linux/Documentation/devices.txt
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   1
   2                    LINUX ALLOCATED DEVICES (2.6+ version)
   3
   4             Maintained by Alan Cox <device@lanana.org>
   5
   6                      Last revised: 6th April 2009
   7
   8This list is the Linux Device List, the official registry of allocated
   9device numbers and /dev directory nodes for the Linux operating
  10system.
  11
  12The latest version of this list is available from
  13http://www.lanana.org/docs/device-list/ or
  14ftp://ftp.kernel.org/pub/linux/docs/device-list/.  This version may be
  15newer than the one distributed with the Linux kernel.
  16
  17The LaTeX version of this document is no longer maintained.
  18
  19This document is included by reference into the Filesystem Hierarchy
  20Standard (FHS).  The FHS is available from http://www.pathname.com/fhs/.
  21
  22Allocations marked (68k/Amiga) apply to Linux/68k on the Amiga
  23platform only.  Allocations marked (68k/Atari) apply to Linux/68k on
  24the Atari platform only.
  25
  26The symbol {2.6} means the allocation is obsolete and scheduled for
  27removal once kernel version 2.6 (or equivalent) is released. Some of these
  28allocations have already been removed.
  29
  30This document is in the public domain.  The author requests, however,
  31that semantically altered versions are not distributed without
  32permission of the author, assuming the author can be contacted without
  33an unreasonable effort.
  34
  35In particular, please don't sent patches for this list to Linus, at
  36least not without contacting me first.
  37
  38I do not have any information about these devices beyond what appears
  39on this list.  Any such information requests will be deleted without
  40reply.
  41
  42
  43          **** DEVICE DRIVERS AUTHORS PLEASE READ THIS ****
  44
  45To have a major number allocated, or a minor number in situations
  46where that applies (e.g. busmice), please contact me with the
  47appropriate device information.  Also, if you have additional
  48information regarding any of the devices listed below, or if I have
  49made a mistake, I would greatly appreciate a note.
  50
  51I do, however, make a few requests about the nature of your report.
  52This is necessary for me to be able to keep this list up to date and
  53correct in a timely manner.  First of all, *please* send it to the
  54correct address... <device@lanana.org>.  I receive hundreds of email
  55messages a day, so mail sent to other addresses may very well get lost
  56in the avalanche.  Please put in a descriptive subject, so I can find
  57your mail again should I need to.  Too many people send me email
  58saying just "device number request" in the subject.
  59
  60Second, please include a description of the device *in the same format
  61as this list*.  The reason for this is that it is the only way I have
  62found to ensure I have all the requisite information to publish your
  63device and avoid conflicts.
  64
  65Third, please don't assume that the distributed version of the list is
  66up to date.  Due to the number of registrations I have to maintain it
  67in "batch mode", so there is likely additional registrations that
  68haven't been listed yet.
  69
  70Fourth, remember that Linux now has extensive support for dynamic allocation
  71of device numbering and can use sysfs and udev to handle the naming needs.
  72There are still some exceptions in the serial and boot device area. Before
  73asking for a device number make sure you actually need one.
  74
  75Finally, sometimes I have to play "namespace police."  Please don't be
  76offended.  I often get submissions for /dev names that would be bound
  77to cause conflicts down the road.  I am trying to avoid getting in a
  78situation where we would have to suffer an incompatible forward
  79change.  Therefore, please consult with me *before* you make your
  80device names and numbers in any way public, at least to the point
  81where it would be at all difficult to get them changed.
  82
  83Your cooperation is appreciated.
  84
  85
  86  0             Unnamed devices (e.g. non-device mounts)
  87                  0 = reserved as null device number
  88                See block major 144, 145, 146 for expansion areas.
  89
  90  1 char        Memory devices
  91                  1 = /dev/mem          Physical memory access
  92                  2 = /dev/kmem         Kernel virtual memory access
  93                  3 = /dev/null         Null device
  94                  4 = /dev/port         I/O port access
  95                  5 = /dev/zero         Null byte source
  96                  6 = /dev/core         OBSOLETE - replaced by /proc/kcore
  97                  7 = /dev/full         Returns ENOSPC on write
  98                  8 = /dev/random       Nondeterministic random number gen.
  99                  9 = /dev/urandom      Faster, less secure random number gen.
 100                 10 = /dev/aio          Asynchronous I/O notification interface
 101                 11 = /dev/kmsg         Writes to this come out as printk's, reads
 102                                        export the buffered printk records.
 103                 12 = /dev/oldmem       OBSOLETE - replaced by /proc/vmcore
 104
 105  1 block       RAM disk
 106                  0 = /dev/ram0         First RAM disk
 107                  1 = /dev/ram1         Second RAM disk
 108                    ...
 109                250 = /dev/initrd       Initial RAM disk
 110
 111                Older kernels had /dev/ramdisk (1, 1) here.
 112                /dev/initrd refers to a RAM disk which was preloaded
 113                by the boot loader; newer kernels use /dev/ram0 for
 114                the initrd.
 115
 116  2 char        Pseudo-TTY masters
 117                  0 = /dev/ptyp0        First PTY master
 118                  1 = /dev/ptyp1        Second PTY master
 119                    ...
 120                255 = /dev/ptyef        256th PTY master
 121
 122                Pseudo-tty's are named as follows:
 123                * Masters are "pty", slaves are "tty";
 124                * the fourth letter is one of pqrstuvwxyzabcde indicating
 125                  the 1st through 16th series of 16 pseudo-ttys each, and
 126                * the fifth letter is one of 0123456789abcdef indicating
 127                  the position within the series.
 128
 129                These are the old-style (BSD) PTY devices; Unix98
 130                devices are on major 128 and above and use the PTY
 131                master multiplex (/dev/ptmx) to acquire a PTY on
 132                demand.
 133
 134  2 block       Floppy disks
 135                  0 = /dev/fd0          Controller 0, drive 0, autodetect
 136                  1 = /dev/fd1          Controller 0, drive 1, autodetect
 137                  2 = /dev/fd2          Controller 0, drive 2, autodetect
 138                  3 = /dev/fd3          Controller 0, drive 3, autodetect
 139                128 = /dev/fd4          Controller 1, drive 0, autodetect
 140                129 = /dev/fd5          Controller 1, drive 1, autodetect
 141                130 = /dev/fd6          Controller 1, drive 2, autodetect
 142                131 = /dev/fd7          Controller 1, drive 3, autodetect
 143
 144                To specify format, add to the autodetect device number:
 145                  0 = /dev/fd?          Autodetect format
 146                  4 = /dev/fd?d360      5.25"  360K in a 360K  drive(1)
 147                 20 = /dev/fd?h360      5.25"  360K in a 1200K drive(1)
 148                 48 = /dev/fd?h410      5.25"  410K in a 1200K drive
 149                 64 = /dev/fd?h420      5.25"  420K in a 1200K drive
 150                 24 = /dev/fd?h720      5.25"  720K in a 1200K drive
 151                 80 = /dev/fd?h880      5.25"  880K in a 1200K drive(1)
 152                  8 = /dev/fd?h1200     5.25" 1200K in a 1200K drive(1)
 153                 40 = /dev/fd?h1440     5.25" 1440K in a 1200K drive(1)
 154                 56 = /dev/fd?h1476     5.25" 1476K in a 1200K drive
 155                 72 = /dev/fd?h1494     5.25" 1494K in a 1200K drive
 156                 92 = /dev/fd?h1600     5.25" 1600K in a 1200K drive(1)
 157
 158                 12 = /dev/fd?u360      3.5"   360K Double Density(2)
 159                 16 = /dev/fd?u720      3.5"   720K Double Density(1)
 160                120 = /dev/fd?u800      3.5"   800K Double Density(2)
 161                 52 = /dev/fd?u820      3.5"   820K Double Density
 162                 68 = /dev/fd?u830      3.5"   830K Double Density
 163                 84 = /dev/fd?u1040     3.5"  1040K Double Density(1)
 164                 88 = /dev/fd?u1120     3.5"  1120K Double Density(1)
 165                 28 = /dev/fd?u1440     3.5"  1440K High Density(1)
 166                124 = /dev/fd?u1600     3.5"  1600K High Density(1)
 167                 44 = /dev/fd?u1680     3.5"  1680K High Density(3)
 168                 60 = /dev/fd?u1722     3.5"  1722K High Density
 169                 76 = /dev/fd?u1743     3.5"  1743K High Density
 170                 96 = /dev/fd?u1760     3.5"  1760K High Density
 171                116 = /dev/fd?u1840     3.5"  1840K High Density(3)
 172                100 = /dev/fd?u1920     3.5"  1920K High Density(1)
 173                 32 = /dev/fd?u2880     3.5"  2880K Extra Density(1)
 174                104 = /dev/fd?u3200     3.5"  3200K Extra Density
 175                108 = /dev/fd?u3520     3.5"  3520K Extra Density
 176                112 = /dev/fd?u3840     3.5"  3840K Extra Density(1)
 177
 178                 36 = /dev/fd?CompaQ    Compaq 2880K drive; obsolete?
 179
 180                (1) Autodetectable format
 181                (2) Autodetectable format in a Double Density (720K) drive only
 182                (3) Autodetectable format in a High Density (1440K) drive only
 183
 184                NOTE: The letter in the device name (d, q, h or u)
 185                signifies the type of drive: 5.25" Double Density (d),
 186                5.25" Quad Density (q), 5.25" High Density (h) or 3.5"
 187                (any model, u).  The use of the capital letters D, H
 188                and E for the 3.5" models have been deprecated, since
 189                the drive type is insignificant for these devices.
 190
 191  3 char        Pseudo-TTY slaves
 192                  0 = /dev/ttyp0        First PTY slave
 193                  1 = /dev/ttyp1        Second PTY slave
 194                    ...
 195                255 = /dev/ttyef        256th PTY slave
 196
 197                These are the old-style (BSD) PTY devices; Unix98
 198                devices are on major 136 and above.
 199
 200  3 block       First MFM, RLL and IDE hard disk/CD-ROM interface
 201                  0 = /dev/hda          Master: whole disk (or CD-ROM)
 202                 64 = /dev/hdb          Slave: whole disk (or CD-ROM)
 203
 204                For partitions, add to the whole disk device number:
 205                  0 = /dev/hd?          Whole disk
 206                  1 = /dev/hd?1         First partition
 207                  2 = /dev/hd?2         Second partition
 208                    ...
 209                 63 = /dev/hd?63        63rd partition
 210
 211                For Linux/i386, partitions 1-4 are the primary
 212                partitions, and 5 and above are logical partitions.
 213                Other versions of Linux use partitioning schemes
 214                appropriate to their respective architectures.
 215
 216  4 char        TTY devices
 217                  0 = /dev/tty0         Current virtual console
 218
 219                  1 = /dev/tty1         First virtual console
 220                    ...
 221                 63 = /dev/tty63        63rd virtual console
 222                 64 = /dev/ttyS0        First UART serial port
 223                    ...
 224                255 = /dev/ttyS191      192nd UART serial port
 225
 226                UART serial ports refer to 8250/16450/16550 series devices.
 227
 228                Older versions of the Linux kernel used this major
 229                number for BSD PTY devices.  As of Linux 2.1.115, this
 230                is no longer supported.  Use major numbers 2 and 3.
 231
 232  4 block       Aliases for dynamically allocated major devices to be used
 233                when its not possible to create the real device nodes
 234                because the root filesystem is mounted read-only.
 235
 236                  0 = /dev/root
 237
 238  5 char        Alternate TTY devices
 239                  0 = /dev/tty          Current TTY device
 240                  1 = /dev/console      System console
 241                  2 = /dev/ptmx         PTY master multiplex
 242                  3 = /dev/ttyprintk    User messages via printk TTY device
 243                 64 = /dev/cua0         Callout device for ttyS0
 244                    ...
 245                255 = /dev/cua191       Callout device for ttyS191
 246
 247                (5,1) is /dev/console starting with Linux 2.1.71.  See
 248                the section on terminal devices for more information
 249                on /dev/console.
 250
 251  6 char        Parallel printer devices
 252                  0 = /dev/lp0          Parallel printer on parport0
 253                  1 = /dev/lp1          Parallel printer on parport1
 254                    ...
 255
 256                Current Linux kernels no longer have a fixed mapping
 257                between parallel ports and I/O addresses.  Instead,
 258                they are redirected through the parport multiplex layer.
 259
 260  7 char        Virtual console capture devices
 261                  0 = /dev/vcs          Current vc text contents
 262                  1 = /dev/vcs1         tty1 text contents
 263                    ...
 264                 63 = /dev/vcs63        tty63 text contents
 265                128 = /dev/vcsa         Current vc text/attribute contents
 266                129 = /dev/vcsa1        tty1 text/attribute contents
 267                    ...
 268                191 = /dev/vcsa63       tty63 text/attribute contents
 269
 270                NOTE: These devices permit both read and write access.
 271
 272  7 block       Loopback devices
 273                  0 = /dev/loop0        First loop device
 274                  1 = /dev/loop1        Second loop device
 275                    ...
 276
 277                The loop devices are used to mount filesystems not
 278                associated with block devices.  The binding to the
 279                loop devices is handled by mount(8) or losetup(8).
 280
 281  8 block       SCSI disk devices (0-15)
 282                  0 = /dev/sda          First SCSI disk whole disk
 283                 16 = /dev/sdb          Second SCSI disk whole disk
 284                 32 = /dev/sdc          Third SCSI disk whole disk
 285                    ...
 286                240 = /dev/sdp          Sixteenth SCSI disk whole disk
 287
 288                Partitions are handled in the same way as for IDE
 289                disks (see major number 3) except that the limit on
 290                partitions is 15.
 291
 292  9 char        SCSI tape devices
 293                  0 = /dev/st0          First SCSI tape, mode 0
 294                  1 = /dev/st1          Second SCSI tape, mode 0
 295                    ...
 296                 32 = /dev/st0l         First SCSI tape, mode 1
 297                 33 = /dev/st1l         Second SCSI tape, mode 1
 298                    ...
 299                 64 = /dev/st0m         First SCSI tape, mode 2
 300                 65 = /dev/st1m         Second SCSI tape, mode 2
 301                    ...
 302                 96 = /dev/st0a         First SCSI tape, mode 3
 303                 97 = /dev/st1a         Second SCSI tape, mode 3
 304                      ...
 305                128 = /dev/nst0         First SCSI tape, mode 0, no rewind
 306                129 = /dev/nst1         Second SCSI tape, mode 0, no rewind
 307                    ...
 308                160 = /dev/nst0l        First SCSI tape, mode 1, no rewind
 309                161 = /dev/nst1l        Second SCSI tape, mode 1, no rewind
 310                    ...
 311                192 = /dev/nst0m        First SCSI tape, mode 2, no rewind
 312                193 = /dev/nst1m        Second SCSI tape, mode 2, no rewind
 313                    ...
 314                224 = /dev/nst0a        First SCSI tape, mode 3, no rewind
 315                225 = /dev/nst1a        Second SCSI tape, mode 3, no rewind
 316                    ...
 317
 318                "No rewind" refers to the omission of the default
 319                automatic rewind on device close.  The MTREW or MTOFFL
 320                ioctl()'s can be used to rewind the tape regardless of
 321                the device used to access it.
 322
 323  9 block       Metadisk (RAID) devices
 324                  0 = /dev/md0          First metadisk group
 325                  1 = /dev/md1          Second metadisk group
 326                    ...
 327
 328                The metadisk driver is used to span a
 329                filesystem across multiple physical disks.
