2 LINUX ALLOCATED DEVICES
4 Maintained by John Cagle <device@lanana.org>
6 Last revised: 15 March 2004
8 This list is the Linux Device List, the official registry of allocated
9 device numbers and /dev directory nodes for the Linux operating
12 The latest version of this list is available from
13 http://www.lanana.org/docs/device-list/ or
14 ftp://ftp.kernel.org/pub/linux/docs/device-list/. This version may be
15 newer than the one distributed with the Linux kernel.
17 The LaTeX version of this document is no longer maintained.
19 This document is included by reference into the Filesystem Hierarchy
20 Standard (FHS). The FHS is available from http://www.pathname.com/fhs/.
22 Allocations marked (68k/Amiga) apply to Linux/68k on the Amiga
23 platform only. Allocations marked (68k/Atari) apply to Linux/68k on
24 the Atari platform only.
26 The symbol {2.6} means the allocation is obsolete and scheduled for
27 removal once kernel version 2.6 (or equivalent) is released.
29 This document is in the public domain. The author requests, however,
30 that semantically altered versions are not distributed without
31 permission of the author, assuming the author can be contacted without
32 an unreasonable effort.
34 In particular, please don't sent patches for this list to Linus, at
35 least not without contacting me first.
37 I do not have any information about these devices beyond what appears
38 on this list. Any such information requests will be deleted without
42 **** DEVICE DRIVERS AUTHORS PLEASE READ THIS ****
44 THE DEVICE REGISTRY IS OFFICIALLY FROZEN FOR LINUS TORVALDS' KERNEL
45 TREE. At Linus' request, no more allocations will be made official
46 for Linus' kernel tree; the 3 June 2001 version of this list is the
47 official final version of this registry. At Alan Cox' request,
48 however, the registry will continue to be maintained for the -ac
49 series of kernels, and registrations will be accepted.
51 To have a major number allocated, or a minor number in situations
52 where that applies (e.g. busmice), please contact me with the
53 appropriate device information. Also, if you have additional
54 information regarding any of the devices listed below, or if I have
55 made a mistake, I would greatly appreciate a note.
57 I do, however, make a few requests about the nature of your report.
58 This is necessary for me to be able to keep this list up to date and
59 correct in a timely manner. First of all, *please* send it to the
60 correct address... <device@lanana.org>. I receive hundreds of email
61 messages a day, so mail sent to other addresses may very well get lost
62 in the avalanche. Please put in a descriptive subject, so I can find
63 your mail again should I need to. Too many people send me email
64 saying just "device number request" in the subject.
66 Second, please include a description of the device *in the same format
67 as this list*. The reason for this is that it is the only way I have
68 found to ensure I have all the requisite information to publish your
69 device and avoid conflicts.
71 Third, please don't assume that the distributed version of the list is
72 up to date. Due to the number of registrations I have to maintain it
73 in "batch mode", so there is likely additional registrations that
74 haven't been listed yet.
76 Finally, sometimes I have to play "namespace police." Please don't be
77 offended. I often get submissions for /dev names that would be bound
78 to cause conflicts down the road. I am trying to avoid getting in a
79 situation where we would have to suffer an incompatible forward
80 change. Therefore, please consult with me *before* you make your
81 device names and numbers in any way public, at least to the point
82 where it would be at all difficult to get them changed.
84 Your cooperation is appreciated.
87 0 Unnamed devices (e.g. non-device mounts)
88 0 = reserved as null device number
89 See block major 144, 145, 146 for expansion areas.
92 1 = /dev/mem Physical memory access
93 2 = /dev/kmem Kernel virtual memory access
94 3 = /dev/null Null device
95 4 = /dev/port I/O port access
96 5 = /dev/zero Null byte source
97 6 = /dev/core OBSOLETE - replaced by /proc/kcore
98 7 = /dev/full Returns ENOSPC on write
99 8 = /dev/random Nondeterministic random number gen.
100 9 = /dev/urandom Faster, less secure random number gen.
101 10 = /dev/aio Asyncronous I/O notification interface
102 11 = /dev/kmsg Writes to this come out as printk's
104 0 = /dev/ram0 First RAM disk
105 1 = /dev/ram1 Second RAM disk
107 250 = /dev/initrd Initial RAM disk {2.6}
109 Older kernels had /dev/ramdisk (1, 1) here.
110 /dev/initrd refers to a RAM disk which was preloaded
111 by the boot loader; newer kernels use /dev/ram0 for
114 2 char Pseudo-TTY masters
115 0 = /dev/ptyp0 First PTY master
116 1 = /dev/ptyp1 Second PTY master
118 255 = /dev/ptyef 256th PTY master
120 Pseudo-tty's are named as follows:
121 * Masters are "pty", slaves are "tty";
122 * the fourth letter is one of pqrstuvwxyzabcde indicating
123 the 1st through 16th series of 16 pseudo-ttys each, and
124 * the fifth letter is one of 0123456789abcdef indicating
125 the position within the series.
127 These are the old-style (BSD) PTY devices; Unix98
128 devices are on major 128 and above and use the PTY
129 master multiplex (/dev/ptmx) to acquire a PTY on
133 0 = /dev/fd0 Controller 0, drive 0, autodetect
134 1 = /dev/fd1 Controller 0, drive 1, autodetect
135 2 = /dev/fd2 Controller 0, drive 2, autodetect
136 3 = /dev/fd3 Controller 0, drive 3, autodetect
137 128 = /dev/fd4 Controller 1, drive 0, autodetect
138 129 = /dev/fd5 Controller 1, drive 1, autodetect
139 130 = /dev/fd6 Controller 1, drive 2, autodetect
140 131 = /dev/fd7 Controller 1, drive 3, autodetect
142 To specify format, add to the autodetect device number:
143 0 = /dev/fd? Autodetect format
144 4 = /dev/fd?d360 5.25" 360K in a 360K drive(1)
145 20 = /dev/fd?h360 5.25" 360K in a 1200K drive(1)
146 48 = /dev/fd?h410 5.25" 410K in a 1200K drive
147 64 = /dev/fd?h420 5.25" 420K in a 1200K drive
148 24 = /dev/fd?h720 5.25" 720K in a 1200K drive
149 80 = /dev/fd?h880 5.25" 880K in a 1200K drive(1)
150 8 = /dev/fd?h1200 5.25" 1200K in a 1200K drive(1)
151 40 = /dev/fd?h1440 5.25" 1440K in a 1200K drive(1)
152 56 = /dev/fd?h1476 5.25" 1476K in a 1200K drive
153 72 = /dev/fd?h1494 5.25" 1494K in a 1200K drive
154 92 = /dev/fd?h1600 5.25" 1600K in a 1200K drive(1)
156 12 = /dev/fd?u360 3.5" 360K Double Density(2)
157 16 = /dev/fd?u720 3.5" 720K Double Density(1)
158 120 = /dev/fd?u800 3.5" 800K Double Density(2)
159 52 = /dev/fd?u820 3.5" 820K Double Density
160 68 = /dev/fd?u830 3.5" 830K Double Density
161 84 = /dev/fd?u1040 3.5" 1040K Double Density(1)
162 88 = /dev/fd?u1120 3.5" 1120K Double Density(1)
163 28 = /dev/fd?u1440 3.5" 1440K High Density(1)
164 124 = /dev/fd?u1600 3.5" 1600K High Density(1)
165 44 = /dev/fd?u1680 3.5" 1680K High Density(3)
166 60 = /dev/fd?u1722 3.5" 1722K High Density
167 76 = /dev/fd?u1743 3.5" 1743K High Density
168 96 = /dev/fd?u1760 3.5" 1760K High Density
169 116 = /dev/fd?u1840 3.5" 1840K High Density(3)
170 100 = /dev/fd?u1920 3.5" 1920K High Density(1)
171 32 = /dev/fd?u2880 3.5" 2880K Extra Density(1)
172 104 = /dev/fd?u3200 3.5" 3200K Extra Density
173 108 = /dev/fd?u3520 3.5" 3520K Extra Density
174 112 = /dev/fd?u3840 3.5" 3840K Extra Density(1)
176 36 = /dev/fd?CompaQ Compaq 2880K drive; obsolete?
178 (1) Autodetectable format
179 (2) Autodetectable format in a Double Density (720K) drive only
180 (3) Autodetectable format in a High Density (1440K) drive only
182 NOTE: The letter in the device name (d, q, h or u)
183 signifies the type of drive: 5.25" Double Density (d),
184 5.25" Quad Density (q), 5.25" High Density (h) or 3.5"
185 (any model, u). The use of the capital letters D, H
186 and E for the 3.5" models have been deprecated, since
187 the drive type is insignificant for these devices.
189 3 char Pseudo-TTY slaves
190 0 = /dev/ttyp0 First PTY slave
191 1 = /dev/ttyp1 Second PTY slave
193 255 = /dev/ttyef 256th PTY slave
195 These are the old-style (BSD) PTY devices; Unix98
196 devices are on major 136 and above.
198 3 block First MFM, RLL and IDE hard disk/CD-ROM interface
199 0 = /dev/hda Master: whole disk (or CD-ROM)
200 64 = /dev/hdb Slave: whole disk (or CD-ROM)
202 For partitions, add to the whole disk device number:
203 0 = /dev/hd? Whole disk
204 1 = /dev/hd?1 First partition
205 2 = /dev/hd?2 Second partition
207 63 = /dev/hd?63 63rd partition
209 For Linux/i386, partitions 1-4 are the primary
210 partitions, and 5 and above are logical partitions.
211 Other versions of Linux use partitioning schemes
212 appropriate to their respective architectures.
215 0 = /dev/tty0 Current virtual console
217 1 = /dev/tty1 First virtual console
219 63 = /dev/tty63 63rd virtual console
220 64 = /dev/ttyS0 First UART serial port
222 255 = /dev/ttyS191 192nd UART serial port
224 UART serial ports refer to 8250/16450/16550 series devices.
226 Older versions of the Linux kernel used this major
227 number for BSD PTY devices. As of Linux 2.1.115, this
228 is no longer supported. Use major numbers 2 and 3.
230 4 block Aliases for dynamically allocated major devices to be used
231 when its not possible to create the real device nodes
232 because the root filesystem is mounted read-only.
236 5 char Alternate TTY devices
237 0 = /dev/tty Current TTY device
238 1 = /dev/console System console
239 2 = /dev/ptmx PTY master multiplex
240 64 = /dev/cua0 Callout device for ttyS0
242 255 = /dev/cua191 Callout device for ttyS191
244 (5,1) is /dev/console starting with Linux 2.1.71. See
245 the section on terminal devices for more information
248 6 char Parallel printer devices
249 0 = /dev/lp0 Parallel printer on parport0
250 1 = /dev/lp1 Parallel printer on parport1
253 Current Linux kernels no longer have a fixed mapping
254 between parallel ports and I/O addresses. Instead,
255 they are redirected through the parport multiplex layer.
257 7 char Virtual console capture devices
258 0 = /dev/vcs Current vc text contents
259 1 = /dev/vcs1 tty1 text contents
261 63 = /dev/vcs63 tty63 text contents
262 128 = /dev/vcsa Current vc text/attribute contents
263 129 = /dev/vcsa1 tty1 text/attribute contents
265 191 = /dev/vcsa63 tty63 text/attribute contents
267 NOTE: These devices permit both read and write access.
269 7 block Loopback devices
270 0 = /dev/loop0 First loopback device
271 1 = /dev/loop1 Second loopback device
274 The loopback devices are used to mount filesystems not
275 associated with block devices. The binding to the
276 loopback devices is handled by mount(8) or losetup(8).
278 8 block SCSI disk devices (0-15)
279 0 = /dev/sda First SCSI disk whole disk
280 16 = /dev/sdb Second SCSI disk whole disk
281 32 = /dev/sdc Third SCSI disk whole disk
283 240 = /dev/sdp Sixteenth SCSI disk whole disk
285 Partitions are handled in the same way as for IDE
286 disks (see major number 3) except that the limit on
289 9 char SCSI tape devices
290 0 = /dev/st0 First SCSI tape, mode 0
291 1 = /dev/st1 Second SCSI tape, mode 0
293 32 = /dev/st0l First SCSI tape, mode 1
294 33 = /dev/st1l Second SCSI tape, mode 1
296 64 = /dev/st0m First SCSI tape, mode 2
297 65 = /dev/st1m Second SCSI tape, mode 2
299 96 = /dev/st0a First SCSI tape, mode 3
300 97 = /dev/st1a Second SCSI tape, mode 3
302 128 = /dev/nst0 First SCSI tape, mode 0, no rewind
303 129 = /dev/nst1 Second SCSI tape, mode 0, no rewind
305 160 = /dev/nst0l First SCSI tape, mode 1, no rewind
306 161 = /dev/nst1l Second SCSI tape, mode 1, no rewind
308 192 = /dev/nst0m First SCSI tape, mode 2, no rewind
309 193 = /dev/nst1m Second SCSI tape, mode 2, no rewind
311 224 = /dev/nst0a First SCSI tape, mode 3, no rewind
312 225 = /dev/nst1a Second SCSI tape, mode 3, no rewind
315 "No rewind" refers to the omission of the default
316 automatic rewind on device close. The MTREW or MTOFFL
317 ioctl()'s can be used to rewind the tape regardless of
318 the device used to access it.
320 9 block Metadisk (RAID) devices
321 0 = /dev/md0 First metadisk group
322 1 = /dev/md1 Second metadisk group
325 The metadisk driver is used to span a
326 filesystem across multiple physical disks.
