities requiring a TTY line discipline (including SLIP or PPP capability) to arbitrary data-generation processes. Each PTY has a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named /dev/tty[p-za-e][0-9a-f]. The kernel arbitrates the use of PTYs by allowing each master side to be opened only once.

Once the master side has been opened, the corresponding slave device can be used in the same manner as any TTY device. The master and slave devices are connected by the kernel, generating the equivalent of a bidirectional pipe with TTY capabilities.

Recent versions of the Linux kernels and GNU libc contain support for the System V/Unix98 naming scheme for PTYs, which assigns a common device, /dev/ptmx, to all the masters (opening it will automatically give you a previously unassigned PTY) and a subdirectory, /dev/pts, for the slaves; the slaves are named with decimal integers (/dev/pts/# in our notation). This removes the problem of exhausting the namespace and enables the kernel to automatically create the device nodes for the slaves on demand using the "devpts" filesystem.