 330
 331 10 char        Non-serial mice, misc features
 332                  0 = /dev/logibm       Logitech bus mouse
 333                  1 = /dev/psaux        PS/2-style mouse port
 334                  2 = /dev/inportbm     Microsoft Inport bus mouse
 335                  3 = /dev/atibm        ATI XL bus mouse
 336                  4 = /dev/jbm          J-mouse
 337                  4 = /dev/amigamouse   Amiga mouse (68k/Amiga)
 338                  5 = /dev/atarimouse   Atari mouse
 339                  6 = /dev/sunmouse     Sun mouse
 340                  7 = /dev/amigamouse1  Second Amiga mouse
 341                  8 = /dev/smouse       Simple serial mouse driver
 342                  9 = /dev/pc110pad     IBM PC-110 digitizer pad
 343                 10 = /dev/adbmouse     Apple Desktop Bus mouse
 344                 11 = /dev/vrtpanel     Vr41xx embedded touch panel
 345                 13 = /dev/vpcmouse     Connectix Virtual PC Mouse
 346                 14 = /dev/touchscreen/ucb1x00  UCB 1x00 touchscreen
 347                 15 = /dev/touchscreen/mk712    MK712 touchscreen
 348                128 = /dev/beep         Fancy beep device
 349                129 =
 350                130 = /dev/watchdog     Watchdog timer port
 351                131 = /dev/temperature  Machine internal temperature
 352                132 = /dev/hwtrap       Hardware fault trap
 353                133 = /dev/exttrp       External device trap
 354                134 = /dev/apm_bios     Advanced Power Management BIOS
 355                135 = /dev/rtc          Real Time Clock
 356                139 = /dev/openprom     SPARC OpenBoot PROM
 357                140 = /dev/relay8       Berkshire Products Octal relay card
 358                141 = /dev/relay16      Berkshire Products ISO-16 relay card
 359                142 =
 360                143 = /dev/pciconf      PCI configuration space
 361                144 = /dev/nvram        Non-volatile configuration RAM
 362                145 = /dev/hfmodem      Soundcard shortwave modem control
 363                146 = /dev/graphics     Linux/SGI graphics device
 364                147 = /dev/opengl       Linux/SGI OpenGL pipe
 365                148 = /dev/gfx          Linux/SGI graphics effects device
 366                149 = /dev/input/mouse  Linux/SGI Irix emulation mouse
 367                150 = /dev/input/keyboard Linux/SGI Irix emulation keyboard
 368                151 = /dev/led          Front panel LEDs
 369                152 = /dev/kpoll        Kernel Poll Driver
 370                153 = /dev/mergemem     Memory merge device
 371                154 = /dev/pmu          Macintosh PowerBook power manager
 372                155 = /dev/isictl       MultiTech ISICom serial control
 373                156 = /dev/lcd          Front panel LCD display
 374                157 = /dev/ac           Applicom Intl Profibus card
 375                158 = /dev/nwbutton     Netwinder external button
 376                159 = /dev/nwdebug      Netwinder debug interface
 377                160 = /dev/nwflash      Netwinder flash memory
 378                161 = /dev/userdma      User-space DMA access
 379                162 = /dev/smbus        System Management Bus
 380                163 = /dev/lik          Logitech Internet Keyboard
 381                164 = /dev/ipmo         Intel Intelligent Platform Management
 382                165 = /dev/vmmon        VMware virtual machine monitor
 383                166 = /dev/i2o/ctl      I2O configuration manager
 384                167 = /dev/specialix_sxctl Specialix serial control
 385                168 = /dev/tcldrv       Technology Concepts serial control
 386                169 = /dev/specialix_rioctl Specialix RIO serial control
 387                170 = /dev/thinkpad/thinkpad    IBM Thinkpad devices
 388                171 = /dev/srripc       QNX4 API IPC manager
 389                172 = /dev/usemaclone   Semaphore clone device
 390                173 = /dev/ipmikcs      Intelligent Platform Management
 391                174 = /dev/uctrl        SPARCbook 3 microcontroller
 392                175 = /dev/agpgart      AGP Graphics Address Remapping Table
 393                176 = /dev/gtrsc        Gorgy Timing radio clock
 394                177 = /dev/cbm          Serial CBM bus
 395                178 = /dev/jsflash      JavaStation OS flash SIMM
 396                179 = /dev/xsvc         High-speed shared-mem/semaphore service
 397                180 = /dev/vrbuttons    Vr41xx button input device
 398                181 = /dev/toshiba      Toshiba laptop SMM support
 399                182 = /dev/perfctr      Performance-monitoring counters
 400                183 = /dev/hwrng        Generic random number generator
 401                184 = /dev/cpu/microcode CPU microcode update interface
 402                186 = /dev/atomicps     Atomic shapshot of process state data
 403                187 = /dev/irnet        IrNET device
 404                188 = /dev/smbusbios    SMBus BIOS
 405                189 = /dev/ussp_ctl     User space serial port control
 406                190 = /dev/crash        Mission Critical Linux crash dump facility
 407                191 = /dev/pcl181       <information missing>
 408                192 = /dev/nas_xbus     NAS xbus LCD/buttons access
 409                193 = /dev/d7s          SPARC 7-segment display
 410                194 = /dev/zkshim       Zero-Knowledge network shim control
 411                195 = /dev/elographics/e2201    Elographics touchscreen E271-2201
 412                196 = /dev/vfio/vfio    VFIO userspace driver interface
 413                198 = /dev/sexec        Signed executable interface
 414                199 = /dev/scanners/cuecat :CueCat barcode scanner
 415                200 = /dev/net/tun      TAP/TUN network device
 416                201 = /dev/button/gulpb Transmeta GULP-B buttons
 417                202 = /dev/emd/ctl      Enhanced Metadisk RAID (EMD) control
 418                203 = /dev/cuse         Cuse (character device in user-space)
 419                204 = /dev/video/em8300         EM8300 DVD decoder control
 420                205 = /dev/video/em8300_mv      EM8300 DVD decoder video
 421                206 = /dev/video/em8300_ma      EM8300 DVD decoder audio
 422                207 = /dev/video/em8300_sp      EM8300 DVD decoder subpicture
 423                208 = /dev/compaq/cpqphpc       Compaq PCI Hot Plug Controller
 424                209 = /dev/compaq/cpqrid        Compaq Remote Insight Driver
 425                210 = /dev/impi/bt      IMPI coprocessor block transfer
 426                211 = /dev/impi/smic    IMPI coprocessor stream interface
 427                212 = /dev/watchdogs/0  First watchdog device
 428                213 = /dev/watchdogs/1  Second watchdog device
 429                214 = /dev/watchdogs/2  Third watchdog device
 430                215 = /dev/watchdogs/3  Fourth watchdog device
 431                216 = /dev/fujitsu/apanel       Fujitsu/Siemens application panel
 432                217 = /dev/ni/natmotn           National Instruments Motion
 433                218 = /dev/kchuid       Inter-process chuid control
 434                219 = /dev/modems/mwave MWave modem firmware upload
 435                220 = /dev/mptctl       Message passing technology (MPT) control
 436                221 = /dev/mvista/hssdsi        Montavista PICMG hot swap system driver
 437                222 = /dev/mvista/hasi          Montavista PICMG high availability
 438                223 = /dev/input/uinput         User level driver support for input
 439                224 = /dev/tpm          TCPA TPM driver
 440                225 = /dev/pps          Pulse Per Second driver
 441                226 = /dev/systrace     Systrace device
 442                227 = /dev/mcelog       X86_64 Machine Check Exception driver
 443                228 = /dev/hpet         HPET driver
 444                229 = /dev/fuse         Fuse (virtual filesystem in user-space)
 445                230 = /dev/midishare    MidiShare driver
 446                231 = /dev/snapshot     System memory snapshot device
 447                232 = /dev/kvm          Kernel-based virtual machine (hardware virtualization extensions)
 448                233 = /dev/kmview       View-OS A process with a view
 449                234 = /dev/btrfs-control        Btrfs control device
 450                235 = /dev/autofs       Autofs control device
 451                236 = /dev/mapper/control       Device-Mapper control device
 452                237 = /dev/loop-control Loopback control device
 453                238 = /dev/vhost-net    Host kernel accelerator for virtio net
 454
 455                240-254                 Reserved for local use
 456                255                     Reserved for MISC_DYNAMIC_MINOR
 457
 458 11 char        Raw keyboard device     (Linux/SPARC only)
 459                  0 = /dev/kbd          Raw keyboard device
 460
 461 11 char        Serial Mux device       (Linux/PA-RISC only)
 462                  0 = /dev/ttyB0        First mux port
 463                  1 = /dev/ttyB1        Second mux port
 464                    ...
 465
 466 11 block       SCSI CD-ROM devices
 467                  0 = /dev/scd0         First SCSI CD-ROM
 468                  1 = /dev/scd1         Second SCSI CD-ROM
 469                    ...
 470
 471                The prefix /dev/sr (instead of /dev/scd) has been deprecated.
 472
 473 12 char        QIC-02 tape
 474                  2 = /dev/ntpqic11     QIC-11, no rewind-on-close
 475                  3 = /dev/tpqic11      QIC-11, rewind-on-close
 476                  4 = /dev/ntpqic24     QIC-24, no rewind-on-close
 477                  5 = /dev/tpqic24      QIC-24, rewind-on-close
 478                  6 = /dev/ntpqic120    QIC-120, no rewind-on-close
 479                  7 = /dev/tpqic120     QIC-120, rewind-on-close
 480                  8 = /dev/ntpqic150    QIC-150, no rewind-on-close
 481                  9 = /dev/tpqic150     QIC-150, rewind-on-close
 482
 483                The device names specified are proposed -- if there
 484                are "standard" names for these devices, please let me know.
 485
 486 12 block
 487
 488 13 char        Input core
 489                  0 = /dev/input/js0    First joystick
 490                  1 = /dev/input/js1    Second joystick
 491                    ...
 492                 32 = /dev/input/mouse0 First mouse
 493                 33 = /dev/input/mouse1 Second mouse
 494                    ...
 495                 63 = /dev/input/mice   Unified mouse
 496                 64 = /dev/input/event0 First event queue
 497                 65 = /dev/input/event1 Second event queue
 498                    ...
 499
 500                Each device type has 5 bits (32 minors).
 501
 502 13 block       Previously used for the XT disk (/dev/xdN)
 503                Deleted in kernel v3.9.
 504
 505 14 char        Open Sound System (OSS)
 506                  0 = /dev/mixer        Mixer control
 507                  1 = /dev/sequencer    Audio sequencer
 508                  2 = /dev/midi00       First MIDI port
 509                  3 = /dev/dsp          Digital audio
 510                  4 = /dev/audio        Sun-compatible digital audio
 511                  6 =
 512                  7 = /dev/audioctl     SPARC audio control device
 513                  8 = /dev/sequencer2   Sequencer -- alternate device
 514                 16 = /dev/mixer1       Second soundcard mixer control
 515                 17 = /dev/patmgr0      Sequencer patch manager
 516                 18 = /dev/midi01       Second MIDI port
 517                 19 = /dev/dsp1         Second soundcard digital audio
 518                 20 = /dev/audio1       Second soundcard Sun digital audio
 519                 33 = /dev/patmgr1      Sequencer patch manager
 520                 34 = /dev/midi02       Third MIDI port
 521                 50 = /dev/midi03       Fourth MIDI port
 522
 523 14 block
 524
 525 15 char        Joystick
 526                  0 = /dev/js0          First analog joystick
 527                  1 = /dev/js1          Second analog joystick
 528                    ...
 529                128 = /dev/djs0         First digital joystick
 530                129 = /dev/djs1         Second digital joystick
 531                    ...
 532 15 block       Sony CDU-31A/CDU-33A CD-ROM
 533                  0 = /dev/sonycd       Sony CDU-31a CD-ROM
 534
 535 16 char        Non-SCSI scanners
 536                  0 = /dev/gs4500       Genius 4500 handheld scanner
 537
 538 16 block       GoldStar CD-ROM
 539                  0 = /dev/gscd         GoldStar CD-ROM
 540
 541 17 char        OBSOLETE (was Chase serial card)
 542                  0 = /dev/ttyH0        First Chase port
 543                  1 = /dev/ttyH1        Second Chase port
 544                    ...
 545 17 block       Optics Storage CD-ROM
 546                  0 = /dev/optcd        Optics Storage CD-ROM
 547
 548 18 char        OBSOLETE (was Chase serial card - alternate devices)
 549                  0 = /dev/cuh0         Callout device for ttyH0
 550                  1 = /dev/cuh1         Callout device for ttyH1
 551                    ...
 552 18 block       Sanyo CD-ROM
 553                  0 = /dev/sjcd         Sanyo CD-ROM
 554
 555 19 char        Cyclades serial card
 556                  0 = /dev/ttyC0        First Cyclades port
 557                    ...
 558                 31 = /dev/ttyC31       32nd Cyclades port
 559
 560 19 block       "Double" compressed disk
 561                  0 = /dev/double0      First compressed disk
 562                    ...
 563                  7 = /dev/double7      Eighth compressed disk
 564                128 = /dev/cdouble0     Mirror of first compressed disk
 565                    ...
 566                135 = /dev/cdouble7     Mirror of eighth compressed disk
 567
 568                See the Double documentation for the meaning of the
 569                mirror devices.
 570
 571 20 char        Cyclades serial card - alternate devices
 572                  0 = /dev/cub0         Callout device for ttyC0
 573                    ...
 574                 31 = /dev/cub31        Callout device for ttyC31
 575
 576 20 block       Hitachi CD-ROM (under development)
 577                  0 = /dev/hitcd        Hitachi CD-ROM
 578
 579 21 char        Generic SCSI access
 580                  0 = /dev/sg0          First generic SCSI device
 581                  1 = /dev/sg1          Second generic SCSI device
 582                    ...
 583
 584                Most distributions name these /dev/sga, /dev/sgb...;
 585                this sets an unnecessary limit of 26 SCSI devices in
 586                the system and is counter to standard Linux
 587                device-naming practice.
 588
 589 21 block       Acorn MFM hard drive interface
 590                  0 = /dev/mfma         First MFM drive whole disk
 591                 64 = /dev/mfmb         Second MFM drive whole disk
 592
 593                This device is used on the ARM-based Acorn RiscPC.
 594                Partitions are handled the same way as for IDE disks
 595                (see major number 3).
 596
 597 22 char        Digiboard serial card
 598                  0 = /dev/ttyD0        First Digiboard port
 599                  1 = /dev/ttyD1        Second Digiboard port
 600                    ...
 601 22 block       Second IDE hard disk/CD-ROM interface
 602                  0 = /dev/hdc          Master: whole disk (or CD-ROM)
 603                 64 = /dev/hdd          Slave: whole disk (or CD-ROM)
 604
 605                Partitions are handled the same way as for the first
 606                interface (see major number 3).
 607
 608 23 char        Digiboard serial card - alternate devices
 609                  0 = /dev/cud0         Callout device for ttyD0
 610                  1 = /dev/cud1         Callout device for ttyD1
 611                      ...
 612 23 block       Mitsumi proprietary CD-ROM
 613                  0 = /dev/mcd          Mitsumi CD-ROM
 614
 615 24 char        Stallion serial card
 616                  0 = /dev/ttyE0        Stallion port 0 card 0
 617                  1 = /dev/ttyE1        Stallion port 1 card 0
 618                    ...
 619                 64 = /dev/ttyE64       Stallion port 0 card 1
 620                 65 = /dev/ttyE65       Stallion port 1 card 1
 621                      ...
 622                128 = /dev/ttyE128      Stallion port 0 card 2
 623                129 = /dev/ttyE129      Stallion port 1 card 2
 624                    ...
 625                192 = /dev/ttyE192      Stallion port 0 card 3
 626                193 = /dev/ttyE193      Stallion port 1 card 3
 627                    ...
 628 24 block       Sony CDU-535 CD-ROM
 629                  0 = /dev/cdu535       Sony CDU-535 CD-ROM
 630
 631 25 char        Stallion serial card - alternate devices
 632                  0 = /dev/cue0         Callout device for ttyE0
 633                  1 = /dev/cue1         Callout device for ttyE1
 634                    ...
 635                 64 = /dev/cue64        Callout device for ttyE64
 636                 65 = /dev/cue65        Callout device for ttyE65
 637                    ...
 638                128 = /dev/cue128       Callout device for ttyE128
 639                129 = /dev/cue129       Callout device for ttyE129
 640                    ...
 641                192 = /dev/cue192       Callout device for ttyE192
 642                193 = /dev/cue193       Callout device for ttyE193
 643                      ...
 644 25 block       First Matsushita (Panasonic/SoundBlaster) CD-ROM
 645                  0 = /dev/sbpcd0       Panasonic CD-ROM controller 0 unit 0
 646                  1 = /dev/sbpcd1       Panasonic CD-ROM controller 0 unit 1
 647                  2 = /dev/sbpcd2       Panasonic CD-ROM controller 0 unit 2
 648                  3 = /dev/sbpcd3       Panasonic CD-ROM controller 0 unit 3
 649
 650 26 char
 651
 652 26 block       Second Matsushita (Panasonic/SoundBlaster) CD-ROM
 653                  0 = /dev/sbpcd4       Panasonic CD-ROM controller 1 unit 0
 654                  1 = /dev/sbpcd5       Panasonic CD-ROM controller 1 unit 1
 655                  2 = /dev/sbpcd6       Panasonic CD-ROM controller 1 unit 2
 656                  3 = /dev/sbpcd7       Panasonic CD-ROM controller 1 unit 3
 657
 658 27 char        QIC-117 tape
 659                  0 = /dev/qft0         Unit 0, rewind-on-close
 660                  1 = /dev/qft1         Unit 1, rewind-on-close
 661                  2 = /dev/qft2         Unit 2, rewind-on-close
 662                  3 = /dev/qft3         Unit 3, rewind-on-close
 663                  4 = /dev/nqft0        Unit 0, no rewind-on-close
 664                  5 = /dev/nqft1        Unit 1, no rewind-on-close
 665                  6 = /dev/nqft2        Unit 2, no rewind-on-close
 666                  7 = /dev/nqft3        Unit 3, no rewind-on-close
 667                 16 = /dev/zqft0        Unit 0, rewind-on-close, compression
 668                 17 = /dev/zqft1        Unit 1, rewind-on-close, compression
 669                 18 = /dev/zqft2        Unit 2, rewind-on-close, compression
 670                 19 = /dev/zqft3        Unit 3, rewind-on-close, compression
 671                 20 = /dev/nzqft0       Unit 0, no rewind-on-close, compression
 672                 21 = /dev/nzqft1       Unit 1, no rewind-on-close, compression
 673                 22 = /dev/nzqft2       Unit 2, no rewind-on-close, compression
 674                 23 = /dev/nzqft3       Unit 3, no rewind-on-close, compression
 675                 32 = /dev/rawqft0      Unit 0, rewind-on-close, no file marks
 676                 33 = /dev/rawqft1      Unit 1, rewind-on-close, no file marks
 677                 34 = /dev/rawqft2      Unit 2, rewind-on-close, no file marks
 678                 35 = /dev/rawqft3      Unit 3, rewind-on-close, no file marks
 679                 36 = /dev/nrawqft0     Unit 0, no rewind-on-close, no file marks
 680                 37 = /dev/nrawqft1     Unit 1, no rewind-on-close, no file marks
 681                 38 = /dev/nrawqft2     Unit 2, no rewind-on-close, no file marks
 682                 39 = /dev/nrawqft3     Unit 3, no rewind-on-close, no file marks
 683
 684 27 block       Third Matsushita (Panasonic/SoundBlaster) CD-ROM
 685                  0 = /dev/sbpcd8       Panasonic CD-ROM controller 2 unit 0
 686                  1 = /dev/sbpcd9       Panasonic CD-ROM controller 2 unit 1
 687                  2 = /dev/sbpcd10      Panasonic CD-ROM controller 2 unit 2
 688                  3 = /dev/sbpcd11      Panasonic CD-ROM controller 2 unit 3
 689
 690 28 char        Stallion serial card - card programming
 691                  0 = /dev/staliomem0   First Stallion card I/O memory
 692                  1 = /dev/staliomem1   Second Stallion card I/O memory
 693                  2 = /dev/staliomem2   Third Stallion card I/O memory
 694                  3 = /dev/staliomem3   Fourth Stallion card I/O memory
 695
 696 28 char        Atari SLM ACSI laser printer (68k/Atari)
 697                  0 = /dev/slm0         First SLM laser printer
 698                  1 = /dev/slm1         Second SLM laser printer
 699                    ...
 700 28 block       Fourth Matsushita (Panasonic/SoundBlaster) CD-ROM
 701                  0 = /dev/sbpcd12      Panasonic CD-ROM controller 3 unit 0
 702                  1 = /dev/sbpcd13      Panasonic CD-ROM controller 3 unit 1
 703                  2 = /dev/sbpcd14      Panasonic CD-ROM controller 3 unit 2
 704                  3 = /dev/sbpcd15      Panasonic CD-ROM controller 3 unit 3
 705
 706 28 block       ACSI disk (68k/Atari)
 707                  0 = /dev/ada          First ACSI disk whole disk
 708                 16 = /dev/adb          Second ACSI disk whole disk
 709                 32 = /dev/adc          Third ACSI disk whole disk
 710                    ...
 711                240 = /dev/adp          16th ACSI disk whole disk
 712
 713                Partitions are handled in the same way as for IDE
 714                disks (see major number 3) except that the limit on
 715                partitions is 15, like SCSI.
 716
 717 29 char        Universal frame buffer
 718                  0 = /dev/fb0          First frame buffer
 719                  1 = /dev/fb1          Second frame buffer
 720                    ...
 721                 31 = /dev/fb31         32nd frame buffer
 722
 723 29 block       Aztech/Orchid/Okano/Wearnes CD-ROM
 724                  0 = /dev/aztcd        Aztech CD-ROM
 725
 726 30 char        iBCS-2 compatibility devices
 727                  0 = /dev/socksys      Socket access
 728                  1 = /dev/spx          SVR3 local X interface
 729                 32 = /dev/inet/ip      Network access
 730                 33 = /dev/inet/icmp
 731                 34 = /dev/inet/ggp
 732                 35 = /dev/inet/ipip
 733                 36 = /dev/inet/tcp
 734                 37 = /dev/inet/egp
 735                 38 = /dev/inet/pup
 736                 39 = /dev/inet/udp
 737                 40 = /dev/inet/idp
 738                 41 = /dev/inet/rawip
 739
 740                Additionally, iBCS-2 requires the following links:
 741
 742                /dev/ip -> /dev/inet/ip
 743                /dev/icmp -> /dev/inet/icmp
 744                /dev/ggp -> /dev/inet/ggp
 745                /dev/ipip -> /dev/inet/ipip
 746                /dev/tcp -> /dev/inet/tcp
 747                /dev/egp -> /dev/inet/egp
 748                /dev/pup -> /dev/inet/pup
 749                /dev/udp -> /dev/inet/udp
 750                /dev/idp -> /dev/inet/idp
 751                /dev/rawip -> /dev/inet/rawip
 752                /dev/inet/arp -> /dev/inet/udp
 753                /dev/inet/rip -> /dev/inet/udp
 754                /dev/nfsd -> /dev/socksys
 755                /dev/X0R -> /dev/null (? apparently not required ?)
 756
 757 30 block       Philips LMS CM-205 CD-ROM
 758                  0 = /dev/cm205cd      Philips LMS CM-205 CD-ROM
 759
 760                /dev/lmscd is an older name for this device.  This
 761                driver does not work with the CM-205MS CD-ROM.
 762
 763 31 char        MPU-401 MIDI
 764                  0 = /dev/mpu401data   MPU-401 data port
 765                  1 = /dev/mpu401stat   MPU-401 status port
 766
 767 31 block       ROM/flash memory card
 768                  0 = /dev/rom0         First ROM card (rw)
 769                      ...