328 10 char Non-serial mice, misc features
329 0 = /dev/logibm Logitech bus mouse
330 1 = /dev/psaux PS/2-style mouse port
331 2 = /dev/inportbm Microsoft Inport bus mouse
332 3 = /dev/atibm ATI XL bus mouse
334 4 = /dev/amigamouse Amiga mouse (68k/Amiga)
335 5 = /dev/atarimouse Atari mouse
336 6 = /dev/sunmouse Sun mouse
337 7 = /dev/amigamouse1 Second Amiga mouse
338 8 = /dev/smouse Simple serial mouse driver
339 9 = /dev/pc110pad IBM PC-110 digitizer pad
340 10 = /dev/adbmouse Apple Desktop Bus mouse
341 11 = /dev/vrtpanel Vr41xx embedded touch panel
342 13 = /dev/vpcmouse Connectix Virtual PC Mouse
343 14 = /dev/touchscreen/ucb1x00 UCB 1x00 touchscreen
344 15 = /dev/touchscreen/mk712 MK712 touchscreen
345 128 = /dev/beep Fancy beep device
346 129 = /dev/modreq Kernel module load request {2.6}
347 130 = /dev/watchdog Watchdog timer port
348 131 = /dev/temperature Machine internal temperature
349 132 = /dev/hwtrap Hardware fault trap
350 133 = /dev/exttrp External device trap
351 134 = /dev/apm_bios Advanced Power Management BIOS
352 135 = /dev/rtc Real Time Clock
353 139 = /dev/openprom SPARC OpenBoot PROM
354 140 = /dev/relay8 Berkshire Products Octal relay card
355 141 = /dev/relay16 Berkshire Products ISO-16 relay card
356 142 = /dev/msr x86 model-specific registers {2.6}
357 143 = /dev/pciconf PCI configuration space
358 144 = /dev/nvram Non-volatile configuration RAM
359 145 = /dev/hfmodem Soundcard shortwave modem control {2.6}
360 146 = /dev/graphics Linux/SGI graphics device
361 147 = /dev/opengl Linux/SGI OpenGL pipe
362 148 = /dev/gfx Linux/SGI graphics effects device
363 149 = /dev/input/mouse Linux/SGI Irix emulation mouse
364 150 = /dev/input/keyboard Linux/SGI Irix emulation keyboard
365 151 = /dev/led Front panel LEDs
366 152 = /dev/kpoll Kernel Poll Driver
367 153 = /dev/mergemem Memory merge device
368 154 = /dev/pmu Macintosh PowerBook power manager
369 155 = /dev/isictl MultiTech ISICom serial control
370 156 = /dev/lcd Front panel LCD display
371 157 = /dev/ac Applicom Intl Profibus card
372 158 = /dev/nwbutton Netwinder external button
373 159 = /dev/nwdebug Netwinder debug interface
374 160 = /dev/nwflash Netwinder flash memory
375 161 = /dev/userdma User-space DMA access
376 162 = /dev/smbus System Management Bus
377 163 = /dev/lik Logitech Internet Keyboard
378 164 = /dev/ipmo Intel Intelligent Platform Management
379 165 = /dev/vmmon VMWare virtual machine monitor
380 166 = /dev/i2o/ctl I2O configuration manager
381 167 = /dev/specialix_sxctl Specialix serial control
382 168 = /dev/tcldrv Technology Concepts serial control
383 169 = /dev/specialix_rioctl Specialix RIO serial control
384 170 = /dev/thinkpad/thinkpad IBM Thinkpad devices
385 171 = /dev/srripc QNX4 API IPC manager
386 172 = /dev/usemaclone Semaphore clone device
387 173 = /dev/ipmikcs Intelligent Platform Management
388 174 = /dev/uctrl SPARCbook 3 microcontroller
389 175 = /dev/agpgart AGP Graphics Address Remapping Table
390 176 = /dev/gtrsc Gorgy Timing radio clock
391 177 = /dev/cbm Serial CBM bus
392 178 = /dev/jsflash JavaStation OS flash SIMM
393 179 = /dev/xsvc High-speed shared-mem/semaphore service
394 180 = /dev/vrbuttons Vr41xx button input device
395 181 = /dev/toshiba Toshiba laptop SMM support
396 182 = /dev/perfctr Performance-monitoring counters
397 183 = /dev/hwrng Generic random number generator
398 184 = /dev/cpu/microcode CPU microcode update interface
399 186 = /dev/atomicps Atomic shapshot of process state data
400 187 = /dev/irnet IrNET device
401 188 = /dev/smbusbios SMBus BIOS
402 189 = /dev/ussp_ctl User space serial port control
403 190 = /dev/crash Mission Critical Linux crash dump facility
404 191 = /dev/pcl181 <information missing>
405 192 = /dev/nas_xbus NAS xbus LCD/buttons access
406 193 = /dev/d7s SPARC 7-segment display
407 194 = /dev/zkshim Zero-Knowledge network shim control
408 195 = /dev/elographics/e2201 Elographics touchscreen E271-2201
409 198 = /dev/sexec Signed executable interface
410 199 = /dev/scanners/cuecat :CueCat barcode scanner
411 200 = /dev/net/tun TAP/TUN network device
412 201 = /dev/button/gulpb Transmeta GULP-B buttons
413 204 = /dev/video/em8300 EM8300 DVD decoder control
414 205 = /dev/video/em8300_mv EM8300 DVD decoder video
415 206 = /dev/video/em8300_ma EM8300 DVD decoder audio
416 207 = /dev/video/em8300_sp EM8300 DVD decoder subpicture
417 208 = /dev/compaq/cpqphpc Compaq PCI Hot Plug Controller
418 209 = /dev/compaq/cpqrid Compaq Remote Insight Driver
419 210 = /dev/impi/bt IMPI coprocessor block transfer
420 211 = /dev/impi/smic IMPI coprocessor stream interface
421 212 = /dev/watchdogs/0 First watchdog device
422 213 = /dev/watchdogs/1 Second watchdog device
423 214 = /dev/watchdogs/2 Third watchdog device
424 215 = /dev/watchdogs/3 Fourth watchdog device
425 216 = /dev/fujitsu/apanel Fujitsu/Siemens application panel
426 217 = /dev/ni/natmotn National Instruments Motion
427 218 = /dev/kchuid Inter-process chuid control
428 219 = /dev/modems/mwave MWave modem firmware upload
429 220 = /dev/mptctl Message passing technology (MPT) control
430 221 = /dev/mvista/hssdsi Montavista PICMG hot swap system driver
431 222 = /dev/mvista/hasi Montavista PICMG high availability
432 223 = /dev/input/uinput User level driver support for input
433 224 = /dev/tpm TCPA TPM driver
434 225 = /dev/pps Pulse Per Second driver
435 226 = /dev/systrace Systrace device
436 227 = /dev/mcelog X86_64 Machine Check Exception driver
437 228 = /dev/hpet HPET driver
438 240-254 Reserved for local use
439 255 Reserved for MISC_DYNAMIC_MINOR
441 11 char Raw keyboard device (Linux/SPARC only)
442 0 = /dev/kbd Raw keyboard device
444 11 char Serial Mux device (Linux/PA-RISC only)
445 0 = /dev/ttyB0 First mux port
446 1 = /dev/ttyB1 Second mux port
449 11 block SCSI CD-ROM devices
450 0 = /dev/scd0 First SCSI CD-ROM
451 1 = /dev/scd1 Second SCSI CD-ROM
454 The prefix /dev/sr (instead of /dev/scd) has been deprecated.
457 2 = /dev/ntpqic11 QIC-11, no rewind-on-close
458 3 = /dev/tpqic11 QIC-11, rewind-on-close
459 4 = /dev/ntpqic24 QIC-24, no rewind-on-close
460 5 = /dev/tpqic24 QIC-24, rewind-on-close
461 6 = /dev/ntpqic120 QIC-120, no rewind-on-close
462 7 = /dev/tpqic120 QIC-120, rewind-on-close
463 8 = /dev/ntpqic150 QIC-150, no rewind-on-close
464 9 = /dev/tpqic150 QIC-150, rewind-on-close
466 The device names specified are proposed -- if there
467 are "standard" names for these devices, please let me know.
469 12 block MSCDEX CD-ROM callback support {2.6}
470 0 = /dev/dos_cd0 First MSCDEX CD-ROM
471 1 = /dev/dos_cd1 Second MSCDEX CD-ROM
475 0 = /dev/input/js0 First joystick
476 1 = /dev/input/js1 Second joystick
478 32 = /dev/input/mouse0 First mouse
479 33 = /dev/input/mouse1 Second mouse
481 63 = /dev/input/mice Unified mouse
482 64 = /dev/input/event0 First event queue
483 65 = /dev/input/event1 Second event queue
486 Each device type has 5 bits (32 minors).
488 13 block 8-bit MFM/RLL/IDE controller
489 0 = /dev/xda First XT disk whole disk
490 64 = /dev/xdb Second XT disk whole disk
492 Partitions are handled in the same way as IDE disks
493 (see major number 3).
495 14 char Open Sound System (OSS)
496 0 = /dev/mixer Mixer control
497 1 = /dev/sequencer Audio sequencer
498 2 = /dev/midi00 First MIDI port
499 3 = /dev/dsp Digital audio
500 4 = /dev/audio Sun-compatible digital audio
501 6 = /dev/sndstat Sound card status information {2.6}
502 7 = /dev/audioctl SPARC audio control device
503 8 = /dev/sequencer2 Sequencer -- alternate device
504 16 = /dev/mixer1 Second soundcard mixer control
505 17 = /dev/patmgr0 Sequencer patch manager
506 18 = /dev/midi01 Second MIDI port
507 19 = /dev/dsp1 Second soundcard digital audio
508 20 = /dev/audio1 Second soundcard Sun digital audio
509 33 = /dev/patmgr1 Sequencer patch manager
510 34 = /dev/midi02 Third MIDI port
511 50 = /dev/midi03 Fourth MIDI port
512 14 block BIOS harddrive callback support {2.6}
513 0 = /dev/dos_hda First BIOS harddrive whole disk
514 64 = /dev/dos_hdb Second BIOS harddrive whole disk
515 128 = /dev/dos_hdc Third BIOS harddrive whole disk
516 192 = /dev/dos_hdd Fourth BIOS harddrive whole disk
518 Partitions are handled in the same way as IDE disks
519 (see major number 3).
522 0 = /dev/js0 First analog joystick
523 1 = /dev/js1 Second analog joystick
525 128 = /dev/djs0 First digital joystick
526 129 = /dev/djs1 Second digital joystick
528 15 block Sony CDU-31A/CDU-33A CD-ROM
529 0 = /dev/sonycd Sony CDU-31a CD-ROM
531 16 char Non-SCSI scanners
532 0 = /dev/gs4500 Genius 4500 handheld scanner
533 16 block GoldStar CD-ROM
534 0 = /dev/gscd GoldStar CD-ROM
536 17 char Chase serial card
537 0 = /dev/ttyH0 First Chase port
538 1 = /dev/ttyH1 Second Chase port
540 17 block Optics Storage CD-ROM
541 0 = /dev/optcd Optics Storage CD-ROM
543 18 char Chase serial card - alternate devices
544 0 = /dev/cuh0 Callout device for ttyH0
545 1 = /dev/cuh1 Callout device for ttyH1
547 18 block Sanyo CD-ROM
548 0 = /dev/sjcd Sanyo CD-ROM
550 19 char Cyclades serial card
551 0 = /dev/ttyC0 First Cyclades port
553 31 = /dev/ttyC31 32nd Cyclades port
554 19 block "Double" compressed disk
555 0 = /dev/double0 First compressed disk
557 7 = /dev/double7 Eighth compressed disk
558 128 = /dev/cdouble0 Mirror of first compressed disk
560 135 = /dev/cdouble7 Mirror of eighth compressed disk
562 See the Double documentation for the meaning of the
565 20 char Cyclades serial card - alternate devices
566 0 = /dev/cub0 Callout device for ttyC0
568 31 = /dev/cub31 Callout device for ttyC31
569 20 block Hitachi CD-ROM (under development)
570 0 = /dev/hitcd Hitachi CD-ROM
572 21 char Generic SCSI access
573 0 = /dev/sg0 First generic SCSI device
574 1 = /dev/sg1 Second generic SCSI device
577 Most distributions name these /dev/sga, /dev/sgb...;
578 this sets an unnecessary limit of 26 SCSI devices in
579 the system and is counter to standard Linux
580 device-naming practice.
582 21 block Acorn MFM hard drive interface
583 0 = /dev/mfma First MFM drive whole disk
584 64 = /dev/mfmb Second MFM drive whole disk
586 This device is used on the ARM-based Acorn RiscPC.
587 Partitions are handled the same way as for IDE disks
588 (see major number 3).
590 22 char Digiboard serial card
591 0 = /dev/ttyD0 First Digiboard port
592 1 = /dev/ttyD1 Second Digiboard port
594 22 block Second IDE hard disk/CD-ROM interface
595 0 = /dev/hdc Master: whole disk (or CD-ROM)
596 64 = /dev/hdd Slave: whole disk (or CD-ROM)
598 Partitions are handled the same way as for the first
599 interface (see major number 3).