 770                  7 = /dev/rom7         Eighth ROM card (rw)
 771                  8 = /dev/rrom0        First ROM card (ro)
 772                    ...
 773                 15 = /dev/rrom7        Eighth ROM card (ro)
 774                 16 = /dev/flash0       First flash memory card (rw)
 775                    ...
 776                 23 = /dev/flash7       Eighth flash memory card (rw)
 777                 24 = /dev/rflash0      First flash memory card (ro)
 778                    ...
 779                 31 = /dev/rflash7      Eighth flash memory card (ro)
 780
 781                The read-write (rw) devices support back-caching
 782                written data in RAM, as well as writing to flash RAM
 783                devices.  The read-only devices (ro) support reading
 784                only.
 785
 786 32 char        Specialix serial card
 787                  0 = /dev/ttyX0        First Specialix port
 788                  1 = /dev/ttyX1        Second Specialix port
 789                    ...
 790 32 block       Philips LMS CM-206 CD-ROM
 791                  0 = /dev/cm206cd      Philips LMS CM-206 CD-ROM
 792
 793 33 char        Specialix serial card - alternate devices
 794                  0 = /dev/cux0         Callout device for ttyX0
 795                  1 = /dev/cux1         Callout device for ttyX1
 796                    ...
 797 33 block       Third IDE hard disk/CD-ROM interface
 798                  0 = /dev/hde          Master: whole disk (or CD-ROM)
 799                 64 = /dev/hdf          Slave: whole disk (or CD-ROM)
 800
 801                Partitions are handled the same way as for the first
 802                interface (see major number 3).
 803
 804 34 char        Z8530 HDLC driver
 805                  0 = /dev/scc0         First Z8530, first port
 806                  1 = /dev/scc1         First Z8530, second port
 807                  2 = /dev/scc2         Second Z8530, first port
 808                  3 = /dev/scc3         Second Z8530, second port
 809                    ...
 810
 811                In a previous version these devices were named
 812                /dev/sc1 for /dev/scc0, /dev/sc2 for /dev/scc1, and so
 813                on.
 814
 815 34 block       Fourth IDE hard disk/CD-ROM interface
 816                  0 = /dev/hdg          Master: whole disk (or CD-ROM)
 817                 64 = /dev/hdh          Slave: whole disk (or CD-ROM)
 818
 819                Partitions are handled the same way as for the first
 820                interface (see major number 3).
 821
 822 35 char        tclmidi MIDI driver
 823                  0 = /dev/midi0        First MIDI port, kernel timed
 824                  1 = /dev/midi1        Second MIDI port, kernel timed
 825                  2 = /dev/midi2        Third MIDI port, kernel timed
 826                  3 = /dev/midi3        Fourth MIDI port, kernel timed
 827                 64 = /dev/rmidi0       First MIDI port, untimed
 828                 65 = /dev/rmidi1       Second MIDI port, untimed
 829                 66 = /dev/rmidi2       Third MIDI port, untimed
 830                 67 = /dev/rmidi3       Fourth MIDI port, untimed
 831                128 = /dev/smpte0       First MIDI port, SMPTE timed
 832                129 = /dev/smpte1       Second MIDI port, SMPTE timed
 833                130 = /dev/smpte2       Third MIDI port, SMPTE timed
 834                131 = /dev/smpte3       Fourth MIDI port, SMPTE timed
 835
 836 35 block       Slow memory ramdisk
 837                  0 = /dev/slram        Slow memory ramdisk
 838
 839 36 char        Netlink support
 840                  0 = /dev/route        Routing, device updates, kernel to user
 841                  1 = /dev/skip         enSKIP security cache control
 842                  3 = /dev/fwmonitor    Firewall packet copies
 843                 16 = /dev/tap0         First Ethertap device
 844                    ...
 845                 31 = /dev/tap15        16th Ethertap device
 846
 847 36 block       OBSOLETE (was MCA ESDI hard disk)
 848
 849 37 char        IDE tape
 850                  0 = /dev/ht0          First IDE tape
 851                  1 = /dev/ht1          Second IDE tape
 852                    ...
 853                128 = /dev/nht0         First IDE tape, no rewind-on-close
 854                129 = /dev/nht1         Second IDE tape, no rewind-on-close
 855                    ...
 856
 857                Currently, only one IDE tape drive is supported.
 858
 859 37 block       Zorro II ramdisk
 860                  0 = /dev/z2ram        Zorro II ramdisk
 861
 862 38 char        Myricom PCI Myrinet board
 863                  0 = /dev/mlanai0      First Myrinet board
 864                  1 = /dev/mlanai1      Second Myrinet board
 865                    ...
 866
 867                This device is used for status query, board control
 868                and "user level packet I/O."  This board is also
 869                accessible as a standard networking "eth" device.
 870
 871 38 block       OBSOLETE (was Linux/AP+)
 872
 873 39 char        ML-16P experimental I/O board
 874                  0 = /dev/ml16pa-a0    First card, first analog channel
 875                  1 = /dev/ml16pa-a1    First card, second analog channel
 876                    ...
 877                 15 = /dev/ml16pa-a15   First card, 16th analog channel
 878                 16 = /dev/ml16pa-d     First card, digital lines
 879                 17 = /dev/ml16pa-c0    First card, first counter/timer
 880                 18 = /dev/ml16pa-c1    First card, second counter/timer
 881                 19 = /dev/ml16pa-c2    First card, third counter/timer
 882                 32 = /dev/ml16pb-a0    Second card, first analog channel
 883                 33 = /dev/ml16pb-a1    Second card, second analog channel
 884                    ...
 885                 47 = /dev/ml16pb-a15   Second card, 16th analog channel
 886                 48 = /dev/ml16pb-d     Second card, digital lines
 887                 49 = /dev/ml16pb-c0    Second card, first counter/timer
 888                 50 = /dev/ml16pb-c1    Second card, second counter/timer
 889                 51 = /dev/ml16pb-c2    Second card, third counter/timer
 890                      ...
 891 39 block
 892
 893 40 char
 894
 895 40 block
 896
 897 41 char        Yet Another Micro Monitor
 898                  0 = /dev/yamm         Yet Another Micro Monitor
 899
 900 41 block
 901
 902 42 char        Demo/sample use
 903
 904 42 block       Demo/sample use
 905
 906                This number is intended for use in sample code, as
 907                well as a general "example" device number.  It
 908                should never be used for a device driver that is being
 909                distributed; either obtain an official number or use
 910                the local/experimental range.  The sudden addition or
 911                removal of a driver with this number should not cause
 912                ill effects to the system (bugs excepted.)
 913
 914                IN PARTICULAR, ANY DISTRIBUTION WHICH CONTAINS A
 915                DEVICE DRIVER USING MAJOR NUMBER 42 IS NONCOMPLIANT.
 916
 917 43 char        isdn4linux virtual modem
 918                  0 = /dev/ttyI0        First virtual modem
 919                    ...
 920                 63 = /dev/ttyI63       64th virtual modem
 921
 922 43 block       Network block devices
 923                  0 = /dev/nb0          First network block device
 924                  1 = /dev/nb1          Second network block device
 925                    ...
 926
 927                Network Block Device is somehow similar to loopback
 928                devices: If you read from it, it sends packet across
 929                network asking server for data. If you write to it, it
 930                sends packet telling server to write. It could be used
 931                to mounting filesystems over the net, swapping over
 932                the net, implementing block device in userland etc.
 933
 934 44 char        isdn4linux virtual modem - alternate devices
 935                  0 = /dev/cui0         Callout device for ttyI0
 936                    ...
 937                 63 = /dev/cui63        Callout device for ttyI63
 938
 939 44 block       Flash Translation Layer (FTL) filesystems
 940                  0 = /dev/ftla         FTL on first Memory Technology Device
 941                 16 = /dev/ftlb         FTL on second Memory Technology Device
 942                 32 = /dev/ftlc         FTL on third Memory Technology Device
 943                    ...
 944                240 = /dev/ftlp         FTL on 16th Memory Technology Device
 945
 946                Partitions are handled in the same way as for IDE
 947                disks (see major number 3) except that the partition
 948                limit is 15 rather than 63 per disk (same as SCSI.)
 949
 950 45 char        isdn4linux ISDN BRI driver
 951                  0 = /dev/isdn0        First virtual B channel raw data
 952                    ...
 953                 63 = /dev/isdn63       64th virtual B channel raw data
 954                 64 = /dev/isdnctrl0    First channel control/debug
 955                    ...
 956                127 = /dev/isdnctrl63   64th channel control/debug
 957
 958                128 = /dev/ippp0        First SyncPPP device
 959                    ...
 960                191 = /dev/ippp63       64th SyncPPP device
 961
 962                255 = /dev/isdninfo     ISDN monitor interface
 963
 964 45 block       Parallel port IDE disk devices
 965                  0 = /dev/pda          First parallel port IDE disk
 966                 16 = /dev/pdb          Second parallel port IDE disk
 967                 32 = /dev/pdc          Third parallel port IDE disk
 968                 48 = /dev/pdd          Fourth parallel port IDE disk
 969
 970                Partitions are handled in the same way as for IDE
 971                disks (see major number 3) except that the partition
 972                limit is 15 rather than 63 per disk.
 973
 974 46 char        Comtrol Rocketport serial card
 975                  0 = /dev/ttyR0        First Rocketport port
 976                  1 = /dev/ttyR1        Second Rocketport port
 977                    ...
 978 46 block       Parallel port ATAPI CD-ROM devices
 979                  0 = /dev/pcd0         First parallel port ATAPI CD-ROM
 980                  1 = /dev/pcd1         Second parallel port ATAPI CD-ROM
 981                  2 = /dev/pcd2         Third parallel port ATAPI CD-ROM
 982                  3 = /dev/pcd3         Fourth parallel port ATAPI CD-ROM
 983
 984 47 char        Comtrol Rocketport serial card - alternate devices
 985                  0 = /dev/cur0         Callout device for ttyR0
 986                  1 = /dev/cur1         Callout device for ttyR1
 987                    ...
 988 47 block       Parallel port ATAPI disk devices
 989                  0 = /dev/pf0          First parallel port ATAPI disk
 990                  1 = /dev/pf1          Second parallel port ATAPI disk
 991                  2 = /dev/pf2          Third parallel port ATAPI disk
 992                  3 = /dev/pf3          Fourth parallel port ATAPI disk
 993
 994                This driver is intended for floppy disks and similar
 995                devices and hence does not support partitioning.
 996
 997 48 char        SDL RISCom serial card
 998                  0 = /dev/ttyL0        First RISCom port
 999                  1 = /dev/ttyL1        Second RISCom port
1000                    ...
1001 48 block       Mylex DAC960 PCI RAID controller; first controller
1002                  0 = /dev/rd/c0d0      First disk, whole disk
1003                  8 = /dev/rd/c0d1      Second disk, whole disk
1004                    ...
1005                248 = /dev/rd/c0d31     32nd disk, whole disk
1006
1007                For partitions add:
1008                  0 = /dev/rd/c?d?      Whole disk
1009                  1 = /dev/rd/c?d?p1    First partition
1010                    ...
1011                  7 = /dev/rd/c?d?p7    Seventh partition
1012
1013 49 char        SDL RISCom serial card - alternate devices
1014                  0 = /dev/cul0         Callout device for ttyL0
1015                  1 = /dev/cul1         Callout device for ttyL1
1016                    ...
1017 49 block       Mylex DAC960 PCI RAID controller; second controller
1018                  0 = /dev/rd/c1d0      First disk, whole disk
1019                  8 = /dev/rd/c1d1      Second disk, whole disk
1020                    ...
1021                248 = /dev/rd/c1d31     32nd disk, whole disk
1022
1023                Partitions are handled as for major 48.
1024
1025 50 char        Reserved for GLINT
1026
1027 50 block       Mylex DAC960 PCI RAID controller; third controller
1028                  0 = /dev/rd/c2d0      First disk, whole disk
1029                  8 = /dev/rd/c2d1      Second disk, whole disk
1030                    ...
1031                248 = /dev/rd/c2d31     32nd disk, whole disk
1032
1033 51 char        Baycom radio modem OR Radio Tech BIM-XXX-RS232 radio modem
1034                  0 = /dev/bc0          First Baycom radio modem
1035                  1 = /dev/bc1          Second Baycom radio modem
1036                    ...
1037 51 block       Mylex DAC960 PCI RAID controller; fourth controller
1038                  0 = /dev/rd/c3d0      First disk, whole disk
1039                  8 = /dev/rd/c3d1      Second disk, whole disk
1040                    ...
1041                248 = /dev/rd/c3d31     32nd disk, whole disk
1042
1043                Partitions are handled as for major 48.
1044
1045 52 char        Spellcaster DataComm/BRI ISDN card
1046                  0 = /dev/dcbri0       First DataComm card
1047                  1 = /dev/dcbri1       Second DataComm card
1048                  2 = /dev/dcbri2       Third DataComm card
1049                  3 = /dev/dcbri3       Fourth DataComm card
1050
1051 52 block       Mylex DAC960 PCI RAID controller; fifth controller
1052                  0 = /dev/rd/c4d0      First disk, whole disk
1053                  8 = /dev/rd/c4d1      Second disk, whole disk
1054                    ...
1055                248 = /dev/rd/c4d31     32nd disk, whole disk
1056
1057                Partitions are handled as for major 48.
1058
1059 53 char        BDM interface for remote debugging MC683xx microcontrollers
1060                  0 = /dev/pd_bdm0      PD BDM interface on lp0
1061                  1 = /dev/pd_bdm1      PD BDM interface on lp1
1062                  2 = /dev/pd_bdm2      PD BDM interface on lp2
1063                  4 = /dev/icd_bdm0     ICD BDM interface on lp0
1064                  5 = /dev/icd_bdm1     ICD BDM interface on lp1
1065                  6 = /dev/icd_bdm2     ICD BDM interface on lp2
1066
1067                This device is used for the interfacing to the MC683xx
1068                microcontrollers via Background Debug Mode by use of a
1069                Parallel Port interface. PD is the Motorola Public
1070                Domain Interface and ICD is the commercial interface
1071                by P&E.
1072
1073 53 block       Mylex DAC960 PCI RAID controller; sixth controller
1074                  0 = /dev/rd/c5d0      First disk, whole disk
1075                  8 = /dev/rd/c5d1      Second disk, whole disk
1076                    ...
1077                248 = /dev/rd/c5d31     32nd disk, whole disk
1078
1079                Partitions are handled as for major 48.
1080
1081 54 char        Electrocardiognosis Holter serial card
1082                  0 = /dev/holter0      First Holter port
1083                  1 = /dev/holter1      Second Holter port
1084                  2 = /dev/holter2      Third Holter port
1085
1086                A custom serial card used by Electrocardiognosis SRL
1087                <mseritan@ottonel.pub.ro> to transfer data from Holter
1088                24-hour heart monitoring equipment.
1089
1090 54 block       Mylex DAC960 PCI RAID controller; seventh controller
1091                  0 = /dev/rd/c6d0      First disk, whole disk
1092                  8 = /dev/rd/c6d1      Second disk, whole disk
1093                    ...
1094                248 = /dev/rd/c6d31     32nd disk, whole disk
1095
1096                Partitions are handled as for major 48.
1097
1098 55 char        DSP56001 digital signal processor
1099                  0 = /dev/dsp56k       First DSP56001
1100
1101 55 block       Mylex DAC960 PCI RAID controller; eighth controller
1102                  0 = /dev/rd/c7d0      First disk, whole disk
1103                  8 = /dev/rd/c7d1      Second disk, whole disk
1104                    ...
1105                248 = /dev/rd/c7d31     32nd disk, whole disk
1106
1107                Partitions are handled as for major 48.
1108
1109 56 char        Apple Desktop Bus
1110                  0 = /dev/adb          ADB bus control
1111
1112                Additional devices will be added to this number, all
1113                starting with /dev/adb.
1114
1115 56 block       Fifth IDE hard disk/CD-ROM interface
1116                  0 = /dev/hdi          Master: whole disk (or CD-ROM)
1117                 64 = /dev/hdj          Slave: whole disk (or CD-ROM)
1118
1119                Partitions are handled the same way as for the first
1120                interface (see major number 3).
1121
1122 57 char        Hayes ESP serial card
1123                  0 = /dev/ttyP0        First ESP port
1124                  1 = /dev/ttyP1        Second ESP port
1125                    ...
1126
1127 57 block       Sixth IDE hard disk/CD-ROM interface
1128                  0 = /dev/hdk          Master: whole disk (or CD-ROM)
1129                 64 = /dev/hdl          Slave: whole disk (or CD-ROM)
1130
1131                Partitions are handled the same way as for the first
1132                interface (see major number 3).
1133
1134 58 char        Hayes ESP serial card - alternate devices
1135                  0 = /dev/cup0         Callout device for ttyP0
1136                  1 = /dev/cup1         Callout device for ttyP1
1137                    ...
1138
1139 58 block       Reserved for logical volume manager
1140
1141 59 char        sf firewall package
1142                  0 = /dev/firewall     Communication with sf kernel module
1143
1144 59 block       Generic PDA filesystem device
1145                  0 = /dev/pda0         First PDA device
1146                  1 = /dev/pda1         Second PDA device
1147                    ...
1148
1149                The pda devices are used to mount filesystems on
1150                remote pda's (basically slow handheld machines with
1151                proprietary OS's and limited memory and storage
1152                running small fs translation drivers) through serial /
1153                IRDA / parallel links.
1154
1155                NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc
1156
1157 60-63 char     LOCAL/EXPERIMENTAL USE
1158
1159 60-63 block    LOCAL/EXPERIMENTAL USE
1160                Allocated for local/experimental use.  For devices not
1161                assigned official numbers, these ranges should be
1162                used in order to avoid conflicting with future assignments.
1163
1164 64 char        ENskip kernel encryption package
1165                  0 = /dev/enskip       Communication with ENskip kernel module
1166
1167 64 block       Scramdisk/DriveCrypt encrypted devices
1168                  0 = /dev/scramdisk/master    Master node for ioctls
1169                  1 = /dev/scramdisk/1         First encrypted device
1170                  2 = /dev/scramdisk/2         Second encrypted device
1171                  ...
1172                255 = /dev/scramdisk/255       255th encrypted device
1173
1174                The filename of the encrypted container and the passwords
1175                are sent via ioctls (using the sdmount tool) to the master
1176                node which then activates them via one of the
1177                /dev/scramdisk/x nodes for loop mounting (all handled
1178                through the sdmount tool).
1179
1180                Requested by: andy@scramdisklinux.org
1181
1182 65 char        Sundance "plink" Transputer boards (obsolete, unused)
1183                  0 = /dev/plink0       First plink device
1184                  1 = /dev/plink1       Second plink device
1185                  2 = /dev/plink2       Third plink device
1186                  3 = /dev/plink3       Fourth plink device
1187                 64 = /dev/rplink0      First plink device, raw
1188                 65 = /dev/rplink1      Second plink device, raw
1189                 66 = /dev/rplink2      Third plink device, raw
1190                 67 = /dev/rplink3      Fourth plink device, raw
1191                128 = /dev/plink0d      First plink device, debug
1192                129 = /dev/plink1d      Second plink device, debug
1193                130 = /dev/plink2d      Third plink device, debug
1194                131 = /dev/plink3d      Fourth plink device, debug
1195                192 = /dev/rplink0d     First plink device, raw, debug
1196                193 = /dev/rplink1d     Second plink device, raw, debug
1197                194 = /dev/rplink2d     Third plink device, raw, debug
1198                195 = /dev/rplink3d     Fourth plink device, raw, debug
1199
1200                This is a commercial driver; contact James Howes
1201                <jth@prosig.demon.co.uk> for information.
1202
1203 65 block       SCSI disk devices (16-31)
1204                  0 = /dev/sdq          17th SCSI disk whole disk
1205                 16 = /dev/sdr          18th SCSI disk whole disk
1206                 32 = /dev/sds          19th SCSI disk whole disk
1207                    ...
1208                240 = /dev/sdaf         32nd SCSI disk whole disk
1209
1210                Partitions are handled in the same way as for IDE
1211                disks (see major number 3) except that the limit on
1212                partitions is 15.
1213
1214 66 char        YARC PowerPC PCI coprocessor card
1215                  0 = /dev/yppcpci0     First YARC card
1216                  1 = /dev/yppcpci1     Second YARC card
1217                    ...
1218
1219 66 block       SCSI disk devices (32-47)
1220                  0 = /dev/sdag         33th SCSI disk whole disk
1221                 16 = /dev/sdah         34th SCSI disk whole disk
1222                 32 = /dev/sdai         35th SCSI disk whole disk
1223                    ...
1224                240 = /dev/sdav         48nd SCSI disk whole disk
1225
1226                Partitions are handled in the same way as for IDE
1227                disks (see major number 3) except that the limit on
1228                partitions is 15.
1229
1230 67 char        Coda network file system
1231                  0 = /dev/cfs0         Coda cache manager
1232
1233                See http://www.coda.cs.cmu.edu for information about Coda.
1234
1235 67 block       SCSI disk devices (48-63)
1236                  0 = /dev/sdaw         49th SCSI disk whole disk
1237                 16 = /dev/sdax         50th SCSI disk whole disk
1238                 32 = /dev/sday         51st SCSI disk whole disk
1239                    ...
1240                240 = /dev/sdbl         64th SCSI disk whole disk
1241
1242                Partitions are handled in the same way as for IDE
1243                disks (see major number 3) except that the limit on
1244                partitions is 15.
1245
1246 68 char        CAPI 2.0 interface
1247                  0 = /dev/capi20       Control device
1248                  1 = /dev/capi20.00    First CAPI 2.0 application
1249                  2 = /dev/capi20.01    Second CAPI 2.0 application
1250                    ...
1251                 20 = /dev/capi20.19    19th CAPI 2.0 application
1252
1253                ISDN CAPI 2.0 driver for use with CAPI 2.0
1254                applications; currently supports the AVM B1 card.
1255
1256 68 block       SCSI disk devices (64-79)
1257                  0 = /dev/sdbm         65th SCSI disk whole disk
1258                 16 = /dev/sdbn         66th SCSI disk whole disk
1259                 32 = /dev/sdbo         67th SCSI disk whole disk
1260                    ...
1261                240 = /dev/sdcb         80th SCSI disk whole disk
1262
1263                Partitions are handled in the same way as for IDE
1264                disks (see major number 3) except that the limit on
1265                partitions is 15.
1266
1267 69 char        MA16 numeric accelerator card
1268                  0 = /dev/ma16         Board memory access
1269
1270 69 block       SCSI disk devices (80-95)
1271                  0 = /dev/sdcc         81st SCSI disk whole disk
1272                 16 = /dev/sdcd         82nd SCSI disk whole disk
1273                 32 = /dev/sdce         83th SCSI disk whole disk
1274                    ...
1275                240 = /dev/sdcr         96th SCSI disk whole disk
1276
1277                Partitions are handled in the same way as for IDE
1278                disks (see major number 3) except that the limit on
1279                partitions is 15.
1280
1281 70 char        SpellCaster Protocol Services Interface
1282                  0 = /dev/apscfg       Configuration interface
1283                  1 = /dev/apsauth      Authentication interface
1284                  2 = /dev/apslog       Logging interface
1285                  3 = /dev/apsdbg       Debugging interface
1286                 64 = /dev/apsisdn      ISDN command interface
1287                 65 = /dev/apsasync     Async command interface
1288                128 = /dev/apsmon       Monitor interface
1289
1290 70 block       SCSI disk devices (96-111)
1291                  0 = /dev/sdcs         97th SCSI disk whole disk
1292                 16 = /dev/sdct         98th SCSI disk whole disk
1293                 32 = /dev/sdcu         99th SCSI disk whole disk
1294                    ...
1295                240 = /dev/sddh         112nd SCSI disk whole disk
1296
1297                Partitions are handled in the same way as for IDE
1298                disks (see major number 3) except that the limit on
1299                partitions is 15.
1300
1301 71 char        Computone IntelliPort II serial card
1302                  0 = /dev/ttyF0        IntelliPort II board 0, port 0
1303                  1 = /dev/ttyF1        IntelliPort II board 0, port 1
1304                    ...
1305                 63 = /dev/ttyF63       IntelliPort II board 0, port 63
1306                 64 = /dev/ttyF64       IntelliPort II board 1, port 0
1307                 65 = /dev/ttyF65       IntelliPort II board 1, port 1
1308                    ...
1309                127 = /dev/ttyF127      IntelliPort II board 1, port 63
1310                128 = /dev/ttyF128      IntelliPort II board 2, port 0
1311                129 = /dev/ttyF129      IntelliPort II board 2, port 1
1312                    ...
1313                191 = /dev/ttyF191      IntelliPort II board 2, port 63
1314                192 = /dev/ttyF192      IntelliPort II board 3, port 0
1315                193 = /dev/ttyF193      IntelliPort II board 3, port 1
1316                    ...
1317                255 = /dev/ttyF255      IntelliPort II board 3, port 63
1318
1319 71 block       SCSI disk devices (112-127)
1320                  0 = /dev/sddi         113th SCSI disk whole disk
1321                 16 = /dev/sddj         114th SCSI disk whole disk
1322                 32 = /dev/sddk         115th SCSI disk whole disk
1323                    ...
1324                240 = /dev/sddx         128th SCSI disk whole disk
1325
1326                Partitions are handled in the same way as for IDE
1327                disks (see major number 3) except that the limit on
1328                partitions is 15.
1329
1330 72 char        Computone IntelliPort II serial card - alternate devices
1331                  0 = /dev/cuf0         Callout device for ttyF0
1332                  1 = /dev/cuf1         Callout device for ttyF1
1333                    ...
1334                 63 = /dev/cuf63        Callout device for ttyF63
1335                 64 = /dev/cuf64        Callout device for ttyF64
1336                 65 = /dev/cuf65        Callout device for ttyF65
1337                    ...
1338                127 = /dev/cuf127       Callout device for ttyF127
1339                128 = /dev/cuf128       Callout device for ttyF128
1340                129 = /dev/cuf129       Callout device for ttyF129
1341                    ...
1342                191 = /dev/cuf191       Callout device for ttyF191
1343                192 = /dev/cuf192       Callout device for ttyF192
1344                193 = /dev/cuf193       Callout device for ttyF193
1345                    ...
1346                255 = /dev/cuf255       Callout device for ttyF255
1347
1348 72 block       Compaq Intelligent Drive Array, first controller
1349                  0 = /dev/ida/c0d0     First logical drive whole disk
1350                 16 = /dev/ida/c0d1     Second logical drive whole disk
1351                    ...
1352                240 = /dev/ida/c0d15    16th logical drive whole disk
1353
1354                Partitions are handled the same way as for Mylex
1355                DAC960 (see major number 48) except that the limit on
1356                partitions is 15.
1357
1358 73 char        Computone IntelliPort II serial card - control devices
1359                  0 = /dev/ip2ipl0      Loadware device for board 0
1360                  1 = /dev/ip2stat0     Status device for board 0
1361                  4 = /dev/ip2ipl1      Loadware device for board 1
1362                  5 = /dev/ip2stat1     Status device for board 1
1363                  8 = /dev/ip2ipl2      Loadware device for board 2
1364                  9 = /dev/ip2stat2     Status device for board 2
1365                 12 = /dev/ip2ipl3      Loadware device for board 3
1366                 13 = /dev/ip2stat3     Status device for board 3
1367
1368 73 block       Compaq Intelligent Drive Array, second controller
1369                  0 = /dev/ida/c1d0     First logical drive whole disk
1370                 16 = /dev/ida/c1d1     Second logical drive whole disk
1371                    ...
1372                240 = /dev/ida/c1d15    16th logical drive whole disk
1373
1374                Partitions are handled the same way as for Mylex
1375                DAC960 (see major number 48) except that the limit on
1376                partitions is 15.
1377
1378 74 char        SCI bridge
1379                  0 = /dev/SCI/0        SCI device 0
1380                  1 = /dev/SCI/1        SCI device 1
1381                    ...
1382
1383                Currently for Dolphin Interconnect Solutions' PCI-SCI
1384                bridge.
1385
1386 74 block       Compaq Intelligent Drive Array, third controller
1387                  0 = /dev/ida/c2d0     First logical drive whole disk
1388                 16 = /dev/ida/c2d1     Second logical drive whole disk
1389                    ...
1390                240 = /dev/ida/c2d15    16th logical drive whole disk
1391
1392                Partitions are handled the same way as for Mylex
1393                DAC960 (see major number 48) except that the limit on
1394                partitions is 15.
1395
1396 75 char        Specialix IO8+ serial card
1397                  0 = /dev/ttyW0        First IO8+ port, first card
1398                  1 = /dev/ttyW1        Second IO8+ port, first card
1399                    ...
1400                  8 = /dev/ttyW8        First IO8+ port, second card
1401                    ...
1402
1403 75 block       Compaq Intelligent Drive Array, fourth controller
1404                  0 = /dev/ida/c3d0     First logical drive whole disk
1405                 16 = /dev/ida/c3d1     Second logical drive whole disk
1406                    ...
1407                240 = /dev/ida/c3d15    16th logical drive whole disk
1408
1409                Partitions are handled the same way as for Mylex
1410                DAC960 (see major number 48) except that the limit on
1411                partitions is 15.
1412
1413 76 char        Specialix IO8+ serial card - alternate devices
1414                  0 = /dev/cuw0         Callout device for ttyW0
1415                  1 = /dev/cuw1         Callout device for ttyW1
1416                    ...
1417                  8 = /dev/cuw8         Callout device for ttyW8
1418                    ...
1419
1420 76 block       Compaq Intelligent Drive Array, fifth controller
1421                  0 = /dev/ida/c4d0     First logical drive whole disk
1422                 16 = /dev/ida/c4d1     Second logical drive whole disk
1423                    ...
1424                240 = /dev/ida/c4d15    16th logical drive whole disk
1425
1426                Partitions are handled the same way as for Mylex
1427                DAC960 (see major number 48) except that the limit on
1428                partitions is 15.
1429
1430
1431 77 char        ComScire Quantum Noise Generator
1432                  0 = /dev/qng          ComScire Quantum Noise Generator
1433
1434 77 block       Compaq Intelligent Drive Array, sixth controller
1435                  0 = /dev/ida/c5d0     First logical drive whole disk
1436                 16 = /dev/ida/c5d1     Second logical drive whole disk
1437                    ...
1438                240 = /dev/ida/c5d15    16th logical drive whole disk
1439
1440                Partitions are handled the same way as for Mylex
1441                DAC960 (see major number 48) except that the limit on
1442                partitions is 15.
1443
1444 78 char        PAM Software's multimodem boards
1445                  0 = /dev/ttyM0        First PAM modem
1446                  1 = /dev/ttyM1        Second PAM modem
1447                    ...
1448
1449 78 block       Compaq Intelligent Drive Array, seventh controller
1450                  0 = /dev/ida/c6d0     First logical drive whole disk
1451                 16 = /dev/ida/c6d1     Second logical drive whole disk
1452                    ...
1453                240 = /dev/ida/c6d15    16th logical drive whole disk
1454
1455                Partitions are handled the same way as for Mylex
1456                DAC960 (see major number 48) except that the limit on
1457                partitions is 15.
1458
1459 79 char        PAM Software's multimodem boards - alternate devices
1460                  0 = /dev/cum0         Callout device for ttyM0
1461                  1 = /dev/cum1         Callout device for ttyM1
1462                    ...
1463
1464 79 block       Compaq Intelligent Drive Array, eighth controller
1465                  0 = /dev/ida/c7d0     First logical drive whole disk
1466                 16 = /dev/ida/c7d1     Second logical drive whole disk
1467                    ...
1468                240 = /dev/ida/c715     16th logical drive whole disk
1469
1470                Partitions are handled the same way as for Mylex
1471                DAC960 (see major number 48) except that the limit on
1472                partitions is 15.
1473
1474 80 char        Photometrics AT200 CCD camera
1475                  0 = /dev/at200        Photometrics AT200 CCD camera
1476
1477 80 block       I2O hard disk
1478                  0 = /dev/i2o/hda      First I2O hard disk, whole disk
1479                 16 = /dev/i2o/hdb      Second I2O hard disk, whole disk
1480                    ...
1481                240 = /dev/i2o/hdp      16th I2O hard disk, whole disk
1482
1483                Partitions are handled in the same way as for IDE
1484                disks (see major number 3) except that the limit on
1485                partitions is 15.
1486
1487 81 char        video4linux
1488                  0 = /dev/video0       Video capture/overlay device
1489                    ...
1490                 63 = /dev/video63      Video capture/overlay device
1491                 64 = /dev/radio0       Radio device
1492                    ...
1493                127 = /dev/radio63      Radio device
1494                224 = /dev/vbi0         Vertical blank interrupt
1495                    ...
1496                255 = /dev/vbi31        Vertical blank interrupt
1497
1498 81 block       I2O hard disk
1499                  0 = /dev/i2o/hdq      17th I2O hard disk, whole disk
1500                 16 = /dev/i2o/hdr      18th I2O hard disk, whole disk
1501                    ...
1502                240 = /dev/i2o/hdaf     32nd I2O hard disk, whole disk
1503
1504                Partitions are handled in the same way as for IDE
1505                disks (see major number 3) except that the limit on
1506                partitions is 15.
1507
1508 82 char        WiNRADiO communications receiver card
1509                  0 = /dev/winradio0    First WiNRADiO card
1510                  1 = /dev/winradio1    Second WiNRADiO card
1511                    ...
1512
1513                The driver and documentation may be obtained from
1514                http://www.winradio.com/
1515
1516 82 block       I2O hard disk
1517                  0 = /dev/i2o/hdag     33rd I2O hard disk, whole disk
1518                 16 = /dev/i2o/hdah     34th I2O hard disk, whole disk
1519                    ...
1520                240 = /dev/i2o/hdav     48th I2O hard disk, whole disk
1521
1522                Partitions are handled in the same way as for IDE
1523                disks (see major number 3) except that the limit on
1524                partitions is 15.
1525
1526 83 char        Matrox mga_vid video driver
1527                 0 = /dev/mga_vid0      1st video card
1528                 1 = /dev/mga_vid1      2nd video card
1529                 2 = /dev/mga_vid2      3rd video card
1530                  ...
1531                15 = /dev/mga_vid15     16th video card
1532
1533 83 block       I2O hard disk
1534                  0 = /dev/i2o/hdaw     49th I2O hard disk, whole disk
1535                 16 = /dev/i2o/hdax     50th I2O hard disk, whole disk
1536                    ...
1537                240 = /dev/i2o/hdbl     64th I2O hard disk, whole disk
1538
1539                Partitions are handled in the same way as for IDE
1540                disks (see major number 3) except that the limit on
1541                partitions is 15.
1542
1543 84 char        Ikon 1011[57] Versatec Greensheet Interface
1544                  0 = /dev/ihcp0        First Greensheet port
1545                  1 = /dev/ihcp1        Second Greensheet port
1546
1547 84 block       I2O hard disk
1548                  0 = /dev/i2o/hdbm     65th I2O hard disk, whole disk
1549                 16 = /dev/i2o/hdbn     66th I2O hard disk, whole disk
1550                    ...
1551                240 = /dev/i2o/hdcb     80th I2O hard disk, whole disk
1552
1553                Partitions are handled in the same way as for IDE
1554                disks (see major number 3) except that the limit on
1555                partitions is 15.
1556
1557 85 char        Linux/SGI shared memory input queue
1558                  0 = /dev/shmiq        Master shared input queue
1559                  1 = /dev/qcntl0       First device pushed
1560                  2 = /dev/qcntl1       Second device pushed
1561                    ...
1562
1563 85 block       I2O hard disk
1564                  0 = /dev/i2o/hdcc     81st I2O hard disk, whole disk
1565                 16 = /dev/i2o/hdcd     82nd I2O hard disk, whole disk
1566                    ...
1567                240 = /dev/i2o/hdcr     96th I2O hard disk, whole disk
1568
1569                Partitions are handled in the same way as for IDE
1570                disks (see major number 3) except that the limit on
1571                partitions is 15.
1572
1573 86 char        SCSI media changer
1574                  0 = /dev/sch0         First SCSI media changer
1575                  1 = /dev/sch1         Second SCSI media changer
1576                    ...
1577
1578 86 block       I2O hard disk
1579                  0 = /dev/i2o/hdcs     97th I2O hard disk, whole disk
1580                 16 = /dev/i2o/hdct     98th I2O hard disk, whole disk
1581                    ...
1582                240 = /dev/i2o/hddh     112th I2O hard disk, whole disk
1583
1584                Partitions are handled in the same way as for IDE
1585                disks (see major number 3) except that the limit on
1586                partitions is 15.
1587
1588 87 char        Sony Control-A1 stereo control bus
1589                  0 = /dev/controla0    First device on chain
1590                  1 = /dev/controla1    Second device on chain
1591                    ...
1592
1593 87 block       I2O hard disk
1594                  0 = /dev/i2o/hddi     113rd I2O hard disk, whole disk
1595                 16 = /dev/i2o/hddj     114th I2O hard disk, whole disk
1596                    ...
1597                240 = /dev/i2o/hddx     128th I2O hard disk, whole disk
1598
1599                Partitions are handled in the same way as for IDE
1600                disks (see major number 3) except that the limit on
1601                partitions is 15.
1602
1603 88 char        COMX synchronous serial card
1604                  0 = /dev/comx0        COMX channel 0
1605                  1 = /dev/comx1        COMX channel 1
1606                    ...
1607
1608 88 block       Seventh IDE hard disk/CD-ROM interface
1609                  0 = /dev/hdm          Master: whole disk (or CD-ROM)
1610                 64 = /dev/hdn          Slave: whole disk (or CD-ROM)
1611
1612                Partitions are handled the same way as for the first
1613                interface (see major number 3).
1614
1615 89 char        I2C bus interface
1616                  0 = /dev/i2c-0        First I2C adapter
1617                  1 = /dev/i2c-1        Second I2C adapter
1618                    ...
1619
1620 89 block       Eighth IDE hard disk/CD-ROM interface
1621                  0 = /dev/hdo          Master: whole disk (or CD-ROM)
1622                 64 = /dev/hdp          Slave: whole disk (or CD-ROM)
1623
1624                Partitions are handled the same way as for the first
1625                interface (see major number 3).
1626
1627 90 char        Memory Technology Device (RAM, ROM, Flash)
1628                  0 = /dev/mtd0         First MTD (rw)
1629                  1 = /dev/mtdr0        First MTD (ro)
1630                    ...
1631                 30 = /dev/mtd15        16th MTD (rw)
1632                 31 = /dev/mtdr15       16th MTD (ro)
1633
1634 90 block       Ninth IDE hard disk/CD-ROM interface
1635                  0 = /dev/hdq          Master: whole disk (or CD-ROM)
1636                 64 = /dev/hdr          Slave: whole disk (or CD-ROM)
1637
1638                Partitions are handled the same way as for the first
1639                interface (see major number 3).
1640
1641 91 char        CAN-Bus devices
1642                  0 = /dev/can0         First CAN-Bus controller
1643                  1 = /dev/can1         Second CAN-Bus controller
1644                    ...