601 23 char Digiboard serial card - alternate devices
602 0 = /dev/cud0 Callout device for ttyD0
603 1 = /dev/cud1 Callout device for ttyD1
605 23 block Mitsumi proprietary CD-ROM
606 0 = /dev/mcd Mitsumi CD-ROM
608 24 char Stallion serial card
609 0 = /dev/ttyE0 Stallion port 0 card 0
610 1 = /dev/ttyE1 Stallion port 1 card 0
612 64 = /dev/ttyE64 Stallion port 0 card 1
613 65 = /dev/ttyE65 Stallion port 1 card 1
615 128 = /dev/ttyE128 Stallion port 0 card 2
616 129 = /dev/ttyE129 Stallion port 1 card 2
618 192 = /dev/ttyE192 Stallion port 0 card 3
619 193 = /dev/ttyE193 Stallion port 1 card 3
621 24 block Sony CDU-535 CD-ROM
622 0 = /dev/cdu535 Sony CDU-535 CD-ROM
624 25 char Stallion serial card - alternate devices
625 0 = /dev/cue0 Callout device for ttyE0
626 1 = /dev/cue1 Callout device for ttyE1
628 64 = /dev/cue64 Callout device for ttyE64
629 65 = /dev/cue65 Callout device for ttyE65
631 128 = /dev/cue128 Callout device for ttyE128
632 129 = /dev/cue129 Callout device for ttyE129
634 192 = /dev/cue192 Callout device for ttyE192
635 193 = /dev/cue193 Callout device for ttyE193
637 25 block First Matsushita (Panasonic/SoundBlaster) CD-ROM
638 0 = /dev/sbpcd0 Panasonic CD-ROM controller 0 unit 0
639 1 = /dev/sbpcd1 Panasonic CD-ROM controller 0 unit 1
640 2 = /dev/sbpcd2 Panasonic CD-ROM controller 0 unit 2
641 3 = /dev/sbpcd3 Panasonic CD-ROM controller 0 unit 3
643 26 char Quanta WinVision frame grabber {2.6}
644 0 = /dev/wvisfgrab Quanta WinVision frame grabber
645 26 block Second Matsushita (Panasonic/SoundBlaster) CD-ROM
646 0 = /dev/sbpcd4 Panasonic CD-ROM controller 1 unit 0
647 1 = /dev/sbpcd5 Panasonic CD-ROM controller 1 unit 1
648 2 = /dev/sbpcd6 Panasonic CD-ROM controller 1 unit 2
649 3 = /dev/sbpcd7 Panasonic CD-ROM controller 1 unit 3
652 0 = /dev/qft0 Unit 0, rewind-on-close
653 1 = /dev/qft1 Unit 1, rewind-on-close
654 2 = /dev/qft2 Unit 2, rewind-on-close
655 3 = /dev/qft3 Unit 3, rewind-on-close
656 4 = /dev/nqft0 Unit 0, no rewind-on-close
657 5 = /dev/nqft1 Unit 1, no rewind-on-close
658 6 = /dev/nqft2 Unit 2, no rewind-on-close
659 7 = /dev/nqft3 Unit 3, no rewind-on-close
660 16 = /dev/zqft0 Unit 0, rewind-on-close, compression
661 17 = /dev/zqft1 Unit 1, rewind-on-close, compression
662 18 = /dev/zqft2 Unit 2, rewind-on-close, compression
663 19 = /dev/zqft3 Unit 3, rewind-on-close, compression
664 20 = /dev/nzqft0 Unit 0, no rewind-on-close, compression
665 21 = /dev/nzqft1 Unit 1, no rewind-on-close, compression
666 22 = /dev/nzqft2 Unit 2, no rewind-on-close, compression
667 23 = /dev/nzqft3 Unit 3, no rewind-on-close, compression
668 32 = /dev/rawqft0 Unit 0, rewind-on-close, no file marks
669 33 = /dev/rawqft1 Unit 1, rewind-on-close, no file marks
670 34 = /dev/rawqft2 Unit 2, rewind-on-close, no file marks
671 35 = /dev/rawqft3 Unit 3, rewind-on-close, no file marks
672 36 = /dev/nrawqft0 Unit 0, no rewind-on-close, no file marks
673 37 = /dev/nrawqft1 Unit 1, no rewind-on-close, no file marks
674 38 = /dev/nrawqft2 Unit 2, no rewind-on-close, no file marks
675 39 = /dev/nrawqft3 Unit 3, no rewind-on-close, no file marks
676 27 block Third Matsushita (Panasonic/SoundBlaster) CD-ROM
677 0 = /dev/sbpcd8 Panasonic CD-ROM controller 2 unit 0
678 1 = /dev/sbpcd9 Panasonic CD-ROM controller 2 unit 1
679 2 = /dev/sbpcd10 Panasonic CD-ROM controller 2 unit 2
680 3 = /dev/sbpcd11 Panasonic CD-ROM controller 2 unit 3
682 28 char Stallion serial card - card programming
683 0 = /dev/staliomem0 First Stallion card I/O memory
684 1 = /dev/staliomem1 Second Stallion card I/O memory
685 2 = /dev/staliomem2 Third Stallion card I/O memory
686 3 = /dev/staliomem3 Fourth Stallion card I/O memory
687 28 char Atari SLM ACSI laser printer (68k/Atari)
688 0 = /dev/slm0 First SLM laser printer
689 1 = /dev/slm1 Second SLM laser printer
691 28 block Fourth Matsushita (Panasonic/SoundBlaster) CD-ROM
692 0 = /dev/sbpcd12 Panasonic CD-ROM controller 3 unit 0
693 1 = /dev/sbpcd13 Panasonic CD-ROM controller 3 unit 1
694 2 = /dev/sbpcd14 Panasonic CD-ROM controller 3 unit 2
695 3 = /dev/sbpcd15 Panasonic CD-ROM controller 3 unit 3
696 28 block ACSI disk (68k/Atari)
697 0 = /dev/ada First ACSI disk whole disk
698 16 = /dev/adb Second ACSI disk whole disk
699 32 = /dev/adc Third ACSI disk whole disk
701 240 = /dev/adp 16th ACSI disk whole disk
703 Partitions are handled in the same way as for IDE
704 disks (see major number 3) except that the limit on
705 partitions is 15, like SCSI.
707 29 char Universal frame buffer
708 0 = /dev/fb0 First frame buffer
709 1 = /dev/fb1 Second frame buffer
711 31 = /dev/fb31 32nd frame buffer
713 29 block Aztech/Orchid/Okano/Wearnes CD-ROM
714 0 = /dev/aztcd Aztech CD-ROM
716 30 char iBCS-2 compatibility devices
717 0 = /dev/socksys Socket access
718 1 = /dev/spx SVR3 local X interface
719 32 = /dev/inet/ip Network access
730 Additionally, iBCS-2 requires the following links:
732 /dev/ip -> /dev/inet/ip
733 /dev/icmp -> /dev/inet/icmp
734 /dev/ggp -> /dev/inet/ggp
735 /dev/ipip -> /dev/inet/ipip
736 /dev/tcp -> /dev/inet/tcp
737 /dev/egp -> /dev/inet/egp
738 /dev/pup -> /dev/inet/pup
739 /dev/udp -> /dev/inet/udp
740 /dev/idp -> /dev/inet/idp
741 /dev/rawip -> /dev/inet/rawip
742 /dev/inet/arp -> /dev/inet/udp
743 /dev/inet/rip -> /dev/inet/udp
744 /dev/nfsd -> /dev/socksys
745 /dev/X0R -> /dev/null (? apparently not required ?)
747 30 block Philips LMS CM-205 CD-ROM
748 0 = /dev/cm205cd Philips LMS CM-205 CD-ROM
750 /dev/lmscd is an older name for this device. This
751 driver does not work with the CM-205MS CD-ROM.
754 0 = /dev/mpu401data MPU-401 data port
755 1 = /dev/mpu401stat MPU-401 status port
756 31 block ROM/flash memory card
757 0 = /dev/rom0 First ROM card (rw)
759 7 = /dev/rom7 Eighth ROM card (rw)
760 8 = /dev/rrom0 First ROM card (ro)
762 15 = /dev/rrom7 Eighth ROM card (ro)
763 16 = /dev/flash0 First flash memory card (rw)
765 23 = /dev/flash7 Eighth flash memory card (rw)
766 24 = /dev/rflash0 First flash memory card (ro)
768 31 = /dev/rflash7 Eighth flash memory card (ro)
770 The read-write (rw) devices support back-caching
771 written data in RAM, as well as writing to flash RAM
772 devices. The read-only devices (ro) support reading
775 32 char Specialix serial card
776 0 = /dev/ttyX0 First Specialix port
777 1 = /dev/ttyX1 Second Specialix port
779 32 block Philips LMS CM-206 CD-ROM
780 0 = /dev/cm206cd Philips LMS CM-206 CD-ROM
782 33 char Specialix serial card - alternate devices
783 0 = /dev/cux0 Callout device for ttyX0
784 1 = /dev/cux1 Callout device for ttyX1
786 33 block Third IDE hard disk/CD-ROM interface
787 0 = /dev/hde Master: whole disk (or CD-ROM)
788 64 = /dev/hdf Slave: whole disk (or CD-ROM)
790 Partitions are handled the same way as for the first
791 interface (see major number 3).
793 34 char Z8530 HDLC driver
794 0 = /dev/scc0 First Z8530, first port
795 1 = /dev/scc1 First Z8530, second port
796 2 = /dev/scc2 Second Z8530, first port
797 3 = /dev/scc3 Second Z8530, second port
800 In a previous version these devices were named
801 /dev/sc1 for /dev/scc0, /dev/sc2 for /dev/scc1, and so
804 34 block Fourth IDE hard disk/CD-ROM interface
805 0 = /dev/hdg Master: whole disk (or CD-ROM)
806 64 = /dev/hdh Slave: whole disk (or CD-ROM)
808 Partitions are handled the same way as for the first
809 interface (see major number 3).
811 35 char tclmidi MIDI driver
812 0 = /dev/midi0 First MIDI port, kernel timed
813 1 = /dev/midi1 Second MIDI port, kernel timed
814 2 = /dev/midi2 Third MIDI port, kernel timed
815 3 = /dev/midi3 Fourth MIDI port, kernel timed
816 64 = /dev/rmidi0 First MIDI port, untimed
817 65 = /dev/rmidi1 Second MIDI port, untimed
818 66 = /dev/rmidi2 Third MIDI port, untimed
819 67 = /dev/rmidi3 Fourth MIDI port, untimed
820 128 = /dev/smpte0 First MIDI port, SMPTE timed
821 129 = /dev/smpte1 Second MIDI port, SMPTE timed
822 130 = /dev/smpte2 Third MIDI port, SMPTE timed
823 131 = /dev/smpte3 Fourth MIDI port, SMPTE timed
824 35 block Slow memory ramdisk
825 0 = /dev/slram Slow memory ramdisk
827 36 char Netlink support
828 0 = /dev/route Routing, device updates, kernel to user
829 1 = /dev/skip enSKIP security cache control
830 3 = /dev/fwmonitor Firewall packet copies
831 16 = /dev/tap0 First Ethertap device
833 31 = /dev/tap15 16th Ethertap device
834 36 block MCA ESDI hard disk
835 0 = /dev/eda First ESDI disk whole disk
836 64 = /dev/edb Second ESDI disk whole disk
839 Partitions are handled in the same way as IDE disks
840 (see major number 3).
843 0 = /dev/ht0 First IDE tape
844 1 = /dev/ht1 Second IDE tape
846 128 = /dev/nht0 First IDE tape, no rewind-on-close
847 129 = /dev/nht1 Second IDE tape, no rewind-on-close
850 Currently, only one IDE tape drive is supported.
852 37 block Zorro II ramdisk
853 0 = /dev/z2ram Zorro II ramdisk
855 38 char Myricom PCI Myrinet board
856 0 = /dev/mlanai0 First Myrinet board
857 1 = /dev/mlanai1 Second Myrinet board
860 This device is used for status query, board control
861 and "user level packet I/O." This board is also
862 accessible as a standard networking "eth" device.
864 38 block Reserved for Linux/AP+
866 39 char ML-16P experimental I/O board
867 0 = /dev/ml16pa-a0 First card, first analog channel
868 1 = /dev/ml16pa-a1 First card, second analog channel
870 15 = /dev/ml16pa-a15 First card, 16th analog channel
871 16 = /dev/ml16pa-d First card, digital lines
872 17 = /dev/ml16pa-c0 First card, first counter/timer
873 18 = /dev/ml16pa-c1 First card, second counter/timer
874 19 = /dev/ml16pa-c2 First card, third counter/timer
875 32 = /dev/ml16pb-a0 Second card, first analog channel
876 33 = /dev/ml16pb-a1 Second card, second analog channel
878 47 = /dev/ml16pb-a15 Second card, 16th analog channel
879 48 = /dev/ml16pb-d Second card, digital lines
880 49 = /dev/ml16pb-c0 Second card, first counter/timer
881 50 = /dev/ml16pb-c1 Second card, second counter/timer
882 51 = /dev/ml16pb-c2 Second card, third counter/timer
884 39 block Reserved for Linux/AP+
886 40 char Matrox Meteor frame grabber {2.6}
887 0 = /dev/mmetfgrab Matrox Meteor frame grabber
888 40 block Syquest EZ135 parallel port removable drive
889 0 = /dev/eza Parallel EZ135 drive, whole disk
891 This device is obsolete and will be removed in a
892 future version of Linux. It has been replaced with
893 the parallel port IDE disk driver at major number 45.
894 Partitions are handled in the same way as IDE disks
895 (see major number 3).
897 41 char Yet Another Micro Monitor
898 0 = /dev/yamm Yet Another Micro Monitor
899 41 block MicroSolutions BackPack parallel port CD-ROM
900 0 = /dev/bpcd BackPack CD-ROM
902 This device is obsolete and will be removed in a
903 future version of Linux. It has been replaced with
904 the parallel port ATAPI CD-ROM driver at major number 46.
906 42 char Demo/sample use
907 42 block Demo/sample use
909 This number is intended for use in sample code, as
910 well as a general "example" device number. It
911 should never be used for a device driver that is being
912 distributed; either obtain an official number or use
913 the local/experimental range. The sudden addition or
914 removal of a driver with this number should not cause
915 ill effects to the system (bugs excepted.)
917 IN PARTICULAR, ANY DISTRIBUTION WHICH CONTAINS A
918 DEVICE DRIVER USING MAJOR NUMBER 42 IS NONCOMPLIANT.
920 43 char isdn4linux virtual modem
921 0 = /dev/ttyI0 First virtual modem
923 63 = /dev/ttyI63 64th virtual modem
924 43 block Network block devices
925 0 = /dev/nb0 First network block device
926 1 = /dev/nb1 Second network block device
929 Network Block Device is somehow similar to loopback
930 devices: If you read from it, it sends packet across
931 network asking server for data. If you write to it, it
932 sends packet telling server to write. It could be used
933 to mounting filesystems over the net, swapping over
934 the net, implementing block device in userland etc.