1645
1646 91 block       Tenth IDE hard disk/CD-ROM interface
1647                  0 = /dev/hds          Master: whole disk (or CD-ROM)
1648                 64 = /dev/hdt          Slave: whole disk (or CD-ROM)
1649
1650                Partitions are handled the same way as for the first
1651                interface (see major number 3).
1652
1653 92 char        Reserved for ith Kommunikationstechnik MIC ISDN card
1654
1655 92 block       PPDD encrypted disk driver
1656                  0 = /dev/ppdd0        First encrypted disk
1657                  1 = /dev/ppdd1        Second encrypted disk
1658                    ...
1659
1660                Partitions are handled in the same way as for IDE
1661                disks (see major number 3) except that the limit on
1662                partitions is 15.
1663
1664 93 char
1665
1666 93 block       NAND Flash Translation Layer filesystem
1667                  0 = /dev/nftla        First NFTL layer
1668                 16 = /dev/nftlb        Second NFTL layer
1669                    ...
1670                240 = /dev/nftlp        16th NTFL layer
1671
1672 94 char
1673
1674 94 block       IBM S/390 DASD block storage
1675                  0 = /dev/dasda First DASD device, major
1676                  1 = /dev/dasda1 First DASD device, block 1
1677                  2 = /dev/dasda2 First DASD device, block 2
1678                  3 = /dev/dasda3 First DASD device, block 3
1679                  4 = /dev/dasdb Second DASD device, major
1680                  5 = /dev/dasdb1 Second DASD device, block 1
1681                  6 = /dev/dasdb2 Second DASD device, block 2
1682                  7 = /dev/dasdb3 Second DASD device, block 3
1683                    ...
1684
1685 95 char        IP filter
1686                  0 = /dev/ipl          Filter control device/log file
1687                  1 = /dev/ipnat        NAT control device/log file
1688                  2 = /dev/ipstate      State information log file
1689                  3 = /dev/ipauth       Authentication control device/log file
1690                    ...
1691
1692 96 char        Parallel port ATAPI tape devices
1693                  0 = /dev/pt0          First parallel port ATAPI tape
1694                  1 = /dev/pt1          Second parallel port ATAPI tape
1695                    ...
1696                128 = /dev/npt0         First p.p. ATAPI tape, no rewind
1697                129 = /dev/npt1         Second p.p. ATAPI tape, no rewind
1698                    ...
1699
1700 96 block       Inverse NAND Flash Translation Layer
1701                  0 = /dev/inftla First INFTL layer
1702                 16 = /dev/inftlb Second INFTL layer
1703                    ...
1704                240 = /dev/inftlp       16th INTFL layer
1705
1706 97 char        Parallel port generic ATAPI interface
1707                  0 = /dev/pg0          First parallel port ATAPI device
1708                  1 = /dev/pg1          Second parallel port ATAPI device
1709                  2 = /dev/pg2          Third parallel port ATAPI device
1710                  3 = /dev/pg3          Fourth parallel port ATAPI device
1711
1712                These devices support the same API as the generic SCSI
1713                devices.
1714
1715 98 char        Control and Measurement Device (comedi)
1716                  0 = /dev/comedi0      First comedi device
1717                  1 = /dev/comedi1      Second comedi device
1718                    ...
1719
1720                See http://stm.lbl.gov/comedi.
1721
1722 98 block       User-mode virtual block device
1723                  0 = /dev/ubda         First user-mode block device
1724                 16 = /dev/udbb         Second user-mode block device
1725                    ...
1726
1727                Partitions are handled in the same way as for IDE
1728                disks (see major number 3) except that the limit on
1729                partitions is 15.
1730
1731                This device is used by the user-mode virtual kernel port.
1732
1733 99 char        Raw parallel ports
1734                  0 = /dev/parport0     First parallel port
1735                  1 = /dev/parport1     Second parallel port
1736                    ...
1737
1738 99 block       JavaStation flash disk
1739                  0 = /dev/jsfd         JavaStation flash disk
1740
1741100 char        Telephony for Linux
1742                  0 = /dev/phone0       First telephony device
1743                  1 = /dev/phone1       Second telephony device
1744                    ...
1745
1746101 char        Motorola DSP 56xxx board
1747                  0 = /dev/mdspstat     Status information
1748                  1 = /dev/mdsp1        First DSP board I/O controls
1749                    ...
1750                 16 = /dev/mdsp16       16th DSP board I/O controls
1751
1752101 block       AMI HyperDisk RAID controller
1753                  0 = /dev/amiraid/ar0  First array whole disk
1754                 16 = /dev/amiraid/ar1  Second array whole disk
1755                    ...
1756                240 = /dev/amiraid/ar15 16th array whole disk
1757
1758                For each device, partitions are added as:
1759                  0 = /dev/amiraid/ar?    Whole disk
1760                  1 = /dev/amiraid/ar?p1  First partition
1761                  2 = /dev/amiraid/ar?p2  Second partition
1762                    ...
1763                 15 = /dev/amiraid/ar?p15 15th partition
1764
1765102 char
1766
1767102 block       Compressed block device
1768                  0 = /dev/cbd/a        First compressed block device, whole device
1769                 16 = /dev/cbd/b        Second compressed block device, whole device
1770                    ...
1771                240 = /dev/cbd/p        16th compressed block device, whole device
1772
1773                Partitions are handled in the same way as for IDE
1774                disks (see major number 3) except that the limit on
1775                partitions is 15.
1776
1777103 char        Arla network file system
1778                  0 = /dev/nnpfs0       First NNPFS device
1779                  1 = /dev/nnpfs1       Second NNPFS device
1780
1781                Arla is a free clone of the Andrew File System, AFS.
1782                The NNPFS device gives user mode filesystem
1783                implementations a kernel presence for caching and easy
1784                mounting.  For more information about the project,
1785                write to <arla-drinkers@stacken.kth.se> or see
1786                http://www.stacken.kth.se/project/arla/
1787
1788103 block       Audit device
1789                  0 = /dev/audit        Audit device
1790
1791104 char        Flash BIOS support
1792
1793104 block       Compaq Next Generation Drive Array, first controller
1794                  0 = /dev/cciss/c0d0   First logical drive, whole disk
1795                 16 = /dev/cciss/c0d1   Second logical drive, whole disk
1796                    ...
1797                240 = /dev/cciss/c0d15  16th logical drive, whole disk
1798
1799                Partitions are handled the same way as for Mylex
1800                DAC960 (see major number 48) except that the limit on
1801                partitions is 15.
1802
1803105 char        Comtrol VS-1000 serial controller
1804                  0 = /dev/ttyV0        First VS-1000 port
1805                  1 = /dev/ttyV1        Second VS-1000 port
1806                    ...
1807
1808105 block       Compaq Next Generation Drive Array, second controller
1809                  0 = /dev/cciss/c1d0   First logical drive, whole disk
1810                 16 = /dev/cciss/c1d1   Second logical drive, whole disk
1811                    ...
1812                240 = /dev/cciss/c1d15  16th logical drive, whole disk
1813
1814                Partitions are handled the same way as for Mylex
1815                DAC960 (see major number 48) except that the limit on
1816                partitions is 15.
1817
1818106 char        Comtrol VS-1000 serial controller - alternate devices
1819                  0 = /dev/cuv0         First VS-1000 port
1820                  1 = /dev/cuv1         Second VS-1000 port
1821                    ...
1822
1823106 block       Compaq Next Generation Drive Array, third controller
1824                  0 = /dev/cciss/c2d0   First logical drive, whole disk
1825                 16 = /dev/cciss/c2d1   Second logical drive, whole disk
1826                    ...
1827                240 = /dev/cciss/c2d15  16th logical drive, whole disk
1828
1829                Partitions are handled the same way as for Mylex
1830                DAC960 (see major number 48) except that the limit on
1831                partitions is 15.
1832
1833107 char        3Dfx Voodoo Graphics device
1834                  0 = /dev/3dfx         Primary 3Dfx graphics device
1835
1836107 block       Compaq Next Generation Drive Array, fourth controller
1837                  0 = /dev/cciss/c3d0   First logical drive, whole disk
1838                 16 = /dev/cciss/c3d1   Second logical drive, whole disk
1839                    ...
1840                240 = /dev/cciss/c3d15  16th logical drive, whole disk
1841
1842                Partitions are handled the same way as for Mylex
1843                DAC960 (see major number 48) except that the limit on
1844                partitions is 15.
1845
1846108 char        Device independent PPP interface
1847                  0 = /dev/ppp          Device independent PPP interface
1848
1849108 block       Compaq Next Generation Drive Array, fifth controller
1850                  0 = /dev/cciss/c4d0   First logical drive, whole disk
1851                 16 = /dev/cciss/c4d1   Second logical drive, whole disk
1852                    ...
1853                240 = /dev/cciss/c4d15  16th logical drive, whole disk
1854
1855                Partitions are handled the same way as for Mylex
1856                DAC960 (see major number 48) except that the limit on
1857                partitions is 15.
1858
1859109 char        Reserved for logical volume manager
1860
1861109 block       Compaq Next Generation Drive Array, sixth controller
1862                  0 = /dev/cciss/c5d0   First logical drive, whole disk
1863                 16 = /dev/cciss/c5d1   Second logical drive, whole disk
1864                    ...
1865                240 = /dev/cciss/c5d15  16th logical drive, whole disk
1866
1867                Partitions are handled the same way as for Mylex
1868                DAC960 (see major number 48) except that the limit on
1869                partitions is 15.
1870
1871110 char        miroMEDIA Surround board
1872                  0 = /dev/srnd0        First miroMEDIA Surround board
1873                  1 = /dev/srnd1        Second miroMEDIA Surround board
1874                    ...
1875
1876110 block       Compaq Next Generation Drive Array, seventh controller
1877                  0 = /dev/cciss/c6d0   First logical drive, whole disk
1878                 16 = /dev/cciss/c6d1   Second logical drive, whole disk
1879                    ...
1880                240 = /dev/cciss/c6d15  16th logical drive, whole disk
1881
1882                Partitions are handled the same way as for Mylex
1883                DAC960 (see major number 48) except that the limit on
1884                partitions is 15.
1885
1886111 char
1887
1888111 block       Compaq Next Generation Drive Array, eighth controller
1889                  0 = /dev/cciss/c7d0   First logical drive, whole disk
1890                 16 = /dev/cciss/c7d1   Second logical drive, whole disk
1891                    ...
1892                240 = /dev/cciss/c7d15  16th logical drive, whole disk
1893
1894                Partitions are handled the same way as for Mylex
1895                DAC960 (see major number 48) except that the limit on
1896                partitions is 15.
1897
1898112 char        ISI serial card
1899                  0 = /dev/ttyM0        First ISI port
1900                  1 = /dev/ttyM1        Second ISI port
1901                    ...
1902
1903                There is currently a device-naming conflict between
1904                these and PAM multimodems (major 78).
1905
1906112 block       IBM iSeries virtual disk
1907                  0 = /dev/iseries/vda  First virtual disk, whole disk
1908                  8 = /dev/iseries/vdb  Second virtual disk, whole disk
1909                    ...
1910                200 = /dev/iseries/vdz  26th virtual disk, whole disk
1911                208 = /dev/iseries/vdaa 27th virtual disk, whole disk
1912                    ...
1913                248 = /dev/iseries/vdaf 32nd virtual disk, whole disk
1914
1915                Partitions are handled in the same way as for IDE
1916                disks (see major number 3) except that the limit on
1917                partitions is 7.
1918
1919113 char        ISI serial card - alternate devices
1920                  0 = /dev/cum0         Callout device for ttyM0
1921                  1 = /dev/cum1         Callout device for ttyM1
1922                    ...
1923
1924113 block       IBM iSeries virtual CD-ROM
1925                  0 = /dev/iseries/vcda First virtual CD-ROM
1926                  1 = /dev/iseries/vcdb Second virtual CD-ROM
1927                    ...
1928
1929114 char        Picture Elements ISE board
1930                  0 = /dev/ise0         First ISE board
1931                  1 = /dev/ise1         Second ISE board
1932                    ...
1933                128 = /dev/isex0        Control node for first ISE board
1934                129 = /dev/isex1        Control node for second ISE board
1935                    ...
1936
1937                The ISE board is an embedded computer, optimized for
1938                image processing. The /dev/iseN nodes are the general
1939                I/O access to the board, the /dev/isex0 nodes command
1940                nodes used to control the board.
1941
1942114 block       IDE BIOS powered software RAID interfaces such as the
1943                Promise Fastrak
1944
1945                  0 = /dev/ataraid/d0
1946                  1 = /dev/ataraid/d0p1
1947                  2 = /dev/ataraid/d0p2
1948                  ...
1949                 16 = /dev/ataraid/d1
1950                 17 = /dev/ataraid/d1p1
1951                 18 = /dev/ataraid/d1p2
1952                  ...
1953                255 = /dev/ataraid/d15p15
1954
1955                Partitions are handled in the same way as for IDE
1956                disks (see major number 3) except that the limit on
1957                partitions is 15.
1958
1959115 char        TI link cable devices (115 was formerly the console driver speaker)
1960                  0 = /dev/tipar0    Parallel cable on first parallel port
1961                  ...
1962                  7 = /dev/tipar7    Parallel cable on seventh parallel port
1963
1964                  8 = /dev/tiser0    Serial cable on first serial port
1965                  ...
1966                 15 = /dev/tiser7    Serial cable on seventh serial port
1967
1968                 16 = /dev/tiusb0    First USB cable
1969                  ...
1970                 47 = /dev/tiusb31   32nd USB cable
1971
1972115 block       NetWare (NWFS) Devices (0-255)
1973
1974                The NWFS (NetWare) devices are used to present a
1975                collection of NetWare Mirror Groups or NetWare
1976                Partitions as a logical storage segment for
1977                use in mounting NetWare volumes.  A maximum of
1978                256 NetWare volumes can be supported in a single
1979                machine.
1980
1981                http://cgfa.telepac.pt/ftp2/kernel.org/linux/kernel/people/jmerkey/nwfs/
1982
1983                0 = /dev/nwfs/v0    First NetWare (NWFS) Logical Volume
1984                1 = /dev/nwfs/v1    Second NetWare (NWFS) Logical Volume
1985                2 = /dev/nwfs/v2    Third NetWare (NWFS) Logical Volume
1986                      ...
1987                255 = /dev/nwfs/v255    Last NetWare (NWFS) Logical Volume
1988
1989116 char        Advanced Linux Sound Driver (ALSA)
1990
1991116 block       MicroMemory battery backed RAM adapter (NVRAM)
1992                Supports 16 boards, 15 partitions each.
1993                Requested by neilb at cse.unsw.edu.au.
1994
1995                 0 = /dev/umem/d0      Whole of first board
1996                 1 = /dev/umem/d0p1    First partition of first board
1997                 2 = /dev/umem/d0p2    Second partition of first board
1998                15 = /dev/umem/d0p15   15th partition of first board
1999
2000                16 = /dev/umem/d1      Whole of second board
2001                17 = /dev/umem/d1p1    First partition of second board
2002                    ...
2003                255= /dev/umem/d15p15  15th partition of 16th board.
2004
2005117 char        COSA/SRP synchronous serial card
2006                  0 = /dev/cosa0c0      1st board, 1st channel
2007                  1 = /dev/cosa0c1      1st board, 2nd channel
2008                    ...
2009                 16 = /dev/cosa1c0      2nd board, 1st channel
2010                 17 = /dev/cosa1c1      2nd board, 2nd channel
2011                    ...
2012
2013117 block       Enterprise Volume Management System (EVMS)
2014
2015                The EVMS driver uses a layered, plug-in model to provide
2016                unparalleled flexibility and extensibility in managing
2017                storage.  This allows for easy expansion or customization
2018                of various levels of volume management.  Requested by
2019                Mark Peloquin (peloquin at us.ibm.com).
2020
2021                Note: EVMS populates and manages all the devnodes in
2022                /dev/evms.
2023
2024                http://sf.net/projects/evms
2025
2026                  0 = /dev/evms/block_device   EVMS block device
2027                  1 = /dev/evms/legacyname1    First EVMS legacy device
2028                  2 = /dev/evms/legacyname2    Second EVMS legacy device
2029                    ...
2030                    Both ranges can grow (down or up) until they meet.
2031                    ...
2032                254 = /dev/evms/EVMSname2      Second EVMS native device
2033                255 = /dev/evms/EVMSname1      First EVMS native device
2034
2035                Note: legacyname(s) are derived from the normal legacy
2036                device names.  For example, /dev/hda5 would become
2037                /dev/evms/hda5.
2038
2039118 char        IBM Cryptographic Accelerator
2040                  0 = /dev/ica  Virtual interface to all IBM Crypto Accelerators
2041                  1 = /dev/ica0 IBMCA Device 0
2042                  2 = /dev/ica1 IBMCA Device 1
2043                    ...
2044
2045119 char        VMware virtual network control
2046                  0 = /dev/vnet0        1st virtual network
2047                  1 = /dev/vnet1        2nd virtual network
2048                    ...
2049
2050120-127 char    LOCAL/EXPERIMENTAL USE
2051
2052120-127 block   LOCAL/EXPERIMENTAL USE
2053                Allocated for local/experimental use.  For devices not
2054                assigned official numbers, these ranges should be
2055                used in order to avoid conflicting with future assignments.
2056
2057128-135 char    Unix98 PTY masters
2058
2059                These devices should not have corresponding device
2060                nodes; instead they should be accessed through the
2061                /dev/ptmx cloning interface.
2062
2063128 block       SCSI disk devices (128-143)
2064                  0 = /dev/sddy         129th SCSI disk whole disk
2065                 16 = /dev/sddz         130th SCSI disk whole disk
2066                 32 = /dev/sdea         131th SCSI disk whole disk
2067                    ...
2068                240 = /dev/sden         144th SCSI disk whole disk
2069
2070                Partitions are handled in the same way as for IDE
2071                disks (see major number 3) except that the limit on
2072                partitions is 15.
2073
2074129 block       SCSI disk devices (144-159)
2075                  0 = /dev/sdeo         145th SCSI disk whole disk
2076                 16 = /dev/sdep         146th SCSI disk whole disk
2077                 32 = /dev/sdeq         147th SCSI disk whole disk
2078                    ...
2079                240 = /dev/sdfd         160th SCSI disk whole disk
2080
2081                Partitions are handled in the same way as for IDE
2082                disks (see major number 3) except that the limit on
2083                partitions is 15.
2084
2085130 char        (Misc devices)
2086
2087130 block       SCSI disk devices (160-175)
2088                  0 = /dev/sdfe         161st SCSI disk whole disk
2089                 16 = /dev/sdff         162nd SCSI disk whole disk
2090                 32 = /dev/sdfg         163rd SCSI disk whole disk
2091                    ...
2092                240 = /dev/sdft         176th SCSI disk whole disk
2093
2094                Partitions are handled in the same way as for IDE
2095                disks (see major number 3) except that the limit on
2096                partitions is 15.
2097
2098131 block       SCSI disk devices (176-191)
2099                  0 = /dev/sdfu         177th SCSI disk whole disk
2100                 16 = /dev/sdfv         178th SCSI disk whole disk
2101                 32 = /dev/sdfw         179th SCSI disk whole disk
2102                    ...
2103                240 = /dev/sdgj         192nd SCSI disk whole disk
2104
2105                Partitions are handled in the same way as for IDE
2106                disks (see major number 3) except that the limit on
2107                partitions is 15.
2108
2109132 block       SCSI disk devices (192-207)
2110                  0 = /dev/sdgk         193rd SCSI disk whole disk
2111                 16 = /dev/sdgl         194th SCSI disk whole disk
2112                 32 = /dev/sdgm         195th SCSI disk whole disk
2113                    ...