936 44 char isdn4linux virtual modem - alternate devices
937 0 = /dev/cui0 Callout device for ttyI0
939 63 = /dev/cui63 Callout device for ttyI63
940 44 block Flash Translation Layer (FTL) filesystems
941 0 = /dev/ftla FTL on first Memory Technology Device
942 16 = /dev/ftlb FTL on second Memory Technology Device
943 32 = /dev/ftlc FTL on third Memory Technology Device
945 240 = /dev/ftlp FTL on 16th Memory Technology Device
947 Partitions are handled in the same way as for IDE
948 disks (see major number 3) expect that the partition
949 limit is 15 rather than 63 per disk (same as SCSI.)
951 45 char isdn4linux ISDN BRI driver
952 0 = /dev/isdn0 First virtual B channel raw data
954 63 = /dev/isdn63 64th virtual B channel raw data
955 64 = /dev/isdnctrl0 First channel control/debug
957 127 = /dev/isdnctrl63 64th channel control/debug
959 128 = /dev/ippp0 First SyncPPP device
961 191 = /dev/ippp63 64th SyncPPP device
963 255 = /dev/isdninfo ISDN monitor interface
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
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.
974 46 char Comtrol Rocketport serial card
975 0 = /dev/ttyR0 First Rocketport port
976 1 = /dev/ttyR1 Second Rocketport port
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
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
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
994 This driver is intended for floppy disks and similar
995 devices and hence does not support partitioning.
997 48 char SDL RISCom serial card
998 0 = /dev/ttyL0 First RISCom port
999 1 = /dev/ttyL1 Second RISCom port
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
1005 248 = /dev/rd/c0d31 32nd disk, whole disk
1008 0 = /dev/rd/c?d? Whole disk
1009 1 = /dev/rd/c?d?p1 First partition
1011 7 = /dev/rd/c?d?p7 Seventh partition
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
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
1021 248 = /dev/rd/c1d31 32nd disk, whole disk
1023 Partitions are handled as for major 48.
1025 50 char Reserved for GLINT
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
1031 248 = /dev/rd/c2d31 32nd disk, whole disk
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
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
1041 248 = /dev/rd/c3d31 32nd disk, whole disk
1043 Partitions are handled as for major 48.
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 52 block Mylex DAC960 PCI RAID controller; fifth controller
1051 0 = /dev/rd/c4d0 First disk, whole disk
1052 8 = /dev/rd/c4d1 Second disk, whole disk
1054 248 = /dev/rd/c4d31 32nd disk, whole disk
1056 Partitions are handled as for major 48.
1058 53 char BDM interface for remote debugging MC683xx microcontrollers
1059 0 = /dev/pd_bdm0 PD BDM interface on lp0
1060 1 = /dev/pd_bdm1 PD BDM interface on lp1
1061 2 = /dev/pd_bdm2 PD BDM interface on lp2
1062 4 = /dev/icd_bdm0 ICD BDM interface on lp0
1063 5 = /dev/icd_bdm1 ICD BDM interface on lp1
1064 6 = /dev/icd_bdm2 ICD BDM interface on lp2
1066 This device is used for the interfacing to the MC683xx
1067 microcontrollers via Background Debug Mode by use of a
1068 Parallel Port interface. PD is the Motorola Public
1069 Domain Interface and ICD is the commercial interface
1072 53 block Mylex DAC960 PCI RAID controller; sixth controller
1073 0 = /dev/rd/c5d0 First disk, whole disk
1074 8 = /dev/rd/c5d1 Second disk, whole disk
1076 248 = /dev/rd/c5d31 32nd disk, whole disk
1078 Partitions are handled as for major 48.
1080 54 char Electrocardiognosis Holter serial card
1081 0 = /dev/holter0 First Holter port
1082 1 = /dev/holter1 Second Holter port
1083 2 = /dev/holter2 Third Holter port
1085 A custom serial card used by Electrocardiognosis SRL
1086 <mseritan@ottonel.pub.ro> to transfer data from Holter
1087 24-hour heart monitoring equipment.
1089 54 block Mylex DAC960 PCI RAID controller; seventh controller
1090 0 = /dev/rd/c6d0 First disk, whole disk
1091 8 = /dev/rd/c6d1 Second disk, whole disk
1093 248 = /dev/rd/c6d31 32nd disk, whole disk
1095 Partitions are handled as for major 48.
1097 55 char DSP56001 digital signal processor
1098 0 = /dev/dsp56k First DSP56001
1099 55 block Mylex DAC960 PCI RAID controller; eigth controller
1100 0 = /dev/rd/c7d0 First disk, whole disk
1101 8 = /dev/rd/c7d1 Second disk, whole disk
1103 248 = /dev/rd/c7d31 32nd disk, whole disk
1105 Partitions are handled as for major 48.
1107 56 char Apple Desktop Bus
1108 0 = /dev/adb ADB bus control
1110 Additional devices will be added to this number, all
1111 starting with /dev/adb.
1113 56 block Fifth IDE hard disk/CD-ROM interface
1114 0 = /dev/hdi Master: whole disk (or CD-ROM)
1115 64 = /dev/hdj Slave: whole disk (or CD-ROM)
1117 Partitions are handled the same way as for the first
1118 interface (see major number 3).
1120 57 char Hayes ESP serial card
1121 0 = /dev/ttyP0 First ESP port
1122 1 = /dev/ttyP1 Second ESP port
1125 57 block Sixth IDE hard disk/CD-ROM interface
1126 0 = /dev/hdk Master: whole disk (or CD-ROM)
1127 64 = /dev/hdl Slave: whole disk (or CD-ROM)
1129 Partitions are handled the same way as for the first
1130 interface (see major number 3).
1132 58 char Hayes ESP serial card - alternate devices
1133 0 = /dev/cup0 Callout device for ttyP0
1134 1 = /dev/cup1 Callout device for ttyP1
1136 58 block Reserved for logical volume manager
1138 59 char sf firewall package
1139 0 = /dev/firewall Communication with sf kernel module
1141 59 block Generic PDA filesystem device
1142 0 = /dev/pda0 First PDA device
1143 1 = /dev/pda1 Second PDA device
1146 The pda devices are used to mount filesystems on
1147 remote pda's (basically slow handheld machines with
1148 proprietary OS's and limited memory and storage
1149 running small fs translation drivers) through serial /
1150 IRDA / parallel links.
1152 NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc
1154 60-63 char LOCAL/EXPERIMENTAL USE
1155 60-63 block LOCAL/EXPERIMENTAL USE
1156 Allocated for local/experimental use. For devices not
1157 assigned official numbers, these ranges should be
1158 used in order to avoid conflicting with future assignments.
1160 64 char ENskip kernel encryption package
1161 0 = /dev/enskip Communication with ENskip kernel module
1163 64 block Scramdisk/DriveCrypt encrypted devices
1164 0 = /dev/scramdisk/master Master node for ioctls
1165 1 = /dev/scramdisk/1 First encrypted device
1166 2 = /dev/scramdisk/2 Second encrypted device
1168 255 = /dev/scramdisk/255 255th encrypted device
1170 The filename of the encrypted container and the passwords
1171 are sent via ioctls (using the sdmount tool) to the master
1172 node which then activates them via one of the
1173 /dev/scramdisk/x nodes for loopback mounting (all handled
1174 through the sdmount tool).
1176 Requested by: andy@scramdisklinux.org
1178 65 char Sundance "plink" Transputer boards
1179 0 = /dev/plink0 First plink device
1180 1 = /dev/plink1 Second plink device
1181 2 = /dev/plink2 Third plink device
1182 3 = /dev/plink3 Fourth plink device
1183 64 = /dev/rplink0 First plink device, raw
1184 65 = /dev/rplink1 Second plink device, raw
1185 66 = /dev/rplink2 Third plink device, raw
1186 67 = /dev/rplink3 Fourth plink device, raw
1187 128 = /dev/plink0d First plink device, debug
1188 129 = /dev/plink1d Second plink device, debug
1189 130 = /dev/plink2d Third plink device, debug
1190 131 = /dev/plink3d Fourth plink device, debug
1191 192 = /dev/rplink0d First plink device, raw, debug
1192 193 = /dev/rplink1d Second plink device, raw, debug
1193 194 = /dev/rplink2d Third plink device, raw, debug
1194 195 = /dev/rplink3d Fourth plink device, raw, debug
1196 This is a commercial driver; contact James Howes
1197 <jth@prosig.demon.co.uk> for information.
1199 65 block SCSI disk devices (16-31)
1200 0 = /dev/sdq 17th SCSI disk whole disk
1201 16 = /dev/sdr 18th SCSI disk whole disk
1202 32 = /dev/sds 19th SCSI disk whole disk
1204 240 = /dev/sdaf 32nd SCSI disk whole disk
1206 Partitions are handled in the same way as for IDE
1207 disks (see major number 3) except that the limit on
1210 66 char YARC PowerPC PCI coprocessor card
1211 0 = /dev/yppcpci0 First YARC card
1212 1 = /dev/yppcpci1 Second YARC card
1215 66 block SCSI disk devices (32-47)
1216 0 = /dev/sdag 33th SCSI disk whole disk
1217 16 = /dev/sdah 34th SCSI disk whole disk
1218 32 = /dev/sdai 35th SCSI disk whole disk
1220 240 = /dev/sdav 48nd SCSI disk whole disk
1222 Partitions are handled in the same way as for IDE
1223 disks (see major number 3) except that the limit on
1226 67 char Coda network file system
1227 0 = /dev/cfs0 Coda cache manager
1229 See http://www.coda.cs.cmu.edu for information about Coda.
1231 67 block SCSI disk devices (48-63)
1232 0 = /dev/sdaw 49th SCSI disk whole disk
1233 16 = /dev/sdax 50th SCSI disk whole disk
1234 32 = /dev/sday 51st SCSI disk whole disk
1236 240 = /dev/sdbl 64th SCSI disk whole disk
1238 Partitions are handled in the same way as for IDE
1239 disks (see major number 3) except that the limit on
1242 68 char CAPI 2.0 interface
1243 0 = /dev/capi20 Control device
1244 1 = /dev/capi20.00 First CAPI 2.0 application
1245 2 = /dev/capi20.01 Second CAPI 2.0 application
1247 20 = /dev/capi20.19 19th CAPI 2.0 application
1249 ISDN CAPI 2.0 driver for use with CAPI 2.0
1250 applications; currently supports the AVM B1 card.
1252 68 block SCSI disk devices (64-79)
1253 0 = /dev/sdbm 65th SCSI disk whole disk
1254 16 = /dev/sdbn 66th SCSI disk whole disk
1255 32 = /dev/sdbo 67th SCSI disk whole disk
1257 240 = /dev/sdcb 80th SCSI disk whole disk
1259 Partitions are handled in the same way as for IDE
1260 disks (see major number 3) except that the limit on
1263 69 char MA16 numeric accelerator card
1264 0 = /dev/ma16 Board memory access
1266 69 block SCSI disk devices (80-95)
1267 0 = /dev/sdcc 81st SCSI disk whole disk
1268 16 = /dev/sdcd 82nd SCSI disk whole disk
1269 32 = /dev/sdce 83th SCSI disk whole disk
1271 240 = /dev/sdcr 96th SCSI disk whole disk
1273 Partitions are handled in the same way as for IDE
1274 disks (see major number 3) except that the limit on
1277 70 char SpellCaster Protocol Services Interface
1278 0 = /dev/apscfg Configuration interface
1279 1 = /dev/apsauth Authentication interface
1280 2 = /dev/apslog Logging interface
1281 3 = /dev/apsdbg Debugging interface
1282 64 = /dev/apsisdn ISDN command interface
1283 65 = /dev/apsasync Async command interface
1284 128 = /dev/apsmon Monitor interface
1286 70 block SCSI disk devices (96-111)
1287 0 = /dev/sdcs 97th SCSI disk whole disk
1288 16 = /dev/sdct 98th SCSI disk whole disk
1289 32 = /dev/sdcu 99th SCSI disk whole disk
1291 240 = /dev/sddh 112nd SCSI disk whole disk
1293 Partitions are handled in the same way as for IDE
1294 disks (see major number 3) except that the limit on
1297 71 char Computone IntelliPort II serial card
1298 0 = /dev/ttyF0 IntelliPort II board 0, port 0
1299 1 = /dev/ttyF1 IntelliPort II board 0, port 1
1301 63 = /dev/ttyF63 IntelliPort II board 0, port 63
1302 64 = /dev/ttyF64 IntelliPort II board 1, port 0
1303 65 = /dev/ttyF65 IntelliPort II board 1, port 1
1305 127 = /dev/ttyF127 IntelliPort II board 1, port 63
1306 128 = /dev/ttyF128 IntelliPort II board 2, port 0
1307 129 = /dev/ttyF129 IntelliPort II board 2, port 1
1309 191 = /dev/ttyF191 IntelliPort II board 2, port 63
1310 192 = /dev/ttyF192 IntelliPort II board 3, port 0
1311 193 = /dev/ttyF193 IntelliPort II board 3, port 1
1313 255 = /dev/ttyF255 IntelliPort II board 3, port 63
1315 71 block SCSI disk devices (112-127)
1316 0 = /dev/sddi 113th SCSI disk whole disk
1317 16 = /dev/sddj 114th SCSI disk whole disk
1318 32 = /dev/sddk 115th SCSI disk whole disk
1320 240 = /dev/sddx 128th SCSI disk whole disk
1322 Partitions are handled in the same way as for IDE
1323 disks (see major number 3) except that the limit on
1326 72 char Computone IntelliPort II serial card - alternate devices
1327 0 = /dev/cuf0 Callout device for ttyF0
1328 1 = /dev/cuf1 Callout device for ttyF1
1330 63 = /dev/cuf63 Callout device for ttyF63
1331 64 = /dev/cuf64 Callout device for ttyF64
1332 65 = /dev/cuf65 Callout device for ttyF65
1334 127 = /dev/cuf127 Callout device for ttyF127
1335 128 = /dev/cuf128 Callout device for ttyF128
1336 129 = /dev/cuf129 Callout device for ttyF129
1338 191 = /dev/cuf191 Callout device for ttyF191
1339 192 = /dev/cuf192 Callout device for ttyF192
1340 193 = /dev/cuf193 Callout device for ttyF193
1342 255 = /dev/cuf255 Callout device for ttyF255
1344 72 block Compaq Intelligent Drive Array, first controller
1345 0 = /dev/ida/c0d0 First logical drive whole disk
1346 16 = /dev/ida/c0d1 Second logical drive whole disk
1348 240 = /dev/ida/c0d15 16th logical drive whole disk
1350 Partitions are handled the same way as for Mylex
1351 DAC960 (see major number 48) except that the limit on
1354 73 char Computone IntelliPort II serial card - control devices
1355 0 = /dev/ip2ipl0 Loadware device for board 0
1356 1 = /dev/ip2stat0 Status device for board 0
1357 4 = /dev/ip2ipl1 Loadware device for board 1
1358 5 = /dev/ip2stat1 Status device for board 1
1359 8 = /dev/ip2ipl2 Loadware device for board 2
1360 9 = /dev/ip2stat2 Status device for board 2
1361 12 = /dev/ip2ipl3 Loadware device for board 3
1362 13 = /dev/ip2stat3 Status device for board 3
1364 73 block Compaq Intelligent Drive Array, second controller
1365 0 = /dev/ida/c1d0 First logical drive whole disk
1366 16 = /dev/ida/c1d1 Second logical drive whole disk
1368 240 = /dev/ida/c1d15 16th logical drive whole disk
1370 Partitions are handled the same way as for Mylex
1371 DAC960 (see major number 48) except that the limit on
1375 0 = /dev/SCI/0 SCI device 0
1376 1 = /dev/SCI/1 SCI device 1
1379 Currently for Dolphin Interconnect Solutions' PCI-SCI
1382 74 block Compaq Intelligent Drive Array, third controller
1383 0 = /dev/ida/c2d0 First logical drive whole disk
1384 16 = /dev/ida/c2d1 Second logical drive whole disk
1386 240 = /dev/ida/c2d15 16th logical drive whole disk
1388 Partitions are handled the same way as for Mylex
1389 DAC960 (see major number 48) except that the limit on
1392 75 char Specialix IO8+ serial card
1393 0 = /dev/ttyW0 First IO8+ port, first card
1394 1 = /dev/ttyW1 Second IO8+ port, first card
1396 8 = /dev/ttyW8 First IO8+ port, second card
1399 75 block Compaq Intelligent Drive Array, fourth controller
1400 0 = /dev/ida/c3d0 First logical drive whole disk
1401 16 = /dev/ida/c3d1 Second logical drive whole disk
1403 240 = /dev/ida/c3d15 16th logical drive whole disk
1405 Partitions are handled the same way as for Mylex
1406 DAC960 (see major number 48) except that the limit on
1409 76 char Specialix IO8+ serial card - alternate devices
1410 0 = /dev/cuw0 Callout device for ttyW0
1411 1 = /dev/cuw1 Callout device for ttyW1
1413 8 = /dev/cuw8 Callout device for ttyW8
1416 76 block Compaq Intelligent Drive Array, fifth controller
1417 0 = /dev/ida/c4d0 First logical drive whole disk
1418 16 = /dev/ida/c4d1 Second logical drive whole disk
1420 240 = /dev/ida/c4d15 16th logical drive whole disk
1422 Partitions are handled the same way as for Mylex
1423 DAC960 (see major number 48) except that the limit on
1427 77 char ComScire Quantum Noise Generator
1428 0 = /dev/qng ComScire Quantum Noise Generator
1430 77 block Compaq Intelligent Drive Array, sixth controller
1431 0 = /dev/ida/c5d0 First logical drive whole disk
1432 16 = /dev/ida/c5d1 Second logical drive whole disk
1434 240 = /dev/ida/c5d15 16th logical drive whole disk
1436 Partitions are handled the same way as for Mylex
1437 DAC960 (see major number 48) except that the limit on
1441 78 char PAM Software's multimodem boards
1442 0 = /dev/ttyM0 First PAM modem
1443 1 = /dev/ttyM1 Second PAM modem
1446 78 block Compaq Intelligent Drive Array, seventh controller
1447 0 = /dev/ida/c6d0 First logical drive whole disk
1448 16 = /dev/ida/c6d1 Second logical drive whole disk
1450 240 = /dev/ida/c6d15 16th logical drive whole disk
1452 Partitions are handled the same way as for Mylex
1453 DAC960 (see major number 48) except that the limit on
1457 79 char PAM Software's multimodem boards - alternate devices
1458 0 = /dev/cum0 Callout device for ttyM0
1459 1 = /dev/cum1 Callout device for ttyM1
1462 79 block Compaq Intelligent Drive Array, eigth controller
1463 0 = /dev/ida/c7d0 First logical drive whole disk
1464 16 = /dev/ida/c7d1 Second logical drive whole disk
1466 240 = /dev/ida/c715 16th logical drive whole disk
1468 Partitions are handled the same way as for Mylex
1469 DAC960 (see major number 48) except that the limit on
1473 80 char Photometrics AT200 CCD camera
1474 0 = /dev/at200 Photometrics AT200 CCD camera
1476 80 block I2O hard disk
1477 0 = /dev/i2o/hda First I2O hard disk, whole disk
1478 16 = /dev/i2o/hdb Second I2O hard disk, whole disk
1480 240 = /dev/i2o/hdp 16th I2O hard disk, whole disk
1482 Partitions are handled in the same way as for IDE
1483 disks (see major number 3) except that the limit on
1487 0 = /dev/video0 Video capture/overlay device
1489 63 = /dev/video63 Video capture/overlay device
1490 64 = /dev/radio0 Radio device
1492 127 = /dev/radio63 Radio device
1493 192 = /dev/vtx0 Teletext device
1495 223 = /dev/vtx31 Teletext device
1496 224 = /dev/vbi0 Vertical blank interrupt
1498 255 = /dev/vbi31 Vertical blank interrupt
1500 81 block I2O hard disk
1501 0 = /dev/i2o/hdq 17th I2O hard disk, whole disk
1502 16 = /dev/i2o/hdr 18th I2O hard disk, whole disk
1504 240 = /dev/i2o/hdaf 32nd I2O hard disk, whole disk
1506 Partitions are handled in the same way as for IDE
1507 disks (see major number 3) except that the limit on
1510 82 char WiNRADiO communications receiver card
1511 0 = /dev/winradio0 First WiNRADiO card
1512 1 = /dev/winradio1 Second WiNRADiO card
1515 The driver and documentation may be obtained from
1516 http://www.proximity.com.au/~brian/winradio/
1518 82 block I2O hard disk
1519 0 = /dev/i2o/hdag 33rd I2O hard disk, whole disk
1520 16 = /dev/i2o/hdah 34th I2O hard disk, whole disk
1522 240 = /dev/i2o/hdav 48th I2O hard disk, whole disk
1524 Partitions are handled in the same way as for IDE
1525 disks (see major number 3) except that the limit on
1528 83 char Teletext/videotext interfaces {2.6}
1529 0 = /dev/vtx Teletext decoder
1530 16 = /dev/vttuner TV tuner on teletext interface
1532 Devices for the driver contained in the VideoteXt package.
1533 More information on http://home.pages.de/~videotext/
1535 83 block I2O hard disk
1536 0 = /dev/i2o/hdaw 49th I2O hard disk, whole disk
1537 16 = /dev/i2o/hdax 50th I2O hard disk, whole disk
1539 240 = /dev/i2o/hdbl 64th I2O hard disk, whole disk
1541 Partitions are handled in the same way as for IDE
1542 disks (see major number 3) except that the limit on
1545 84 char Ikon 1011[57] Versatec Greensheet Interface
1546 0 = /dev/ihcp0 First Greensheet port
1547 1 = /dev/ihcp1 Second Greensheet port
1549 84 block I2O hard disk
1550 0 = /dev/i2o/hdbm 65th I2O hard disk, whole disk
1551 16 = /dev/i2o/hdbn 66th I2O hard disk, whole disk
1553 240 = /dev/i2o/hdcb 80th I2O hard disk, whole disk
1555 Partitions are handled in the same way as for IDE
1556 disks (see major number 3) except that the limit on
1559 85 char Linux/SGI shared memory input queue
1560 0 = /dev/shmiq Master shared input queue
1561 1 = /dev/qcntl0 First device pushed
1562 2 = /dev/qcntl1 Second device pushed
1565 85 block I2O hard disk
1566 0 = /dev/i2o/hdcc 81st I2O hard disk, whole disk
1567 16 = /dev/i2o/hdcd 82nd I2O hard disk, whole disk
1569 240 = /dev/i2o/hdcr 96th I2O hard disk, whole disk
1571 Partitions are handled in the same way as for IDE
1572 disks (see major number 3) except that the limit on
1575 86 char SCSI media changer
1576 0 = /dev/sch0 First SCSI media changer
1577 1 = /dev/sch1 Second SCSI media changer
1580 86 block I2O hard disk
1581 0 = /dev/i2o/hdcs 97th I2O hard disk, whole disk
1582 16 = /dev/i2o/hdct 98th I2O hard disk, whole disk
1584 240 = /dev/i2o/hddh 112th I2O hard disk, whole disk
1586 Partitions are handled in the same way as for IDE
1587 disks (see major number 3) except that the limit on
1590 87 char Sony Control-A1 stereo control bus
1591 0 = /dev/controla0 First device on chain
1592 1 = /dev/controla1 Second device on chain
1595 87 block I2O hard disk
1596 0 = /dev/i2o/hddi 113rd I2O hard disk, whole disk
1597 16 = /dev/i2o/hddj 114th I2O hard disk, whole disk
1599 240 = /dev/i2o/hddx 128th I2O hard disk, whole disk
1601 Partitions are handled in the same way as for IDE
1602 disks (see major number 3) except that the limit on
1605 88 char COMX synchronous serial card
1606 0 = /dev/comx0 COMX channel 0
1607 1 = /dev/comx1 COMX channel 1
1610 88 block Seventh IDE hard disk/CD-ROM interface
1611 0 = /dev/hdm Master: whole disk (or CD-ROM)
1612 64 = /dev/hdn Slave: whole disk (or CD-ROM)
1614 Partitions are handled the same way as for the first
1615 interface (see major number 3).
1617 89 char I2C bus interface
1618 0 = /dev/i2c-0 First I2C adapter
1619 1 = /dev/i2c-1 Second I2C adapter
1622 89 block Eighth IDE hard disk/CD-ROM interface
1623 0 = /dev/hdo Master: whole disk (or CD-ROM)
1624 64 = /dev/hdp Slave: whole disk (or CD-ROM)
1626 Partitions are handled the same way as for the first
1627 interface (see major number 3).
1629 90 char Memory Technology Device (RAM, ROM, Flash)
1630 0 = /dev/mtd0 First MTD (rw)
1631 1 = /dev/mtdr0 First MTD (ro)
1633 30 = /dev/mtd15 16th MTD (rw)
1634 31 = /dev/mtdr15 16th MTD (ro)
1636 90 block Ninth IDE hard disk/CD-ROM interface
1637 0 = /dev/hdq Master: whole disk (or CD-ROM)
1638 64 = /dev/hdr Slave: whole disk (or CD-ROM)
1640 Partitions are handled the same way as for the first
1641 interface (see major number 3).
1643 91 char CAN-Bus devices
1644 0 = /dev/can0 First CAN-Bus controller
1645 1 = /dev/can1 Second CAN-Bus controller
1648 91 block Tenth IDE hard disk/CD-ROM interface
1649 0 = /dev/hds Master: whole disk (or CD-ROM)
1650 64 = /dev/hdt Slave: whole disk (or CD-ROM)
1652 Partitions are handled the same way as for the first
1653 interface (see major number 3).