2114                240 = /dev/sdgz         208th SCSI disk whole disk
2115
2116                Partitions are handled in the same way as for IDE
2117                disks (see major number 3) except that the limit on
2118                partitions is 15.
2119
2120133 block       SCSI disk devices (208-223)
2121                  0 = /dev/sdha         209th SCSI disk whole disk
2122                 16 = /dev/sdhb         210th SCSI disk whole disk
2123                 32 = /dev/sdhc         211th SCSI disk whole disk
2124                    ...
2125                240 = /dev/sdhp         224th SCSI disk whole disk
2126
2127                Partitions are handled in the same way as for IDE
2128                disks (see major number 3) except that the limit on
2129                partitions is 15.
2130
2131134 block       SCSI disk devices (224-239)
2132                  0 = /dev/sdhq         225th SCSI disk whole disk
2133                 16 = /dev/sdhr         226th SCSI disk whole disk
2134                 32 = /dev/sdhs         227th SCSI disk whole disk
2135                    ...
2136                240 = /dev/sdif         240th SCSI disk whole disk
2137
2138                Partitions are handled in the same way as for IDE
2139                disks (see major number 3) except that the limit on
2140                partitions is 15.
2141
2142135 block       SCSI disk devices (240-255)
2143                  0 = /dev/sdig         241st SCSI disk whole disk
2144                 16 = /dev/sdih         242nd SCSI disk whole disk
2145                 32 = /dev/sdih         243rd SCSI disk whole disk
2146                    ...
2147                240 = /dev/sdiv         256th SCSI disk whole disk
2148
2149                Partitions are handled in the same way as for IDE
2150                disks (see major number 3) except that the limit on
2151                partitions is 15.
2152
2153136-143 char    Unix98 PTY slaves
2154                  0 = /dev/pts/0        First Unix98 pseudo-TTY
2155                  1 = /dev/pts/1        Second Unix98 pseudo-TTY
2156                    ...
2157
2158                These device nodes are automatically generated with
2159                the proper permissions and modes by mounting the
2160                devpts filesystem onto /dev/pts with the appropriate
2161                mount options (distribution dependent, however, on
2162                *most* distributions the appropriate options are
2163                "mode=0620,gid=<gid of the "tty" group>".)
2164
2165136 block       Mylex DAC960 PCI RAID controller; ninth controller
2166                  0 = /dev/rd/c8d0      First disk, whole disk
2167                  8 = /dev/rd/c8d1      Second disk, whole disk
2168                    ...
2169                248 = /dev/rd/c8d31     32nd disk, whole disk
2170
2171                Partitions are handled as for major 48.
2172
2173137 block       Mylex DAC960 PCI RAID controller; tenth controller
2174                  0 = /dev/rd/c9d0      First disk, whole disk
2175                  8 = /dev/rd/c9d1      Second disk, whole disk
2176                    ...
2177                248 = /dev/rd/c9d31     32nd disk, whole disk
2178
2179                Partitions are handled as for major 48.
2180
2181138 block       Mylex DAC960 PCI RAID controller; eleventh controller
2182                  0 = /dev/rd/c10d0     First disk, whole disk
2183                  8 = /dev/rd/c10d1     Second disk, whole disk
2184                    ...
2185                248 = /dev/rd/c10d31    32nd disk, whole disk
2186
2187                Partitions are handled as for major 48.
2188
2189139 block       Mylex DAC960 PCI RAID controller; twelfth controller
2190                  0 = /dev/rd/c11d0     First disk, whole disk
2191                  8 = /dev/rd/c11d1     Second disk, whole disk
2192                    ...
2193                248 = /dev/rd/c11d31    32nd disk, whole disk
2194
2195                Partitions are handled as for major 48.
2196
2197140 block       Mylex DAC960 PCI RAID controller; thirteenth controller
2198                  0 = /dev/rd/c12d0     First disk, whole disk
2199                  8 = /dev/rd/c12d1     Second disk, whole disk
2200                    ...
2201                248 = /dev/rd/c12d31    32nd disk, whole disk
2202
2203                Partitions are handled as for major 48.
2204
2205141 block       Mylex DAC960 PCI RAID controller; fourteenth controller
2206                  0 = /dev/rd/c13d0     First disk, whole disk
2207                  8 = /dev/rd/c13d1     Second disk, whole disk
2208                    ...
2209                248 = /dev/rd/c13d31    32nd disk, whole disk
2210
2211                Partitions are handled as for major 48.
2212
2213142 block       Mylex DAC960 PCI RAID controller; fifteenth controller
2214                  0 = /dev/rd/c14d0     First disk, whole disk
2215                  8 = /dev/rd/c14d1     Second disk, whole disk
2216                    ...
2217                248 = /dev/rd/c14d31    32nd disk, whole disk
2218
2219                Partitions are handled as for major 48.
2220
2221143 block       Mylex DAC960 PCI RAID controller; sixteenth controller
2222                  0 = /dev/rd/c15d0     First disk, whole disk
2223                  8 = /dev/rd/c15d1     Second disk, whole disk
2224                    ...
2225                248 = /dev/rd/c15d31    32nd disk, whole disk
2226
2227                Partitions are handled as for major 48.
2228
2229144 char        Encapsulated PPP
2230                  0 = /dev/pppox0       First PPP over Ethernet
2231                    ...
2232                 63 = /dev/pppox63      64th PPP over Ethernet
2233
2234                This is primarily used for ADSL.
2235
2236                The SST 5136-DN DeviceNet interface driver has been
2237                relocated to major 183 due to an unfortunate conflict.
2238
2239144 block       Expansion Area #1 for more non-device (e.g. NFS) mounts
2240                  0 = mounted device 256
2241                255 = mounted device 511
2242
2243145 char        SAM9407-based soundcard
2244                  0 = /dev/sam0_mixer
2245                  1 = /dev/sam0_sequencer
2246                  2 = /dev/sam0_midi00
2247                  3 = /dev/sam0_dsp
2248                  4 = /dev/sam0_audio
2249                  6 = /dev/sam0_sndstat
2250                 18 = /dev/sam0_midi01
2251                 34 = /dev/sam0_midi02
2252                 50 = /dev/sam0_midi03
2253                 64 = /dev/sam1_mixer
2254                    ...
2255                128 = /dev/sam2_mixer
2256                    ...
2257                192 = /dev/sam3_mixer
2258                    ...
2259
2260                Device functions match OSS, but offer a number of
2261                addons, which are sam9407 specific.  OSS can be
2262                operated simultaneously, taking care of the codec.
2263
2264145 block       Expansion Area #2 for more non-device (e.g. NFS) mounts
2265                  0 = mounted device 512
2266                255 = mounted device 767
2267
2268146 char        SYSTRAM SCRAMNet mirrored-memory network
2269                  0 = /dev/scramnet0    First SCRAMNet device
2270                  1 = /dev/scramnet1    Second SCRAMNet device
2271                    ...
2272
2273146 block       Expansion Area #3 for more non-device (e.g. NFS) mounts
2274                  0 = mounted device 768
2275                255 = mounted device 1023
2276
2277147 char        Aureal Semiconductor Vortex Audio device
2278                  0 = /dev/aureal0      First Aureal Vortex
2279                  1 = /dev/aureal1      Second Aureal Vortex
2280                    ...
2281
2282147 block       Distributed Replicated Block Device (DRBD)
2283                  0 = /dev/drbd0        First DRBD device
2284                  1 = /dev/drbd1        Second DRBD device
2285                    ...
2286
2287148 char        Technology Concepts serial card
2288                  0 = /dev/ttyT0        First TCL port
2289                  1 = /dev/ttyT1        Second TCL port
2290                    ...
2291
2292149 char        Technology Concepts serial card - alternate devices
2293                  0 = /dev/cut0         Callout device for ttyT0
2294                  1 = /dev/cut0         Callout device for ttyT1
2295                    ...
2296
2297150 char        Real-Time Linux FIFOs
2298                  0 = /dev/rtf0         First RTLinux FIFO
2299                  1 = /dev/rtf1         Second RTLinux FIFO
2300                    ...
2301
2302151 char        DPT I2O SmartRaid V controller
2303                  0 = /dev/dpti0        First DPT I2O adapter
2304                  1 = /dev/dpti1        Second DPT I2O adapter
2305                    ...
2306
2307152 char        EtherDrive Control Device
2308                  0 = /dev/etherd/ctl   Connect/Disconnect an EtherDrive
2309                  1 = /dev/etherd/err   Monitor errors
2310                  2 = /dev/etherd/raw   Raw AoE packet monitor
2311
2312152 block       EtherDrive Block Devices
2313                  0 = /dev/etherd/0     EtherDrive 0
2314                    ...
2315                255 = /dev/etherd/255   EtherDrive 255
2316
2317153 char        SPI Bus Interface (sometimes referred to as MicroWire)
2318                  0 = /dev/spi0         First SPI device on the bus
2319                  1 = /dev/spi1         Second SPI device on the bus
2320                    ...
2321                 15 = /dev/spi15        Sixteenth SPI device on the bus
2322
2323153 block       Enhanced Metadisk RAID (EMD) storage units
2324                  0 = /dev/emd/0        First unit
2325                  1 = /dev/emd/0p1      Partition 1 on First unit
2326                  2 = /dev/emd/0p2      Partition 2 on First unit
2327                    ...
2328                 15 = /dev/emd/0p15     Partition 15 on First unit
2329
2330                 16 = /dev/emd/1        Second unit
2331                 32 = /dev/emd/2        Third unit
2332                    ...
2333                240 = /dev/emd/15       Sixteenth unit
2334
2335                Partitions are handled in the same way as for IDE
2336                disks (see major number 3) except that the limit on
2337                partitions is 15.
2338
2339154 char        Specialix RIO serial card
2340                  0 = /dev/ttySR0       First RIO port
2341                    ...
2342                255 = /dev/ttySR255     256th RIO port
2343
2344155 char        Specialix RIO serial card - alternate devices
2345                  0 = /dev/cusr0        Callout device for ttySR0
2346                    ...
2347                255 = /dev/cusr255      Callout device for ttySR255
2348
2349156 char        Specialix RIO serial card
2350                  0 = /dev/ttySR256     257th RIO port
2351                    ...
2352                255 = /dev/ttySR511     512th RIO port
2353
2354157 char        Specialix RIO serial card - alternate devices
2355                  0 = /dev/cusr256      Callout device for ttySR256
2356                    ...
2357                255 = /dev/cusr511      Callout device for ttySR511
2358
2359158 char        Dialogic GammaLink fax driver
2360                  0 = /dev/gfax0        GammaLink channel 0
2361                  1 = /dev/gfax1        GammaLink channel 1
2362                    ...
2363
2364159 char        RESERVED
2365
2366159 block       RESERVED
2367
2368160 char        General Purpose Instrument Bus (GPIB)
2369                  0 = /dev/gpib0        First GPIB bus
2370                  1 = /dev/gpib1        Second GPIB bus
2371                    ...
2372
2373160 block       Carmel 8-port SATA Disks on First Controller
2374                  0 = /dev/carmel/0     SATA disk 0 whole disk
2375                  1 = /dev/carmel/0p1   SATA disk 0 partition 1
2376                    ...
2377                 31 = /dev/carmel/0p31  SATA disk 0 partition 31
2378
2379                 32 = /dev/carmel/1     SATA disk 1 whole disk
2380                 64 = /dev/carmel/2     SATA disk 2 whole disk
2381                    ...
2382                224 = /dev/carmel/7     SATA disk 7 whole disk
2383
2384                Partitions are handled in the same way as for IDE
2385                disks (see major number 3) except that the limit on
2386                partitions is 31.
2387
2388161 char        IrCOMM devices (IrDA serial/parallel emulation)
2389                  0 = /dev/ircomm0      First IrCOMM device
2390                  1 = /dev/ircomm1      Second IrCOMM device
2391                    ...
2392                 16 = /dev/irlpt0       First IrLPT device
2393                 17 = /dev/irlpt1       Second IrLPT device
2394                    ...
2395
2396161 block       Carmel 8-port SATA Disks on Second Controller
2397                  0 = /dev/carmel/8     SATA disk 8 whole disk
2398                  1 = /dev/carmel/8p1   SATA disk 8 partition 1
2399                    ...
2400                 31 = /dev/carmel/8p31  SATA disk 8 partition 31
2401
2402                 32 = /dev/carmel/9     SATA disk 9 whole disk
2403                 64 = /dev/carmel/10    SATA disk 10 whole disk
2404                    ...
2405                224 = /dev/carmel/15    SATA disk 15 whole disk
2406
2407                Partitions are handled in the same way as for IDE
2408                disks (see major number 3) except that the limit on
2409                partitions is 31.
2410
2411162 char        Raw block device interface
2412                  0 = /dev/rawctl       Raw I/O control device
2413                  1 = /dev/raw/raw1     First raw I/O device
2414                  2 = /dev/raw/raw2     Second raw I/O device
2415                    ...
2416                 max minor number of raw device is set by kernel config
2417                 MAX_RAW_DEVS or raw module parameter 'max_raw_devs'
2418
2419163 char
2420
2421164 char        Chase Research AT/PCI-Fast serial card
2422                  0 = /dev/ttyCH0       AT/PCI-Fast board 0, port 0
2423                    ...
2424                 15 = /dev/ttyCH15      AT/PCI-Fast board 0, port 15
2425                 16 = /dev/ttyCH16      AT/PCI-Fast board 1, port 0
2426                    ...
2427                 31 = /dev/ttyCH31      AT/PCI-Fast board 1, port 15
2428                 32 = /dev/ttyCH32      AT/PCI-Fast board 2, port 0
2429                    ...
2430                 47 = /dev/ttyCH47      AT/PCI-Fast board 2, port 15
2431                 48 = /dev/ttyCH48      AT/PCI-Fast board 3, port 0
2432                    ...
2433                 63 = /dev/ttyCH63      AT/PCI-Fast board 3, port 15
2434
2435165 char        Chase Research AT/PCI-Fast serial card - alternate devices
2436                  0 = /dev/cuch0        Callout device for ttyCH0
2437                    ...
2438                 63 = /dev/cuch63       Callout device for ttyCH63
2439
2440166 char        ACM USB modems
2441                  0 = /dev/ttyACM0      First ACM modem
2442                  1 = /dev/ttyACM1      Second ACM modem
2443                    ...
2444
2445167 char        ACM USB modems - alternate devices
2446                  0 = /dev/cuacm0       Callout device for ttyACM0
2447                  1 = /dev/cuacm1       Callout device for ttyACM1
2448                    ...
2449
2450168 char        Eracom CSA7000 PCI encryption adaptor
2451                  0 = /dev/ecsa0        First CSA7000
2452                  1 = /dev/ecsa1        Second CSA7000
2453                    ...
2454
2455169 char        Eracom CSA8000 PCI encryption adaptor
2456                  0 = /dev/ecsa8-0      First CSA8000
2457                  1 = /dev/ecsa8-1      Second CSA8000
2458                    ...
2459
2460170 char        AMI MegaRAC remote access controller
2461                  0 = /dev/megarac0     First MegaRAC card
2462                  1 = /dev/megarac1     Second MegaRAC card
2463                    ...
2464
2465171 char        Reserved for IEEE 1394 (Firewire)
2466
2467172 char        Moxa Intellio serial card
2468                  0 = /dev/ttyMX0       First Moxa port
2469                  1 = /dev/ttyMX1       Second Moxa port
2470                    ...
2471                127 = /dev/ttyMX127     128th Moxa port
2472                128 = /dev/moxactl      Moxa control port
2473
2474173 char        Moxa Intellio serial card - alternate devices
2475                  0 = /dev/cumx0        Callout device for ttyMX0
2476                  1 = /dev/cumx1        Callout device for ttyMX1
2477                    ...
2478                127 = /dev/cumx127      Callout device for ttyMX127
2479
2480174 char        SmartIO serial card
2481                  0 = /dev/ttySI0       First SmartIO port
2482                  1 = /dev/ttySI1       Second SmartIO port
2483                    ...
2484
2485175 char        SmartIO serial card - alternate devices
2486                  0 = /dev/cusi0        Callout device for ttySI0
2487                  1 = /dev/cusi1        Callout device for ttySI1
2488                    ...
2489
2490176 char        nCipher nFast PCI crypto accelerator
2491                  0 = /dev/nfastpci0    First nFast PCI device
2492                  1 = /dev/nfastpci1    First nFast PCI device
2493                    ...
2494
2495177 char        TI PCILynx memory spaces
2496                  0 = /dev/pcilynx/aux0  AUX space of first PCILynx card
2497                    ...
2498                 15 = /dev/pcilynx/aux15 AUX space of 16th PCILynx card
2499                 16 = /dev/pcilynx/rom0  ROM space of first PCILynx card
2500                    ...
2501                 31 = /dev/pcilynx/rom15 ROM space of 16th PCILynx card
2502                 32 = /dev/pcilynx/ram0  RAM space of first PCILynx card
2503                    ...
2504                 47 = /dev/pcilynx/ram15 RAM space of 16th PCILynx card
2505
2506178 char        Giganet cLAN1xxx virtual interface adapter
2507                  0 = /dev/clanvi0      First cLAN adapter
2508                  1 = /dev/clanvi1      Second cLAN adapter
2509                    ...
2510
2511179 block       MMC block devices
2512                  0 = /dev/mmcblk0      First SD/MMC card
2513                  1 = /dev/mmcblk0p1    First partition on first MMC card
2514                  8 = /dev/mmcblk1      Second SD/MMC card
2515                    ...
2516
2517                The start of next SD/MMC card can be configured with
2518                CONFIG_MMC_BLOCK_MINORS, or overridden at boot/modprobe
2519                time using the mmcblk.perdev_minors option. That would
2520                bump the offset between each card to be the configured
2521                value instead of the default 8.
2522
2523179 char        CCube DVXChip-based PCI products
2524                  0 = /dev/dvxirq0      First DVX device
2525                  1 = /dev/dvxirq1      Second DVX device
2526                    ...
2527
2528180 char        USB devices
2529                  0 = /dev/usb/lp0      First USB printer
2530                    ...
2531                 15 = /dev/usb/lp15     16th USB printer
2532                 48 = /dev/usb/scanner0 First USB scanner
2533                    ...
2534                 63 = /dev/usb/scanner15 16th USB scanner
2535                 64 = /dev/usb/rio500   Diamond Rio 500
2536                 65 = /dev/usb/usblcd   USBLCD Interface (info@usblcd.de)
2537                 66 = /dev/usb/cpad0    Synaptics cPad (mouse/LCD)
2538                 96 = /dev/usb/hiddev0  1st USB HID device
2539                    ...
2540                111 = /dev/usb/hiddev15 16th USB HID device
2541                112 = /dev/usb/auer0    1st auerswald ISDN device
2542                    ...
2543                127 = /dev/usb/auer15   16th auerswald ISDN device
2544                128 = /dev/usb/brlvgr0  First Braille Voyager device
2545                    ...
2546                131 = /dev/usb/brlvgr3  Fourth Braille Voyager device
2547                132 = /dev/usb/idmouse  ID Mouse (fingerprint scanner) device
2548                133 = /dev/usb/sisusbvga1       First SiSUSB VGA device
2549                    ...
2550                140 = /dev/usb/sisusbvga8       Eighth SISUSB VGA device
2551                144 = /dev/usb/lcd      USB LCD device
2552                160 = /dev/usb/legousbtower0    1st USB Legotower device
2553                    ...
2554                175 = /dev/usb/legousbtower15   16th USB Legotower device
2555                176 = /dev/usb/usbtmc1  First USB TMC device
2556                   ...