1655 92 char Reserved for ith Kommunikationstechnik MIC ISDN card
1657 92 block PPDD encrypted disk driver
1658 0 = /dev/ppdd0 First encrypted disk
1659 1 = /dev/ppdd1 Second encrypted disk
1662 Partitions are handled in the same way as for IDE
1663 disks (see major number 3) except that the limit on
1666 93 char IBM Smart Capture Card frame grabber {2.6}
1667 0 = /dev/iscc0 First Smart Capture Card
1668 1 = /dev/iscc1 Second Smart Capture Card
1670 128 = /dev/isccctl0 First Smart Capture Card control
1671 129 = /dev/isccctl1 Second Smart Capture Card control
1674 93 block NAND Flash Translation Layer filesystem
1675 0 = /dev/nftla First NFTL layer
1676 16 = /dev/nftlb Second NFTL layer
1678 240 = /dev/nftlp 16th NTFL layer
1680 94 char miroVIDEO DC10/30 capture/playback device {2.6}
1681 0 = /dev/dcxx0 First capture card
1682 1 = /dev/dcxx1 Second capture card
1685 94 block Inverse NAND Flash Translation Layer
1686 0 = /dev/inftla First INFTL layer
1687 16 = /dev/inftlb Second INFTL layer
1689 240 = /dev/inftlp 16th INTFL layer
1692 0 = /dev/ipl Filter control device/log file
1693 1 = /dev/ipnat NAT control device/log file
1694 2 = /dev/ipstate State information log file
1695 3 = /dev/ipauth Authentication control device/log file
1698 95 block IBM S/390 DASD block storage
1699 0 = /dev/dasd0 First DASD device, major
1700 1 = /dev/dasd0a First DASD device, block 1
1701 2 = /dev/dasd0b First DASD device, block 2
1702 3 = /dev/dasd0c First DASD device, block 3
1703 4 = /dev/dasd1 Second DASD device, major
1704 5 = /dev/dasd1a Second DASD device, block 1
1705 6 = /dev/dasd1b Second DASD device, block 2
1706 7 = /dev/dasd1c Second DASD device, block 3
1709 96 char Parallel port ATAPI tape devices
1710 0 = /dev/pt0 First parallel port ATAPI tape
1711 1 = /dev/pt1 Second parallel port ATAPI tape
1713 128 = /dev/npt0 First p.p. ATAPI tape, no rewind
1714 129 = /dev/npt1 Second p.p. ATAPI tape, no rewind
1717 96 block IBM S/390 VM/ESA minidisk
1718 0 = /dev/msd0 First VM/ESA minidisk
1719 1 = /dev/msd1 Second VM/ESA minidisk
1722 97 char Parallel port generic ATAPI interface
1723 0 = /dev/pg0 First parallel port ATAPI device
1724 1 = /dev/pg1 Second parallel port ATAPI device
1725 2 = /dev/pg2 Third parallel port ATAPI device
1726 3 = /dev/pg3 Fourth parallel port ATAPI device
1728 These devices support the same API as the generic SCSI
1731 97 block Packet writing for CD/DVD devices
1732 0 = /dev/pktcdvd0 First packet-writing module
1733 1 = /dev/pktcdvd1 Second packet-writing module
1736 98 char Control and Measurement Device (comedi)
1737 0 = /dev/comedi0 First comedi device
1738 1 = /dev/comedi1 Second comedi device
1741 See http://stm.lbl.gov/comedi or http://www.llp.fu-berlin.de/.
1743 98 block User-mode virtual block device
1744 0 = /dev/ubd0 First user-mode block device
1745 1 = /dev/ubd1 Second user-mode block device
1748 This device is used by the user-mode virtual kernel port.
1750 99 char Raw parallel ports
1751 0 = /dev/parport0 First parallel port
1752 1 = /dev/parport1 Second parallel port
1755 99 block JavaStation flash disk
1756 0 = /dev/jsfd JavaStation flash disk
1758 100 char Telephony for Linux
1759 0 = /dev/phone0 First telephony device
1760 1 = /dev/phone1 Second telephony device
1763 101 char Motorola DSP 56xxx board
1764 0 = /dev/mdspstat Status information
1765 1 = /dev/mdsp1 First DSP board I/O controls
1767 16 = /dev/mdsp16 16th DSP board I/O controls
1769 101 block AMI HyperDisk RAID controller
1770 0 = /dev/amiraid/ar0 First array whole disk
1771 16 = /dev/amiraid/ar1 Second array whole disk
1773 240 = /dev/amiraid/ar15 16th array whole disk
1775 For each device, partitions are added as:
1776 0 = /dev/amiraid/ar? Whole disk
1777 1 = /dev/amiraid/ar?p1 First partition
1778 2 = /dev/amiraid/ar?p2 Second partition
1780 15 = /dev/amiraid/ar?p15 15th partition
1782 102 char Philips SAA5249 Teletext signal decoder {2.6}
1783 0 = /dev/tlk0 First Teletext decoder
1784 1 = /dev/tlk1 Second Teletext decoder
1785 2 = /dev/tlk2 Third Teletext decoder
1786 3 = /dev/tlk3 Fourth Teletext decoder
1788 102 block Compressed block device
1789 0 = /dev/cbd/a First compressed block device, whole device
1790 16 = /dev/cbd/b Second compressed block device, whole device
1792 240 = /dev/cbd/p 16th compressed block device, whole device
1794 Partitions are handled in the same way as for IDE
1795 disks (see major number 3) except that the limit on
1798 103 char Arla network file system
1799 0 = /dev/xfs0 Arla XFS
1801 Arla is a free clone of the Andrew File System, AFS.
1802 Any resemblance with the Swedish milk producer is
1803 coincidental. For more information about the project,
1804 write to <arla-drinkers@stacken.kth.se> or subscribe
1805 to the arla announce mailing list by sending a mail to
1806 <arla-announce-request@stacken.kth.se>.
1808 103 block Audit device
1809 0 = /dev/audit Audit device
1811 104 char Flash BIOS support
1813 104 block Compaq Next Generation Drive Array, first controller
1814 0 = /dev/cciss/c0d0 First logical drive, whole disk
1815 16 = /dev/cciss/c0d1 Second logical drive, whole disk
1817 240 = /dev/cciss/c0d15 16th logical drive, whole disk
1819 Partitions are handled the same way as for Mylex
1820 DAC960 (see major number 48) except that the limit on
1823 105 char Comtrol VS-1000 serial controller
1824 0 = /dev/ttyV0 First VS-1000 port
1825 1 = /dev/ttyV1 Second VS-1000 port
1828 105 block Compaq Next Generation Drive Array, second controller
1829 0 = /dev/cciss/c1d0 First logical drive, whole disk
1830 16 = /dev/cciss/c1d1 Second logical drive, whole disk
1832 240 = /dev/cciss/c1d15 16th logical drive, whole disk
1834 Partitions are handled the same way as for Mylex
1835 DAC960 (see major number 48) except that the limit on
1838 106 char Comtrol VS-1000 serial controller - alternate devices
1839 0 = /dev/cuv0 First VS-1000 port
1840 1 = /dev/cuv1 Second VS-1000 port
1843 106 block Compaq Next Generation Drive Array, third controller
1844 0 = /dev/cciss/c2d0 First logical drive, whole disk
1845 16 = /dev/cciss/c2d1 Second logical drive, whole disk
1847 240 = /dev/cciss/c2d15 16th logical drive, whole disk
1849 Partitions are handled the same way as for Mylex
1850 DAC960 (see major number 48) except that the limit on
1853 107 char 3Dfx Voodoo Graphics device
1854 0 = /dev/3dfx Primary 3Dfx graphics device
1856 107 block Compaq Next Generation Drive Array, fourth controller
1857 0 = /dev/cciss/c3d0 First logical drive, whole disk
1858 16 = /dev/cciss/c3d1 Second logical drive, whole disk
1860 240 = /dev/cciss/c3d15 16th logical drive, whole disk
1862 Partitions are handled the same way as for Mylex
1863 DAC960 (see major number 48) except that the limit on
1866 108 char Device independent PPP interface
1867 0 = /dev/ppp Device independent PPP interface
1869 108 block Compaq Next Generation Drive Array, fifth controller
1870 0 = /dev/cciss/c4d0 First logical drive, whole disk
1871 16 = /dev/cciss/c4d1 Second logical drive, whole disk
1873 240 = /dev/cciss/c4d15 16th logical drive, whole disk
1875 Partitions are handled the same way as for Mylex
1876 DAC960 (see major number 48) except that the limit on
1879 109 char Reserved for logical volume manager
1881 109 block Compaq Next Generation Drive Array, sixth controller
1882 0 = /dev/cciss/c5d0 First logical drive, whole disk
1883 16 = /dev/cciss/c5d1 Second logical drive, whole disk
1885 240 = /dev/cciss/c5d15 16th logical drive, whole disk
1887 Partitions are handled the same way as for Mylex
1888 DAC960 (see major number 48) except that the limit on
1891 110 char miroMEDIA Surround board
1892 0 = /dev/srnd0 First miroMEDIA Surround board
1893 1 = /dev/srnd1 Second miroMEDIA Surround board
1896 110 block Compaq Next Generation Drive Array, seventh controller
1897 0 = /dev/cciss/c6d0 First logical drive, whole disk
1898 16 = /dev/cciss/c6d1 Second logical drive, whole disk
1900 240 = /dev/cciss/c6d15 16th logical drive, whole disk
1902 Partitions are handled the same way as for Mylex
1903 DAC960 (see major number 48) except that the limit on
1906 111 char Philips SAA7146-based audio/video card {2.6}
1907 0 = /dev/av0 First A/V card
1908 1 = /dev/av1 Second A/V card
1911 111 block Compaq Next Generation Drive Array, eigth controller
1912 0 = /dev/cciss/c7d0 First logical drive, whole disk
1913 16 = /dev/cciss/c7d1 Second logical drive, whole disk
1915 240 = /dev/cciss/c7d15 16th logical drive, whole disk
1917 Partitions are handled the same way as for Mylex
1918 DAC960 (see major number 48) except that the limit on
1921 112 char ISI serial card
1922 0 = /dev/ttyM0 First ISI port
1923 1 = /dev/ttyM1 Second ISI port
1926 There is currently a device-naming conflict between
1927 these and PAM multimodems (major 78).
1929 112 block IBM iSeries virtual disk
1930 0 = /dev/iseries/vda First virtual disk, whole disk
1931 8 = /dev/iseries/vdb Second virtual disk, whole disk
1933 200 = /dev/iseries/vdz 26th virtual disk, whole disk
1934 208 = /dev/iseries/vdaa 27th virtual disk, whole disk
1936 248 = /dev/iseries/vdaf 32nd virtual disk, whole disk
1938 Partitions are handled in the same way as for IDE
1939 disks (see major number 3) except that the limit on
1942 113 char ISI serial card - alternate devices
1943 0 = /dev/cum0 Callout device for ttyM0
1944 1 = /dev/cum1 Callout device for ttyM1
1947 113 block IBM iSeries virtual CD-ROM
1949 0 = /dev/iseries/vcda First virtual CD-ROM
1950 1 = /dev/iseries/vcdb Second virtual CD-ROM
1953 114 char Picture Elements ISE board
1954 0 = /dev/ise0 First ISE board
1955 1 = /dev/ise1 Second ISE board
1957 128 = /dev/isex0 Control node for first ISE board
1958 129 = /dev/isex1 Control node for second ISE board
1961 The ISE board is an embedded computer, optimized for
1962 image processing. The /dev/iseN nodes are the general
1963 I/O access to the board, the /dev/isex0 nodes command
1964 nodes used to control the board.
1966 114 block IDE BIOS powered software RAID interfaces such as the
1970 1 = /dev/ataraid/d0p1
1971 2 = /dev/ataraid/d0p2
1973 16 = /dev/ataraid/d1
1974 17 = /dev/ataraid/d1p1
1975 18 = /dev/ataraid/d1p2
1977 255 = /dev/ataraid/d15p15
1979 Partitions are handled in the same way as for IDE
1980 disks (see major number 3) except that the limit on
1983 115 char TI link cable devices (115 was formerly the console driver speaker)
1984 0 = /dev/tipar0 Parallel cable on first parallel port
1986 7 = /dev/tipar7 Parallel cable on seventh parallel port
1988 8 = /dev/tiser0 Serial cable on first serial port
1990 15 = /dev/tiser7 Serial cable on seventh serial port
1992 16 = /dev/tiusb0 First USB cable
1994 47 = /dev/tiusb31 32nd USB cable
1996 115 block NetWare (NWFS) Devices (0-255)
1998 The NWFS (NetWare) devices are used to present a
1999 collection of NetWare Mirror Groups or NetWare
2000 Partitions as a logical storage segment for
2001 use in mounting NetWare volumes. A maximum of
2002 256 NetWare volumes can be supported in a single
2005 http://www.kernel.org/pub/linux/kernel/people/jmerkey/nwfs
2007 0 = /dev/nwfs/v0 First NetWare (NWFS) Logical Volume
2008 1 = /dev/nwfs/v1 Second NetWare (NWFS) Logical Volume
2009 2 = /dev/nwfs/v2 Third NetWare (NWFS) Logical Volume
2011 255 = /dev/nwfs/v255 Last NetWare (NWFS) Logical Volume
2013 116 char Advanced Linux Sound Driver (ALSA)
2015 116 block MicroMemory battery backed RAM adapter (NVRAM)
2016 Supports 16 boards, 15 paritions each.
2017 Requested by neilb at cse.unsw.edu.au.
2019 0 = /dev/umem/d0 Whole of first board
2020 1 = /dev/umem/d0p1 First partition of first board
2021 2 = /dev/umem/d0p2 Second partition of first board
2022 15 = /dev/umem/d0p15 15th partition of first board
2024 16 = /dev/umem/d1 Whole of second board
2025 17 = /dev/umem/d1p1 First partition of second board
2027 255= /dev/umem/d15p15 15th partition of 16th board.
2029 117 char COSA/SRP synchronous serial card
2030 0 = /dev/cosa0c0 1st board, 1st channel
2031 1 = /dev/cosa0c1 1st board, 2nd channel
2033 16 = /dev/cosa1c0 2nd board, 1st channel
2034 17 = /dev/cosa1c1 2nd board, 2nd channel
2037 117 block Enterprise Volume Management System (EVMS)
2039 The EVMS driver uses a layered, plug-in model to provide
2040 unparalleled flexibility and extensibility in managing
2041 storage. This allows for easy expansion or customization
2042 of various levels of volume management. Requested by
2043 Mark Peloquin (peloquin at us.ibm.com).
2045 Note: EVMS populates and manages all the devnodes in
2048 http://sf.net/projects/evms
2050 0 = /dev/evms/block_device EVMS block device
2051 1 = /dev/evms/legacyname1 First EVMS legacy device
2052 2 = /dev/evms/legacyname2 Second EVMS legacy device
2054 Both ranges can grow (down or up) until they meet.
2056 254 = /dev/evms/EVMSname2 Second EVMS native device
2057 255 = /dev/evms/EVMSname1 First EVMS native device
2059 Note: legacyname(s) are derived from the normal legacy
2060 device names. For example, /dev/hda5 would become
2063 118 char Solidum ???
2067 128 = /dev/solnpctl0
2068 129 = /dev/solnpctl1
2071 119 char VMware virtual network control
2072 0 = /dev/vnet0 1st virtual network
2073 1 = /dev/vnet1 2nd virtual network
2076 120-127 char LOCAL/EXPERIMENTAL USE
2077 120-127 block LOCAL/EXPERIMENTAL USE
2078 Allocated for local/experimental use. For devices not
2079 assigned official numbers, these ranges should be
2080 used in order to avoid conflicting with future assignments.
2082 128-135 char Unix98 PTY masters
2084 These devices should not have corresponding device
2085 nodes; instead they should be accessed through the
2086 /dev/ptmx cloning interface.
2089 128 block SCSI disk devices (128-143)
2090 0 = /dev/sddy 129th SCSI disk whole disk
2091 16 = /dev/sddz 130th SCSI disk whole disk
2092 32 = /dev/sdea 131th SCSI disk whole disk
2094 240 = /dev/sden 144th SCSI disk whole disk
2096 Partitions are handled in the same way as for IDE
2097 disks (see major number 3) except that the limit on
2101 129 block SCSI disk devices (144-159)
2102 0 = /dev/sdeo 145th SCSI disk whole disk
2103 16 = /dev/sdep 146th SCSI disk whole disk
2104 32 = /dev/sdeq 147th SCSI disk whole disk
2106 240 = /dev/sdfd 160th SCSI disk whole disk
2108 Partitions are handled in the same way as for IDE
2109 disks (see major number 3) except that the limit on
2113 130 block SCSI disk devices (160-175)
2114 0 = /dev/sdfe 161st SCSI disk whole disk
2115 16 = /dev/sdff 162nd SCSI disk whole disk
2116 32 = /dev/sdfg 163rd SCSI disk whole disk
2118 240 = /dev/sdft 176th SCSI disk whole disk
2120 Partitions are handled in the same way as for IDE
2121 disks (see major number 3) except that the limit on
2124 131 block SCSI disk devices (176-191)
2125 0 = /dev/sdfu 177th SCSI disk whole disk
2126 16 = /dev/sdfv 178th SCSI disk whole disk
2127 32 = /dev/sdfw 179th SCSI disk whole disk
2129 240 = /dev/sdgj 192nd SCSI disk whole disk
2131 Partitions are handled in the same way as for IDE
2132 disks (see major number 3) except that the limit on
2136 132 block SCSI disk devices (192-207)
2137 0 = /dev/sdgk 193rd SCSI disk whole disk
2138 16 = /dev/sdgl 194th SCSI disk whole disk
2139 32 = /dev/sdgm 195th SCSI disk whole disk
2141 240 = /dev/sdgz 208th SCSI disk whole disk
2143 Partitions are handled in the same way as for IDE
2144 disks (see major number 3) except that the limit on
2148 133 block SCSI disk devices (208-223)
2149 0 = /dev/sdha 209th SCSI disk whole disk
2150 16 = /dev/sdhb 210th SCSI disk whole disk
2151 32 = /dev/sdhc 211th SCSI disk whole disk
2153 240 = /dev/sdhp 224th SCSI disk whole disk
2155 Partitions are handled in the same way as for IDE
2156 disks (see major number 3) except that the limit on
2160 134 block SCSI disk devices (224-239)
2161 0 = /dev/sdhq 225th SCSI disk whole disk
2162 16 = /dev/sdhr 226th SCSI disk whole disk
2163 32 = /dev/sdhs 227th SCSI disk whole disk
2165 240 = /dev/sdif 240th SCSI disk whole disk
2167 Partitions are handled in the same way as for IDE
2168 disks (see major number 3) except that the limit on
2172 135 block SCSI disk devices (240-255)
2173 0 = /dev/sdig 241st SCSI disk whole disk
2174 16 = /dev/sdih 242nd SCSI disk whole disk
2175 32 = /dev/sdih 243rd SCSI disk whole disk
2177 240 = /dev/sdiv 256th SCSI disk whole disk
2179 Partitions are handled in the same way as for IDE
2180 disks (see major number 3) except that the limit on
2184 136-143 char Unix98 PTY slaves
2185 0 = /dev/pts/0 First Unix98 pseudo-TTY
2186 1 = /dev/pts/1 Second Unix98 pesudo-TTY
2189 These device nodes are automatically generated with
2190 the proper permissions and modes by mounting the
2191 devpts filesystem onto /dev/pts with the appropriate
2192 mount options (distribution dependent, however, on
2193 *most* distributions the appropriate options are
2194 "mode=0620,gid=<gid of the "tty" group>".)
2196 136 block Mylex DAC960 PCI RAID controller; ninth controller
2197 0 = /dev/rd/c8d0 First disk, whole disk
2198 8 = /dev/rd/c8d1 Second disk, whole disk
2200 248 = /dev/rd/c8d31 32nd disk, whole disk
2202 Partitions are handled as for major 48.
2204 137 block Mylex DAC960 PCI RAID controller; tenth controller
2205 0 = /dev/rd/c9d0 First disk, whole disk
2206 8 = /dev/rd/c9d1 Second disk, whole disk
2208 248 = /dev/rd/c9d31 32nd disk, whole disk
2210 Partitions are handled as for major 48.
2212 138 block Mylex DAC960 PCI RAID controller; eleventh controller
2213 0 = /dev/rd/c10d0 First disk, whole disk
2214 8 = /dev/rd/c10d1 Second disk, whole disk
2216 248 = /dev/rd/c10d31 32nd disk, whole disk
2218 Partitions are handled as for major 48.
2220 139 block Mylex DAC960 PCI RAID controller; twelfth controller
2221 0 = /dev/rd/c11d0 First disk, whole disk
2222 8 = /dev/rd/c11d1 Second disk, whole disk
2224 248 = /dev/rd/c11d31 32nd disk, whole disk
2226 Partitions are handled as for major 48.
2228 140 block Mylex DAC960 PCI RAID controller; thirteenth controller
2229 0 = /dev/rd/c12d0 First disk, whole disk
2230 8 = /dev/rd/c12d1 Second disk, whole disk
2232 248 = /dev/rd/c12d31 32nd disk, whole disk
2234 Partitions are handled as for major 48.
2236 141 block Mylex DAC960 PCI RAID controller; fourteenth controller
2237 0 = /dev/rd/c13d0 First disk, whole disk
2238 8 = /dev/rd/c13d1 Second disk, whole disk
2240 248 = /dev/rd/c13d31 32nd disk, whole disk
2242 Partitions are handled as for major 48.
2244 142 block Mylex DAC960 PCI RAID controller; fifteenth controller
2245 0 = /dev/rd/c14d0 First disk, whole disk
2246 8 = /dev/rd/c14d1 Second disk, whole disk
2248 248 = /dev/rd/c14d31 32nd disk, whole disk
2250 Partitions are handled as for major 48.
2252 143 block Mylex DAC960 PCI RAID controller; sixteenth controller
2253 0 = /dev/rd/c15d0 First disk, whole disk
2254 8 = /dev/rd/c15d1 Second disk, whole disk
2256 248 = /dev/rd/c15d31 32nd disk, whole disk
2258 Partitions are handled as for major 48.
2260 144 char Encapsulated PPP
2261 0 = /dev/pppox0 First PPP over Ethernet
2263 63 = /dev/pppox63 64th PPP over Ethernet
2265 This is primarily used for ADSL.
2267 The SST 5136-DN DeviceNet interface driver has been
2268 relocated to major 183 due to an unfortunate conflict.
2270 144 block Expansion Area #1 for more non-device (e.g. NFS) mounts
2271 0 = mounted device 256
2272 255 = mounted device 511
2274 145 char SAM9407-based soundcard
2276 1 = /dev/sam0_sequencer
2277 2 = /dev/sam0_midi00
2280 6 = /dev/sam0_sndstat
2281 18 = /dev/sam0_midi01
2282 34 = /dev/sam0_midi02
2283 50 = /dev/sam0_midi03
2284 64 = /dev/sam1_mixer
2286 128 = /dev/sam2_mixer
2288 192 = /dev/sam3_mixer
2291 Device functions match OSS, but offer a number of
2292 addons, which are sam9407 specific. OSS can be
2293 operated simultaneously, taking care of the codec.
2295 145 block Expansion Area #2 for more non-device (e.g. NFS) mounts
2296 0 = mounted device 512
2297 255 = mounted device 767
2299 146 char SYSTRAM SCRAMNet mirrored-memory network
2300 0 = /dev/scramnet0 First SCRAMNet device
2301 1 = /dev/scramnet1 Second SCRAMNet device
2304 146 block Expansion Area #3 for more non-device (e.g. NFS) mounts
2305 0 = mounted device 768
2306 255 = mounted device 1023
2308 147 char Aureal Semiconductor Vortex Audio device
2309 0 = /dev/aureal0 First Aureal Vortex
2310 1 = /dev/aureal1 Second Aureal Vortex
2313 148 char Technology Concepts serial card
2314 0 = /dev/ttyT0 First TCL port
2315 1 = /dev/ttyT1 Second TCL port
2318 149 char Technology Concepts serial card - alternate devices
2319 0 = /dev/cut0 Callout device for ttyT0
2320 1 = /dev/cut0 Callout device for ttyT1
2323 150 char Real-Time Linux FIFOs
2324 0 = /dev/rtf0 First RTLinux FIFO
2325 1 = /dev/rtf1 Second RTLinux FIFO
2328 151 char DPT I2O SmartRaid V controller
2329 0 = /dev/dpti0 First DPT I2O adapter
2330 1 = /dev/dpti1 Second DPT I2O adapter
2333 152 char EtherDrive Control Device
2334 0 = /dev/etherd/ctl Connect/Disconnect an EtherDrive
2335 1 = /dev/etherd/err Monitor errors
2336 2 = /dev/etherd/raw Raw AoE packet monitor
2338 152 block EtherDrive Block Devices
2339 0 = /dev/etherd/0 EtherDrive 0
2341 255 = /dev/etherd/255 EtherDrive 255
2343 153 char SPI Bus Interface (sometimes referred to as MicroWire)
2344 0 = /dev/spi0 First SPI device on the bus
2345 1 = /dev/spi1 Second SPI device on the bus
2347 15 = /dev/spi15 Sixteenth SPI device on the bus
2349 154 char Specialix RIO serial card
2350 0 = /dev/ttySR0 First RIO port
2352 255 = /dev/ttySR255 256th RIO port
2354 155 char Specialix RIO serial card - alternate devices
2355 0 = /dev/cusr0 Callout device for ttySR0
2357 255 = /dev/cusr255 Callout device for ttySR255
2359 156 char Specialix RIO serial card
2360 0 = /dev/ttySR256 257th RIO port
2362 255 = /dev/ttySR511 512th RIO port
2364 157 char Specialix RIO serial card - alternate devices
2365 0 = /dev/cusr256 Callout device for ttySR256
2367 255 = /dev/cusr511 Callout device for ttySR511
2369 158 char Dialogic GammaLink fax driver
2370 0 = /dev/gfax0 GammaLink channel 0
2371 1 = /dev/gfax1 GammaLink channel 1
2376 160 char General Purpose Instrument Bus (GPIB)
2377 0 = /dev/gpib0 First GPIB bus
2378 1 = /dev/gpib1 Second GPIB bus
2381 160 block Promise SX8 8-port SATA Disks on First Controller
2382 0 = /dev/sx8/0 SATA disk 0 whole disk
2383 1 = /dev/sx8/0p1 SATA disk 0 partition 1
2385 31 = /dev/sx8/0p31 SATA disk 0 partition 31
2387 32 = /dev/sx8/1 SATA disk 1 whole disk
2388 64 = /dev/sx8/2 SATA disk 2 whole disk
2390 224 = /dev/sx8/7 SATA disk 7 whole disk
2392 Partitions are handled in the same way as for IDE
2393 disks (see major number 3) except that the limit on
2396 161 char IrCOMM devices (IrDA serial/parallel emulation)
2397 0 = /dev/ircomm0 First IrCOMM device
2398 1 = /dev/ircomm1 Second IrCOMM device
2400 16 = /dev/irlpt0 First IrLPT device
2401 17 = /dev/irlpt1 Second IrLPT device
2404 161 block Promise SX8 8-port SATA Disks on Second Controller
2405 0 = /dev/sx8/8 SATA disk 8 whole disk
2406 1 = /dev/sx8/8p1 SATA disk 8 partition 1
2408 31 = /dev/sx8/8p31 SATA disk 8 partition 31
2410 32 = /dev/sx8/9 SATA disk 9 whole disk
2411 64 = /dev/sx8/10 SATA disk 10 whole disk
2413 224 = /dev/sx8/15 SATA disk 15 whole disk
2415 Partitions are handled in the same way as for IDE
2416 disks (see major number 3) except that the limit on
2419 162 char Raw block device interface
2420 0 = /dev/rawctl Raw I/O control device
2421 1 = /dev/raw/raw1 First raw I/O device
2422 2 = /dev/raw/raw2 Second raw I/O device
2425 163 char UNASSIGNED (was Radio Tech BIM-XXX-RS232 radio modem - see 51)
2427 164 char Chase Research AT/PCI-Fast serial card
2428 0 = /dev/ttyCH0 AT/PCI-Fast board 0, port 0
2430 15 = /dev/ttyCH15 AT/PCI-Fast board 0, port 15
2431 16 = /dev/ttyCH16 AT/PCI-Fast board 1, port 0
2433 31 = /dev/ttyCH31 AT/PCI-Fast board 1, port 15
2434 32 = /dev/ttyCH32 AT/PCI-Fast board 2, port 0