2557                191 = /dev/usb/usbtmc16 16th USB TMC device
2558                192 = /dev/usb/yurex1   First USB Yurex device
2559                   ...
2560                209 = /dev/usb/yurex16  16th USB Yurex device
2561
2562180 block       USB block devices
2563                  0 = /dev/uba          First USB block device
2564                  8 = /dev/ubb          Second USB block device
2565                 16 = /dev/ubc          Third USB block device
2566                    ...
2567
2568181 char        Conrad Electronic parallel port radio clocks
2569                  0 = /dev/pcfclock0    First Conrad radio clock
2570                  1 = /dev/pcfclock1    Second Conrad radio clock
2571                    ...
2572
2573182 char        Picture Elements THR2 binarizer
2574                  0 = /dev/pethr0       First THR2 board
2575                  1 = /dev/pethr1       Second THR2 board
2576                    ...
2577
2578183 char        SST 5136-DN DeviceNet interface
2579                  0 = /dev/ss5136dn0    First DeviceNet interface
2580                  1 = /dev/ss5136dn1    Second DeviceNet interface
2581                    ...
2582
2583                This device used to be assigned to major number 144.
2584                It had to be moved due to an unfortunate conflict.
2585
2586184 char        Picture Elements' video simulator/sender
2587                  0 = /dev/pevss0       First sender board
2588                  1 = /dev/pevss1       Second sender board
2589                    ...
2590
2591185 char        InterMezzo high availability file system
2592                  0 = /dev/intermezzo0  First cache manager
2593                  1 = /dev/intermezzo1  Second cache manager
2594                    ...
2595
2596                See http://web.archive.org/web/20080115195241/
2597                http://inter-mezzo.org/index.html
2598
2599186 char        Object-based storage control device
2600                  0 = /dev/obd0         First obd control device
2601                  1 = /dev/obd1         Second obd control device
2602                    ...
2603
2604                See ftp://ftp.lustre.org/pub/obd for code and information.
2605
2606187 char        DESkey hardware encryption device
2607                  0 = /dev/deskey0      First DES key
2608                  1 = /dev/deskey1      Second DES key
2609                    ...
2610
2611188 char        USB serial converters
2612                  0 = /dev/ttyUSB0      First USB serial converter
2613                  1 = /dev/ttyUSB1      Second USB serial converter
2614                    ...
2615
2616189 char        USB serial converters - alternate devices
2617                  0 = /dev/cuusb0       Callout device for ttyUSB0
2618                  1 = /dev/cuusb1       Callout device for ttyUSB1
2619                    ...
2620
2621190 char        Kansas City tracker/tuner card
2622                  0 = /dev/kctt0        First KCT/T card
2623                  1 = /dev/kctt1        Second KCT/T card
2624                    ...
2625
2626191 char        Reserved for PCMCIA
2627
2628192 char        Kernel profiling interface
2629                  0 = /dev/profile      Profiling control device
2630                  1 = /dev/profile0     Profiling device for CPU 0
2631                  2 = /dev/profile1     Profiling device for CPU 1
2632                    ...
2633
2634193 char        Kernel event-tracing interface
2635                  0 = /dev/trace        Tracing control device
2636                  1 = /dev/trace0       Tracing device for CPU 0
2637                  2 = /dev/trace1       Tracing device for CPU 1
2638                    ...
2639
2640194 char        linVideoStreams (LINVS)
2641                  0 = /dev/mvideo/status0       Video compression status
2642                  1 = /dev/mvideo/stream0       Video stream
2643                  2 = /dev/mvideo/frame0        Single compressed frame
2644                  3 = /dev/mvideo/rawframe0     Raw uncompressed frame
2645                  4 = /dev/mvideo/codec0        Direct codec access
2646                  5 = /dev/mvideo/video4linux0  Video4Linux compatibility
2647
2648                 16 = /dev/mvideo/status1       Second device
2649                    ...
2650                 32 = /dev/mvideo/status2       Third device
2651                    ...
2652                    ...
2653                240 = /dev/mvideo/status15      16th device
2654                    ...
2655
2656195 char        Nvidia graphics devices
2657                  0 = /dev/nvidia0              First Nvidia card
2658                  1 = /dev/nvidia1              Second Nvidia card
2659                    ...
2660                255 = /dev/nvidiactl            Nvidia card control device
2661
2662196 char        Tormenta T1 card
2663                  0 = /dev/tor/0                Master control channel for all cards
2664                  1 = /dev/tor/1                First DS0
2665                  2 = /dev/tor/2                Second DS0
2666                    ...
2667                 48 = /dev/tor/48               48th DS0
2668                 49 = /dev/tor/49               First pseudo-channel
2669                 50 = /dev/tor/50               Second pseudo-channel
2670                    ...
2671
2672197 char        OpenTNF tracing facility
2673                  0 = /dev/tnf/t0               Trace 0 data extraction
2674                  1 = /dev/tnf/t1               Trace 1 data extraction
2675                    ...
2676                128 = /dev/tnf/status           Tracing facility status
2677                130 = /dev/tnf/trace            Tracing device
2678
2679198 char        Total Impact TPMP2 quad coprocessor PCI card
2680                  0 = /dev/tpmp2/0              First card
2681                  1 = /dev/tpmp2/1              Second card
2682                    ...
2683
2684199 char        Veritas volume manager (VxVM) volumes
2685                  0 = /dev/vx/rdsk/*/*          First volume
2686                  1 = /dev/vx/rdsk/*/*          Second volume
2687                    ...
2688
2689199 block       Veritas volume manager (VxVM) volumes
2690                  0 = /dev/vx/dsk/*/*           First volume
2691                  1 = /dev/vx/dsk/*/*           Second volume
2692                    ...
2693
2694                The namespace in these directories is maintained by
2695                the user space VxVM software.
2696
2697200 char        Veritas VxVM configuration interface
2698                  0 = /dev/vx/config            Configuration access node
2699                  1 = /dev/vx/trace             Volume i/o trace access node
2700                  2 = /dev/vx/iod               Volume i/o daemon access node
2701                  3 = /dev/vx/info              Volume information access node
2702                  4 = /dev/vx/task              Volume tasks access node
2703                  5 = /dev/vx/taskmon           Volume tasks monitor daemon
2704
2705201 char        Veritas VxVM dynamic multipathing driver
2706                  0 = /dev/vx/rdmp/*            First multipath device
2707                  1 = /dev/vx/rdmp/*            Second multipath device
2708                    ...
2709201 block       Veritas VxVM dynamic multipathing driver
2710                  0 = /dev/vx/dmp/*             First multipath device
2711                  1 = /dev/vx/dmp/*             Second multipath device
2712                    ...
2713
2714                The namespace in these directories is maintained by
2715                the user space VxVM software.
2716
2717202 char        CPU model-specific registers
2718                  0 = /dev/cpu/0/msr            MSRs on CPU 0
2719                  1 = /dev/cpu/1/msr            MSRs on CPU 1
2720                    ...
2721
2722202 block       Xen Virtual Block Device
2723                  0 = /dev/xvda       First Xen VBD whole disk
2724                  16 = /dev/xvdb      Second Xen VBD whole disk
2725                  32 = /dev/xvdc      Third Xen VBD whole disk
2726                    ...
2727                  240 = /dev/xvdp     Sixteenth Xen VBD whole disk
2728
2729                Partitions are handled in the same way as for IDE
2730                disks (see major number 3) except that the limit on
2731                partitions is 15.
2732
2733203 char        CPU CPUID information
2734                  0 = /dev/cpu/0/cpuid          CPUID on CPU 0
2735                  1 = /dev/cpu/1/cpuid          CPUID on CPU 1
2736                    ...
2737
2738204 char        Low-density serial ports
2739                  0 = /dev/ttyLU0               LinkUp Systems L72xx UART - port 0
2740                  1 = /dev/ttyLU1               LinkUp Systems L72xx UART - port 1
2741                  2 = /dev/ttyLU2               LinkUp Systems L72xx UART - port 2
2742                  3 = /dev/ttyLU3               LinkUp Systems L72xx UART - port 3
2743                  4 = /dev/ttyFB0               Intel Footbridge (ARM)
2744                  5 = /dev/ttySA0               StrongARM builtin serial port 0
2745                  6 = /dev/ttySA1               StrongARM builtin serial port 1
2746                  7 = /dev/ttySA2               StrongARM builtin serial port 2
2747                  8 = /dev/ttySC0               SCI serial port (SuperH) - port 0
2748                  9 = /dev/ttySC1               SCI serial port (SuperH) - port 1
2749                 10 = /dev/ttySC2               SCI serial port (SuperH) - port 2
2750                 11 = /dev/ttySC3               SCI serial port (SuperH) - port 3
2751                 12 = /dev/ttyFW0               Firmware console - port 0
2752                 13 = /dev/ttyFW1               Firmware console - port 1
2753                 14 = /dev/ttyFW2               Firmware console - port 2
2754                 15 = /dev/ttyFW3               Firmware console - port 3
2755                 16 = /dev/ttyAM0               ARM "AMBA" serial port 0
2756                    ...
2757                 31 = /dev/ttyAM15              ARM "AMBA" serial port 15
2758                 32 = /dev/ttyDB0               DataBooster serial port 0
2759                    ...
2760                 39 = /dev/ttyDB7               DataBooster serial port 7
2761                 40 = /dev/ttySG0               SGI Altix console port
2762                 41 = /dev/ttySMX0              Motorola i.MX - port 0
2763                 42 = /dev/ttySMX1              Motorola i.MX - port 1
2764                 43 = /dev/ttySMX2              Motorola i.MX - port 2
2765                 44 = /dev/ttyMM0               Marvell MPSC - port 0
2766                 45 = /dev/ttyMM1               Marvell MPSC - port 1
2767                 46 = /dev/ttyCPM0              PPC CPM (SCC or SMC) - port 0
2768                    ...
2769                 47 = /dev/ttyCPM5              PPC CPM (SCC or SMC) - port 5
2770                 50 = /dev/ttyIOC0              Altix serial card
2771                    ...
2772                 81 = /dev/ttyIOC31             Altix serial card
2773                 82 = /dev/ttyVR0               NEC VR4100 series SIU
2774                 83 = /dev/ttyVR1               NEC VR4100 series DSIU
2775                 84 = /dev/ttyIOC84             Altix ioc4 serial card
2776                    ...
2777                 115 = /dev/ttyIOC115           Altix ioc4 serial card
2778                 116 = /dev/ttySIOC0            Altix ioc3 serial card
2779                    ...
2780                 147 = /dev/ttySIOC31           Altix ioc3 serial card
2781                 148 = /dev/ttyPSC0             PPC PSC - port 0
2782                    ...
2783                 153 = /dev/ttyPSC5             PPC PSC - port 5
2784                 154 = /dev/ttyAT0              ATMEL serial port 0
2785                    ...
2786                 169 = /dev/ttyAT15             ATMEL serial port 15
2787                 170 = /dev/ttyNX0              Hilscher netX serial port 0
2788                    ...
2789                 185 = /dev/ttyNX15             Hilscher netX serial port 15
2790                 186 = /dev/ttyJ0               JTAG1 DCC protocol based serial port emulation
2791                 187 = /dev/ttyUL0              Xilinx uartlite - port 0
2792                    ...
2793                 190 = /dev/ttyUL3              Xilinx uartlite - port 3
2794                 191 = /dev/xvc0                Xen virtual console - port 0
2795                 192 = /dev/ttyPZ0              pmac_zilog - port 0
2796                    ...
2797                 195 = /dev/ttyPZ3              pmac_zilog - port 3
2798                 196 = /dev/ttyTX0              TX39/49 serial port 0
2799                    ...
2800                 204 = /dev/ttyTX7              TX39/49 serial port 7
2801                 205 = /dev/ttySC0              SC26xx serial port 0
2802                 206 = /dev/ttySC1              SC26xx serial port 1
2803                 207 = /dev/ttySC2              SC26xx serial port 2
2804                 208 = /dev/ttySC3              SC26xx serial port 3
2805                 209 = /dev/ttyMAX0             MAX3100 serial port 0
2806                 210 = /dev/ttyMAX1             MAX3100 serial port 1
2807                 211 = /dev/ttyMAX2             MAX3100 serial port 2
2808                 212 = /dev/ttyMAX3             MAX3100 serial port 3
2809
2810205 char        Low-density serial ports (alternate device)
2811                  0 = /dev/culu0                Callout device for ttyLU0
2812                  1 = /dev/culu1                Callout device for ttyLU1
2813                  2 = /dev/culu2                Callout device for ttyLU2
2814                  3 = /dev/culu3                Callout device for ttyLU3
2815                  4 = /dev/cufb0                Callout device for ttyFB0
2816                  5 = /dev/cusa0                Callout device for ttySA0
2817                  6 = /dev/cusa1                Callout device for ttySA1
2818                  7 = /dev/cusa2                Callout device for ttySA2
2819                  8 = /dev/cusc0                Callout device for ttySC0
2820                  9 = /dev/cusc1                Callout device for ttySC1
2821                 10 = /dev/cusc2                Callout device for ttySC2
2822                 11 = /dev/cusc3                Callout device for ttySC3
2823                 12 = /dev/cufw0                Callout device for ttyFW0
2824                 13 = /dev/cufw1                Callout device for ttyFW1
2825                 14 = /dev/cufw2                Callout device for ttyFW2
2826                 15 = /dev/cufw3                Callout device for ttyFW3
2827                 16 = /dev/cuam0                Callout device for ttyAM0
2828                    ...
2829                 31 = /dev/cuam15               Callout device for ttyAM15
2830                 32 = /dev/cudb0                Callout device for ttyDB0
2831                    ...
2832                 39 = /dev/cudb7                Callout device for ttyDB7
2833                 40 = /dev/cusg0                Callout device for ttySG0
2834                 41 = /dev/ttycusmx0            Callout device for ttySMX0
2835                 42 = /dev/ttycusmx1            Callout device for ttySMX1
2836                 43 = /dev/ttycusmx2            Callout device for ttySMX2
2837                 46 = /dev/cucpm0               Callout device for ttyCPM0
2838                    ...
2839                 49 = /dev/cucpm5               Callout device for ttyCPM5
2840                 50 = /dev/cuioc40              Callout device for ttyIOC40
2841                    ...
2842                 81 = /dev/cuioc431             Callout device for ttyIOC431
2843                 82 = /dev/cuvr0                Callout device for ttyVR0
2844                 83 = /dev/cuvr1                Callout device for ttyVR1
2845
2846206 char        OnStream SC-x0 tape devices
2847                  0 = /dev/osst0                First OnStream SCSI tape, mode 0
2848                  1 = /dev/osst1                Second OnStream SCSI tape, mode 0
2849                    ...
2850                 32 = /dev/osst0l               First OnStream SCSI tape, mode 1
2851                 33 = /dev/osst1l               Second OnStream SCSI tape, mode 1
2852                    ...
2853                 64 = /dev/osst0m               First OnStream SCSI tape, mode 2
2854                 65 = /dev/osst1m               Second OnStream SCSI tape, mode 2
2855                    ...
2856                 96 = /dev/osst0a               First OnStream SCSI tape, mode 3
2857                 97 = /dev/osst1a               Second OnStream SCSI tape, mode 3
2858                    ...
2859                128 = /dev/nosst0               No rewind version of /dev/osst0
2860                129 = /dev/nosst1               No rewind version of /dev/osst1
2861                    ...
2862                160 = /dev/nosst0l              No rewind version of /dev/osst0l
2863                161 = /dev/nosst1l              No rewind version of /dev/osst1l
2864                    ...
2865                192 = /dev/nosst0m              No rewind version of /dev/osst0m
2866                193 = /dev/nosst1m              No rewind version of /dev/osst1m
2867                    ...
2868                224 = /dev/nosst0a              No rewind version of /dev/osst0a
2869                225 = /dev/nosst1a              No rewind version of /dev/osst1a
2870                    ...
2871
2872                The OnStream SC-x0 SCSI tapes do not support the
2873                standard SCSI SASD command set and therefore need
2874                their own driver "osst". Note that the IDE, USB (and
2875                maybe ParPort) versions may be driven via ide-scsi or
2876                usb-storage SCSI emulation and this osst device and
2877                driver as well.  The ADR-x0 drives are QIC-157
2878                compliant and don't need osst.
2879
2880207 char        Compaq ProLiant health feature indicate
2881                  0 = /dev/cpqhealth/cpqw       Redirector interface
2882                  1 = /dev/cpqhealth/crom       EISA CROM
2883                  2 = /dev/cpqhealth/cdt        Data Table
2884                  3 = /dev/cpqhealth/cevt       Event Log
2885                  4 = /dev/cpqhealth/casr       Automatic Server Recovery
2886                  5 = /dev/cpqhealth/cecc       ECC Memory
2887                  6 = /dev/cpqhealth/cmca       Machine Check Architecture
2888                  7 = /dev/cpqhealth/ccsm       Deprecated CDT
2889                  8 = /dev/cpqhealth/cnmi       NMI Handling
2890                  9 = /dev/cpqhealth/css        Sideshow Management
2891                 10 = /dev/cpqhealth/cram       CMOS interface
2892                 11 = /dev/cpqhealth/cpci       PCI IRQ interface
2893
2894208 char        User space serial ports
2895                  0 = /dev/ttyU0                First user space serial port
2896                  1 = /dev/ttyU1                Second user space serial port
2897                    ...
2898
2899209 char        User space serial ports (alternate devices)
2900                  0 = /dev/cuu0                 Callout device for ttyU0
2901                  1 = /dev/cuu1                 Callout device for ttyU1
2902                    ...
2903
2904210 char        SBE, Inc. sync/async serial card
2905                  0 = /dev/sbei/wxcfg0          Configuration device for board 0
2906                  1 = /dev/sbei/dld0            Download device for board 0
2907                  2 = /dev/sbei/wan00           WAN device, port 0, board 0
2908                  3 = /dev/sbei/wan01           WAN device, port 1, board 0
2909                  4 = /dev/sbei/wan02           WAN device, port 2, board 0
2910                  5 = /dev/sbei/wan03           WAN device, port 3, board 0
2911                  6 = /dev/sbei/wanc00          WAN clone device, port 0, board 0
2912                  7 = /dev/sbei/wanc01          WAN clone device, port 1, board 0
2913                  8 = /dev/sbei/wanc02          WAN clone device, port 2, board 0
2914                  9 = /dev/sbei/wanc03          WAN clone device, port 3, board 0
2915                 10 = /dev/sbei/wxcfg1          Configuration device for board 1
2916                 11 = /dev/sbei/dld1            Download device for board 1
2917                 12 = /dev/sbei/wan10           WAN device, port 0, board 1
2918                 13 = /dev/sbei/wan11           WAN device, port 1, board 1
2919                 14 = /dev/sbei/wan12           WAN device, port 2, board 1
2920                 15 = /dev/sbei/wan13           WAN device, port 3, board 1
2921                 16 = /dev/sbei/wanc10          WAN clone device, port 0, board 1
2922                 17 = /dev/sbei/wanc11          WAN clone device, port 1, board 1
2923                 18 = /dev/sbei/wanc12          WAN clone device, port 2, board 1
2924                 19 = /dev/sbei/wanc13          WAN clone device, port 3, board 1
2925                    ...
2926
2927                Yes, each board is really spaced 10 (decimal) apart.
2928
2929211 char        Addinum CPCI1500 digital I/O card
2930                  0 = /dev/addinum/cpci1500/0   First CPCI1500 card
2931                  1 = /dev/addinum/cpci1500/1   Second CPCI1500 card
2932                    ...
2933
2934212 char        LinuxTV.org DVB driver subsystem
2935                  0 = /dev/dvb/adapter0/video0    first video decoder of first card
2936                  1 = /dev/dvb/adapter0/audio0    first audio decoder of first card
2937                  2 = /dev/dvb/adapter0/sec0      (obsolete/unused)
2938                  3 = /dev/dvb/adapter0/frontend0 first frontend device of first card
2939                  4 = /dev/dvb/adapter0/demux0    first demux device of first card
2940                  5 = /dev/dvb/adapter0/dvr0      first digital video recoder device of first card
2941                  6 = /dev/dvb/adapter0/ca0       first common access port of first card
2942                  7 = /dev/dvb/adapter0/net0      first network device of first card
2943                  8 = /dev/dvb/adapter0/osd0      first on-screen-display device of first card
2944                  9 = /dev/dvb/adapter0/video1    second video decoder of first card
2945                    ...
2946                 64 = /dev/dvb/adapter1/video0    first video decoder of second card
2947                    ...
2948                128 = /dev/dvb/adapter2/video0    first video decoder of third card
2949                    ...
2950                196 = /dev/dvb/adapter3/video0    first video decoder of fourth card
2951
2952216 char        Bluetooth RFCOMM TTY devices
2953                  0 = /dev/rfcomm0              First Bluetooth RFCOMM TTY device
2954                  1 = /dev/rfcomm1              Second Bluetooth RFCOMM TTY device
2955                    ...
2956
2957217 char        Bluetooth RFCOMM TTY devices (alternate devices)
2958                  0 = /dev/curf0                Callout device for rfcomm0
2959                  1 = /dev/curf1                Callout device for rfcomm1
2960                    ...
2961
2962218 char        The Logical Company bus Unibus/Qbus adapters
2963                  0 = /dev/logicalco/bci/0      First bus adapter
2964                  1 = /dev/logicalco/bci/1      First bus adapter
2965                    ...
2966
2967219 char        The Logical Company DCI-1300 digital I/O card
2968                  0 = /dev/logicalco/dci1300/0  First DCI-1300 card
2969                  1 = /dev/logicalco/dci1300/1  Second DCI-1300 card
2970                    ...
2971
2972220 char        Myricom Myrinet "GM" board
2973                  0 = /dev/myricom/gm0          First Myrinet GM board
2974                  1 = /dev/myricom/gmp0         First board "root access"
2975                  2 = /dev/myricom/gm1          Second Myrinet GM board
2976                  3 = /dev/myricom/gmp1         Second board "root access"
2977                    ...
2978
2979221 char        VME bus
2980                  0 = /dev/bus/vme/m0           First master image
2981                  1 = /dev/bus/vme/m1           Second master image
2982                  2 = /dev/bus/vme/m2           Third master image
2983                  3 = /dev/bus/vme/m3           Fourth master image
2984                  4 = /dev/bus/vme/s0           First slave image
2985                  5 = /dev/bus/vme/s1           Second slave image
2986                  6 = /dev/bus/vme/s2           Third slave image
2987                  7 = /dev/bus/vme/s3           Fourth slave image
2988                  8 = /dev/bus/vme/ctl          Control
2989
2990                It is expected that all VME bus drivers will use the
2991                same interface.  For interface documentation see
2992                http://www.vmelinux.org/.
2993
2994224 char        A2232 serial card
2995                  0 = /dev/ttyY0                First A2232 port
2996                  1 = /dev/ttyY1                Second A2232 port
2997                    ...
2998
2999225 char        A2232 serial card (alternate devices)
3000                  0 = /dev/cuy0                 Callout device for ttyY0
3001                  1 = /dev/cuy1                 Callout device for ttyY1
3002                    ...
3003
3004226 char        Direct Rendering Infrastructure (DRI)
3005                  0 = /dev/dri/card0            First graphics card
3006                  1 = /dev/dri/card1            Second graphics card
3007                    ...
3008
3009227 char        IBM 3270 terminal Unix tty access
3010                  1 = /dev/3270/tty1            First 3270 terminal
3011                  2 = /dev/3270/tty2            Seconds 3270 terminal
3012                    ...
3013
3014228 char        IBM 3270 terminal block-mode access
3015                  0 = /dev/3270/tub             Controlling interface
3016                  1 = /dev/3270/tub1            First 3270 terminal
3017                  2 = /dev/3270/tub2            Second 3270 terminal
3018                    ...
3019
3020229 char        IBM iSeries/pSeries virtual console
3021                  0 = /dev/hvc0                 First console port
3022                  1 = /dev/hvc1                 Second console port
3023                    ...
3024
3025230 char        IBM iSeries virtual tape
3026                  0 = /dev/iseries/vt0          First virtual tape, mode 0
3027                  1 = /dev/iseries/vt1          Second virtual tape, mode 0
3028                    ...
3029                 32 = /dev/iseries/vt0l         First virtual tape, mode 1
3030                 33 = /dev/iseries/vt1l         Second virtual tape, mode 1
3031                    ...
3032                 64 = /dev/iseries/vt0m         First virtual tape, mode 2
3033                 65 = /dev/iseries/vt1m         Second virtual tape, mode 2
3034                    ...
3035                 96 = /dev/iseries/vt0a         First virtual tape, mode 3
3036                 97 = /dev/iseries/vt1a         Second virtual tape, mode 3
3037                      ...
3038                128 = /dev/iseries/nvt0         First virtual tape, mode 0, no rewind
3039                129 = /dev/iseries/nvt1         Second virtual tape, mode 0, no rewind
3040                    ...
3041                160 = /dev/iseries/nvt0l        First virtual tape, mode 1, no rewind
3042                161 = /dev/iseries/nvt1l        Second virtual tape, mode 1, no rewind
3043                    ...
3044                192 = /dev/iseries/nvt0m        First virtual tape, mode 2, no rewind
3045                193 = /dev/iseries/nvt1m        Second virtual tape, mode 2, no rewind
3046                    ...
3047                224 = /dev/iseries/nvt0a        First virtual tape, mode 3, no rewind
3048                225 = /dev/iseries/nvt1a        Second virtual tape, mode 3, no rewind
3049                    ...
3050
3051                "No rewind" refers to the omission of the default
3052                automatic rewind on device close.  The MTREW or MTOFFL
3053                ioctl()'s can be used to rewind the tape regardless of
3054                the device used to access it.
3055
3056231 char        InfiniBand
3057                0 = /dev/infiniband/umad0
3058                1 = /dev/infiniband/umad1
3059                  ...
3060                63 = /dev/infiniband/umad63    63rd InfiniBandMad device
3061                64 = /dev/infiniband/issm0     First InfiniBand IsSM device
3062                65 = /dev/infiniband/issm1     Second InfiniBand IsSM device
3063                  ...
3064                127 = /dev/infiniband/issm63    63rd InfiniBand IsSM device
3065                128 = /dev/infiniband/uverbs0   First InfiniBand verbs device
3066                129 = /dev/infiniband/uverbs1   Second InfiniBand verbs device
3067                  ...
3068                159 = /dev/infiniband/uverbs31  31st InfiniBand verbs device
3069
3070232 char        Biometric Devices
3071                0 = /dev/biometric/sensor0/fingerprint  first fingerprint sensor on first device
3072                1 = /dev/biometric/sensor0/iris         first iris sensor on first device
3073                2 = /dev/biometric/sensor0/retina       first retina sensor on first device
3074                3 = /dev/biometric/sensor0/voiceprint   first voiceprint sensor on first device
3075                4 = /dev/biometric/sensor0/facial       first facial sensor on first device
3076                5 = /dev/biometric/sensor0/hand         first hand sensor on first device
3077                  ...
3078                10 = /dev/biometric/sensor1/fingerprint first fingerprint sensor on second device
3079                  ...
3080                20 = /dev/biometric/sensor2/fingerprint first fingerprint sensor on third device
3081                  ...
3082
3083233 char        PathScale InfiniPath interconnect
3084                0 = /dev/ipath        Primary device for programs (any unit)
3085                1 = /dev/ipath0       Access specifically to unit 0
3086                2 = /dev/ipath1       Access specifically to unit 1
3087                  ...
3088                4 = /dev/ipath3       Access specifically to unit 3
3089                129 = /dev/ipath_sma    Device used by Subnet Management Agent
3090                130 = /dev/ipath_diag   Device used by diagnostics programs
3091
3092234-239         UNASSIGNED
3093
3094240-254 char    LOCAL/EXPERIMENTAL USE
3095
3096240-254 block   LOCAL/EXPERIMENTAL USE
3097                Allocated for local/experimental use.  For devices not
3098                assigned official numbers, these ranges should be
3099                used in order to avoid conflicting with future assignments.
3100
3101255 char        RESERVED
3102
3103255 block       RESERVED
3104
3105                This major is reserved to assist the expansion to a
3106                larger number space.  No device nodes with this major
3107                should ever be created on the filesystem.
3108                (This is probably not true anymore, but I'll leave it
3109                for now /Torben)
3110
3111---LARGE MAJORS!!!!!---
3112
3113256 char        Equinox SST multi-port serial boards
3114                   0 = /dev/ttyEQ0      First serial port on first Equinox SST board
3115                 127 = /dev/ttyEQ127    Last serial port on first Equinox SST board
3116                 128 = /dev/ttyEQ128    First serial port on second Equinox SST board
3117                  ...
3118                1027 = /dev/ttyEQ1027   Last serial port on eighth Equinox SST board
3119
3120256 block       Resident Flash Disk Flash Translation Layer
3121                  0 = /dev/rfda         First RFD FTL layer
3122                 16 = /dev/rfdb         Second RFD FTL layer
3123                  ...
3124                240 = /dev/rfdp         16th RFD FTL layer
3125
3126257 char        Phoenix Technologies Cryptographic Services Driver
3127                  0 = /dev/ptlsec       Crypto Services Driver
3128
3129257 block       SSFDC Flash Translation Layer filesystem
3130                  0 = /dev/ssfdca       First SSFDC layer
3131                  8 = /dev/ssfdcb       Second SSFDC layer
3132                 16 = /dev/ssfdcc       Third SSFDC layer
3133                 24 = /dev/ssfdcd       4th SSFDC layer
3134                 32 = /dev/ssfdce       5th SSFDC layer
3135                 40 = /dev/ssfdcf       6th SSFDC layer
3136                 48 = /dev/ssfdcg       7th SSFDC layer
3137                 56 = /dev/ssfdch       8th SSFDC layer
3138
3139258 block       ROM/Flash read-only translation layer
3140                  0 = /dev/blockrom0    First ROM card's translation layer interface
3141                  1 = /dev/blockrom1    Second ROM card's translation layer interface
3142                  ...
3143
3144259 block       Block Extended Major
3145                  Used dynamically to hold additional partition minor
3146                  numbers and allow large numbers of partitions per device
3147
3148259 char        FPGA configuration interfaces
3149                  0 = /dev/icap0        First Xilinx internal configuration
3150                  1 = /dev/icap1        Second Xilinx internal configuration
3151
3152260 char        OSD (Object-based-device) SCSI Device
3153                  0 = /dev/osd0         First OSD Device
3154                  1 = /dev/osd1         Second OSD Device
3155                  ...
3156                  255 = /dev/osd255     256th OSD Device
3157
3158 ****   ADDITIONAL /dev DIRECTORY ENTRIES
3159
3160This section details additional entries that should or may exist in
3161the /dev directory.  It is preferred that symbolic links use the same
3162form (absolute or relative) as is indicated here.  Links are
3163classified as "hard" or "symbolic" depending on the preferred type of
3164link; if possible, the indicated type of link should be used.
3165
3166
3167        Compulsory links
3168
3169These links should exist on all systems:
3170
3171/dev/fd         /proc/self/fd   symbolic        File descriptors
3172/dev/stdin      fd/0            symbolic        stdin file descriptor
3173/dev/stdout     fd/1            symbolic        stdout file descriptor
3174/dev/stderr     fd/2            symbolic        stderr file descriptor
3175/dev/nfsd       socksys         symbolic        Required by iBCS-2
3176/dev/X0R        null            symbolic        Required by iBCS-2
3177
3178Note: /dev/X0R is <letter X>-<digit 0>-<letter R>.
3179
3180        Recommended links
3181
3182It is recommended that these links exist on all systems:
3183
3184/dev/core       /proc/kcore     symbolic        Backward compatibility
3185/dev/ramdisk    ram0            symbolic        Backward compatibility
3186/dev/ftape      qft0            symbolic        Backward compatibility
3187/dev/bttv0      video0          symbolic        Backward compatibility
3188/dev/radio      radio0          symbolic        Backward compatibility
3189/dev/i2o*       /dev/i2o/*      symbolic        Backward compatibility
3190/dev/scd?       sr?             hard            Alternate SCSI CD-ROM name
3191
3192        Locally defined links
3193
3194The following links may be established locally to conform to the
3195configuration of the system.  This is merely a tabulation of existing
3196practice, and does not constitute a recommendation.  However, if they
3197exist, they should have the following uses.
3198
3199/dev/mouse      mouse port      symbolic        Current mouse device
3200/dev/tape       tape device     symbolic        Current tape device
3201/dev/cdrom      CD-ROM device   symbolic        Current CD-ROM device
3202/dev/cdwriter   CD-writer       symbolic        Current CD-writer device
3203/dev/scanner    scanner         symbolic        Current scanner device
3204/dev/modem      modem port      symbolic        Current dialout device
3205/dev/root       root device     symbolic        Current root filesystem
3206/dev/swap       swap device     symbolic        Current swap device
3207
3208/dev/modem should not be used for a modem which supports dialin as
3209well as dialout, as it tends to cause lock file problems.  If it
3210exists, /dev/modem should point to the appropriate primary TTY device
3211(the use of the alternate callout devices is deprecated).
3212
3213For SCSI devices, /dev/tape and /dev/cdrom should point to the
3214``cooked'' devices (/dev/st* and /dev/sr*, respectively), whereas
3215/dev/cdwriter and /dev/scanner should point to the appropriate generic
3216SCSI devices (/dev/sg*).
3217
3218/dev/mouse may point to a primary serial TTY device, a hardware mouse
3219device, or a socket for a mouse driver program (e.g. /dev/gpmdata).
3220
3221        Sockets and pipes
3222
3223Non-transient sockets and named pipes may exist in /dev.  Common entries are:
3224
3225/dev/printer    socket          lpd local socket
3226/dev/log        socket          syslog local socket
3227/dev/gpmdata    socket          gpm mouse multiplexer
3228
3229        Mount points
3230
3231The following names are reserved for mounting special filesystems
3232under /dev.  These special filesystems provide kernel interfaces that
3233cannot be provided with standard device nodes.
3234
3235/dev/pts        devpts          PTY slave filesystem
3236/dev/shm        tmpfs           POSIX shared memory maintenance access
3237
3238 ****   TERMINAL DEVICES
3239
3240Terminal, or TTY devices are a special class of character devices.  A
3241terminal device is any device that could act as a controlling terminal
3242for a session; this includes virtual consoles, serial ports, and
3243pseudoterminals (PTYs).
3244
3245All terminal devices share a common set of capabilities known as line
3246disciplines; these include the common terminal line discipline as well
3247as SLIP and PPP modes.
3248
3249All terminal devices are named similarly; this section explains the
3250naming and use of the various types of TTYs.  Note that the naming
3251conventions include several historical warts; some of these are
3252Linux-specific, some were inherited from other systems, and some
3253reflect Linux outgrowing a borrowed convention.
3254
3255A hash mark (#) in a device name is used here to indicate a decimal
3256number without leading zeroes.
3257
3258        Virtual consoles and the console device
3259
3260Virtual consoles are full-screen terminal displays on the system video
3261monitor.  Virtual consoles are named /dev/tty#, with numbering
3262starting at /dev/tty1; /dev/tty0 is the current virtual console.
3263/dev/tty0 is the device that should be used to access the system video
3264card on those architectures for which the frame buffer devices
3265(/dev/fb*) are not applicable.  Do not use /dev/console
3266for this purpose.
3267
3268The console device, /dev/console, is the device to which system
3269messages should be sent, and on which logins should be permitted in
3270single-user mode.  Starting with Linux 2.1.71, /dev/console is managed
3271by the kernel; for previous versions it should be a symbolic link to
3272either /dev/tty0, a specific virtual console such as /dev/tty1, or to
3273a serial port primary (tty*, not cu*) device, depending on the
3274configuration of the system.
3275
3276        Serial ports
3277
3278Serial ports are RS-232 serial ports and any device which simulates
3279one, either in hardware (such as internal modems) or in software (such
3280as the ISDN driver.)  Under Linux, each serial ports has two device
3281names, the primary or callin device and the alternate or callout one.
3282Each kind of device is indicated by a different letter.  For any
3283letter X, the names of the devices are /dev/ttyX# and /dev/cux#,
3284respectively; for historical reasons, /dev/ttyS# and /dev/ttyC#
3285correspond to /dev/cua# and /dev/cub#.  In the future, it should be
3286expected that multiple letters will be used; all letters will be upper
3287case for the "tty" device (e.g. /dev/ttyDP#) and lower case for the
3288"cu" device (e.g. /dev/cudp#).
3289
3290The names /dev/ttyQ# and /dev/cuq# are reserved for local use.
3291
3292The alternate devices provide for kernel-based exclusion and somewhat
3293different defaults than the primary devices.  Their main purpose is to
3294allow the use of serial ports with programs with no inherent or broken
3295support for serial ports.  Their use is deprecated, and they may be
3296removed from a future version of Linux.
3297
3298Arbitration of serial ports is provided by the use of lock files with
3299the names /var/lock/LCK..ttyX#.  The contents of the lock file should
3300be the PID of the locking process as an ASCII number.
3301
3302It is common practice to install links such as /dev/modem
3303which point to serial ports.  In order to ensure proper locking in the
3304presence of these links, it is recommended that software chase
3305symlinks and lock all possible names; additionally, it is recommended
3306that a lock file be installed with the corresponding alternate
3307device.  In order to avoid deadlocks, it is recommended that the locks
3308are acquired in the following order, and released in the reverse:
3309
3310        1. The symbolic link name, if any (/var/lock/LCK..modem)
3311        2. The "tty" name (/var/lock/LCK..ttyS2)
3312        3. The alternate device name (/var/lock/LCK..cua2)
3313
3314In the case of nested symbolic links, the lock files should be
3315installed in the order the symlinks are resolved.
3316
3317Under no circumstances should an application hold a lock while waiting
3318for another to be released.  In addition, applications which attempt
3319to create lock files for the corresponding alternate device names
3320should take into account the possibility of being used on a non-serial
3321port TTY, for which no alternate device would exist.
3322
3323        Pseudoterminals (PTYs)
3324
3325Pseudoterminals, or PTYs, are used to create login sessions or provide
3326other capabilities requiring a TTY line discipline (including SLIP or
3327PPP capability) to arbitrary data-generation processes.  Each PTY has
3328a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named
3329/dev/tty[p-za-e][0-9a-f].  The kernel arbitrates the use of PTYs by
3330allowing each master side to be opened only once.
3331
3332Once the master side has been opened, the corresponding slave device
3333can be used in the same manner as any TTY device.  The master and
3334slave devices are connected by the kernel, generating the equivalent
3335of a bidirectional pipe with TTY capabilities.
3336
3337Recent versions of the Linux kernels and GNU libc contain support for
3338the System V/Unix98 naming scheme for PTYs, which assigns a common
3339device, /dev/ptmx, to all the masters (opening it will automatically
3340give you a previously unassigned PTY) and a subdirectory, /dev/pts,
3341for the slaves; the slaves are named with decimal integers (/dev/pts/#
3342in our notation).  This removes the problem of exhausting the
3343namespace and enables the kernel to automatically create the device
3344nodes for the slaves on demand using the "devpts" filesystem.
3345
3346
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