2436 47 = /dev/ttyCH47 AT/PCI-Fast board 2, port 15
2437 48 = /dev/ttyCH48 AT/PCI-Fast board 3, port 0
2439 63 = /dev/ttyCH63 AT/PCI-Fast board 3, port 15
2441 165 char Chase Research AT/PCI-Fast serial card - alternate devices
2442 0 = /dev/cuch0 Callout device for ttyCH0
2444 63 = /dev/cuch63 Callout device for ttyCH63
2446 166 char ACM USB modems
2447 0 = /dev/ttyACM0 First ACM modem
2448 1 = /dev/ttyACM1 Second ACM modem
2451 167 char ACM USB modems - alternate devices
2452 0 = /dev/cuacm0 Callout device for ttyACM0
2453 1 = /dev/cuacm1 Callout device for ttyACM1
2456 168 char Eracom CSA7000 PCI encryption adaptor
2457 0 = /dev/ecsa0 First CSA7000
2458 1 = /dev/ecsa1 Second CSA7000
2461 169 char Eracom CSA8000 PCI encryption adaptor
2462 0 = /dev/ecsa8-0 First CSA8000
2463 1 = /dev/ecsa8-1 Second CSA8000
2466 170 char AMI MegaRAC remote access controller
2467 0 = /dev/megarac0 First MegaRAC card
2468 1 = /dev/megarac1 Second MegaRAC card
2471 171 char Reserved for IEEE 1394 (Firewire)
2474 172 char Moxa Intellio serial card
2475 0 = /dev/ttyMX0 First Moxa port
2476 1 = /dev/ttyMX1 Second Moxa port
2478 127 = /dev/ttyMX127 128th Moxa port
2479 128 = /dev/moxactl Moxa control port
2481 173 char Moxa Intellio serial card - alternate devices
2482 0 = /dev/cumx0 Callout device for ttyMX0
2483 1 = /dev/cumx1 Callout device for ttyMX1
2485 127 = /dev/cumx127 Callout device for ttyMX127
2487 174 char SmartIO serial card
2488 0 = /dev/ttySI0 First SmartIO port
2489 1 = /dev/ttySI1 Second SmartIO port
2492 175 char SmartIO serial card - alternate devices
2493 0 = /dev/cusi0 Callout device for ttySI0
2494 1 = /dev/cusi1 Callout device for ttySI1
2497 176 char nCipher nFast PCI crypto accelerator
2498 0 = /dev/nfastpci0 First nFast PCI device
2499 1 = /dev/nfastpci1 First nFast PCI device
2502 177 char TI PCILynx memory spaces
2503 0 = /dev/pcilynx/aux0 AUX space of first PCILynx card
2505 15 = /dev/pcilynx/aux15 AUX space of 16th PCILynx card
2506 16 = /dev/pcilynx/rom0 ROM space of first PCILynx card
2508 31 = /dev/pcilynx/rom15 ROM space of 16th PCILynx card
2509 32 = /dev/pcilynx/ram0 RAM space of first PCILynx card
2511 47 = /dev/pcilynx/ram15 RAM space of 16th PCILynx card
2513 178 char Giganet cLAN1xxx virtual interface adapter
2514 0 = /dev/clanvi0 First cLAN adapter
2515 1 = /dev/clanvi1 Second cLAN adapter
2518 179 char CCube DVXChip-based PCI products
2519 0 = /dev/dvxirq0 First DVX device
2520 1 = /dev/dvxirq1 Second DVX device
2523 180 char USB devices
2524 0 = /dev/usb/lp0 First USB printer
2526 15 = /dev/usb/lp15 16th USB printer
2527 16 = /dev/usb/mouse0 First USB mouse
2529 31 = /dev/usb/mouse15 16th USB mouse
2530 32 = /dev/usb/ez0 First USB firmware loader
2532 47 = /dev/usb/ez15 16th USB firmware loader
2533 48 = /dev/usb/scanner0 First USB scanner
2535 63 = /dev/usb/scanner15 16th USB scanner
2536 64 = /dev/usb/rio500 Diamond Rio 500
2537 65 = /dev/usb/usblcd USBLCD Interface (info@usblcd.de)
2538 66 = /dev/usb/cpad0 Synaptics cPad (mouse/LCD)
2541 181 char Conrad Electronic parallel port radio clocks
2542 0 = /dev/pcfclock0 First Conrad radio clock
2543 1 = /dev/pcfclock1 Second Conrad radio clock
2546 182 char Picture Elements THR2 binarizer
2547 0 = /dev/pethr0 First THR2 board
2548 1 = /dev/pethr1 Second THR2 board
2551 183 char SST 5136-DN DeviceNet interface
2552 0 = /dev/ss5136dn0 First DeviceNet interface
2553 1 = /dev/ss5136dn1 Second DeviceNet interface
2556 This device used to be assigned to major number 144.
2557 It had to be moved due to an unfortunate conflict.
2559 184 char Picture Elements' video simulator/sender
2560 0 = /dev/pevss0 First sender board
2561 1 = /dev/pevss1 Second sender board
2564 185 char InterMezzo high availability file system
2565 0 = /dev/intermezzo0 First cache manager
2566 1 = /dev/intermezzo1 Second cache manager
2569 See http://www.inter-mezzo.org/ for more information.
2571 186 char Object-based storage control device
2572 0 = /dev/obd0 First obd control device
2573 1 = /dev/obd1 Second obd control device
2576 See ftp://ftp.lustre.org/pub/obd for code and information.
2578 187 char DESkey hardware encryption device
2579 0 = /dev/deskey0 First DES key
2580 1 = /dev/deskey1 Second DES key
2583 188 char USB serial converters
2584 0 = /dev/ttyUSB0 First USB serial converter
2585 1 = /dev/ttyUSB1 Second USB serial converter
2588 189 char USB serial converters - alternate devices
2589 0 = /dev/cuusb0 Callout device for ttyUSB0
2590 1 = /dev/cuusb1 Callout device for ttyUSB1
2593 190 char Kansas City tracker/tuner card
2594 0 = /dev/kctt0 First KCT/T card
2595 1 = /dev/kctt1 Second KCT/T card
2598 191 char Reserved for PCMCIA
2600 192 char Kernel profiling interface
2601 0 = /dev/profile Profiling control device
2602 1 = /dev/profile0 Profiling device for CPU 0
2603 2 = /dev/profile1 Profiling device for CPU 1
2606 193 char Kernel event-tracing interface
2607 0 = /dev/trace Tracing control device
2608 1 = /dev/trace0 Tracing device for CPU 0
2609 2 = /dev/trace1 Tracing device for CPU 1
2612 194 char linVideoStreams (LINVS)
2613 0 = /dev/mvideo/status0 Video compression status
2614 1 = /dev/mvideo/stream0 Video stream
2615 2 = /dev/mvideo/frame0 Single compressed frame
2616 3 = /dev/mvideo/rawframe0 Raw uncompressed frame
2617 4 = /dev/mvideo/codec0 Direct codec access
2618 5 = /dev/mvideo/video4linux0 Video4Linux compatibility
2620 16 = /dev/mvideo/status1 Second device
2622 32 = /dev/mvideo/status2 Third device
2625 240 = /dev/mvideo/status15 16th device
2628 195 char Nvidia graphics devices
2629 0 = /dev/nvidia0 First Nvidia card
2630 1 = /dev/nvidia1 Second Nvidia card
2632 255 = /dev/nvidiactl Nvidia card control device
2634 196 char Tormenta T1 card
2635 0 = /dev/tor/0 Master control channel for all cards
2636 1 = /dev/tor/1 First DS0
2637 2 = /dev/tor/2 Second DS0
2639 48 = /dev/tor/48 48th DS0
2640 49 = /dev/tor/49 First pseudo-channel
2641 50 = /dev/tor/50 Second pseudo-channel
2644 197 char OpenTNF tracing facility
2645 0 = /dev/tnf/t0 Trace 0 data extraction
2646 1 = /dev/tnf/t1 Trace 1 data extraction
2648 128 = /dev/tnf/status Tracing facility status
2649 130 = /dev/tnf/trace Tracing device
2651 198 char Total Impact TPMP2 quad coprocessor PCI card
2652 0 = /dev/tpmp2/0 First card
2653 1 = /dev/tpmp2/1 Second card
2656 199 char Veritas volume manager (VxVM) volumes
2657 0 = /dev/vx/rdsk/*/* First volume
2658 1 = /dev/vx/rdsk/*/* Second volume
2661 199 block Veritas volume manager (VxVM) volumes
2662 0 = /dev/vx/dsk/*/* First volume
2663 1 = /dev/vx/dsk/*/* Second volume
2666 The namespace in these directories is maintained by
2667 the user space VxVM software.
2669 200 char Veritas VxVM configuration interface
2670 0 = /dev/vx/config Configuration access node
2671 1 = /dev/vx/trace Volume i/o trace access node
2672 2 = /dev/vx/iod Volume i/o daemon access node
2673 3 = /dev/vx/info Volume information access node
2674 4 = /dev/vx/task Volume tasks access node
2675 5 = /dev/vx/taskmon Volume tasks monitor daemon
2677 201 char Veritas VxVM dynamic multipathing driver
2678 0 = /dev/vx/rdmp/* First multipath device
2679 1 = /dev/vx/rdmp/* Second multipath device
2681 201 block Veritas VxVM dynamic multipathing driver
2682 0 = /dev/vx/dmp/* First multipath device
2683 1 = /dev/vx/dmp/* Second multipath device
2686 The namespace in these directories is maintained by
2687 the user space VxVM software.
2689 202 char CPU model-specific registers
2690 0 = /dev/cpu/0/msr MSRs on CPU 0
2691 1 = /dev/cpu/1/msr MSRs on CPU 1
2694 203 char CPU CPUID information
2695 0 = /dev/cpu/0/cpuid CPUID on CPU 0
2696 1 = /dev/cpu/1/cpuid CPUID on CPU 1
2699 204 char Low-density serial ports
2700 0 = /dev/ttyLU0 LinkUp Systems L72xx UART - port 0
2701 1 = /dev/ttyLU1 LinkUp Systems L72xx UART - port 1
2702 2 = /dev/ttyLU2 LinkUp Systems L72xx UART - port 2
2703 3 = /dev/ttyLU3 LinkUp Systems L72xx UART - port 3
2704 4 = /dev/ttyFB0 Intel Footbridge (ARM)
2705 5 = /dev/ttySA0 StrongARM builtin serial port 0
2706 6 = /dev/ttySA1 StrongARM builtin serial port 1
2707 7 = /dev/ttySA2 StrongARM builtin serial port 2
2708 8 = /dev/ttySC0 SCI serial port (SuperH) - port 0
2709 9 = /dev/ttySC1 SCI serial port (SuperH) - port 1
2710 10 = /dev/ttySC2 SCI serial port (SuperH) - port 2
2711 11 = /dev/ttySC3 SCI serial port (SuperH) - port 3
2712 12 = /dev/ttyFW0 Firmware console - port 0
2713 13 = /dev/ttyFW1 Firmware console - port 1
2714 14 = /dev/ttyFW2 Firmware console - port 2
2715 15 = /dev/ttyFW3 Firmware console - port 3
2716 16 = /dev/ttyAM0 ARM "AMBA" serial port 0
2718 31 = /dev/ttyAM15 ARM "AMBA" serial port 15
2719 32 = /dev/ttyDB0 DataBooster serial port 0
2721 39 = /dev/ttyDB7 DataBooster serial port 7
2722 40 = /dev/ttySG0 SGI Altix console port
2724 205 char Low-density serial ports (alternate device)
2725 0 = /dev/culu0 Callout device for ttyLU0
2726 1 = /dev/culu1 Callout device for ttyLU1
2727 2 = /dev/culu2 Callout device for ttyLU2
2728 3 = /dev/culu3 Callout device for ttyLU3
2729 4 = /dev/cufb0 Callout device for ttyFB0
2730 5 = /dev/cusa0 Callout device for ttySA0
2731 6 = /dev/cusa1 Callout device for ttySA1
2732 7 = /dev/cusa2 Callout device for ttySA2
2733 8 = /dev/cusc0 Callout device for ttySC0
2734 9 = /dev/cusc1 Callout device for ttySC1
2735 10 = /dev/cusc2 Callout device for ttySC2
2736 11 = /dev/cusc3 Callout device for ttySC3
2737 12 = /dev/cufw0 Callout device for ttyFW0
2738 13 = /dev/cufw1 Callout device for ttyFW1
2739 14 = /dev/cufw2 Callout device for ttyFW2
2740 15 = /dev/cufw3 Callout device for ttyFW3
2741 16 = /dev/cuam0 Callout device for ttyAM0
2743 31 = /dev/cuam15 Callout device for ttyAM15
2744 32 = /dev/cudb0 Callout device for ttyDB0
2746 39 = /dev/cudb7 Callout device for ttyDB7
2747 40 = /dev/cusg0 Callout device for ttySG0
2749 206 char OnStream SC-x0 tape devices
2750 0 = /dev/osst0 First OnStream SCSI tape, mode 0
2751 1 = /dev/osst1 Second OnStream SCSI tape, mode 0
2753 32 = /dev/osst0l First OnStream SCSI tape, mode 1
2754 33 = /dev/osst1l Second OnStream SCSI tape, mode 1
2756 64 = /dev/osst0m First OnStream SCSI tape, mode 2
2757 65 = /dev/osst1m Second OnStream SCSI tape, mode 2
2759 96 = /dev/osst0a First OnStream SCSI tape, mode 3
2760 97 = /dev/osst1a Second OnStream SCSI tape, mode 3
2762 128 = /dev/nosst0 No rewind version of /dev/osst0
2763 129 = /dev/nosst1 No rewind version of /dev/osst1
2765 160 = /dev/nosst0l No rewind version of /dev/osst0l
2766 161 = /dev/nosst1l No rewind version of /dev/osst1l
2768 192 = /dev/nosst0m No rewind version of /dev/osst0m
2769 193 = /dev/nosst1m No rewind version of /dev/osst1m
2771 224 = /dev/nosst0a No rewind version of /dev/osst0a
2772 225 = /dev/nosst1a No rewind version of /dev/osst1a
2775 The OnStream SC-x0 SCSI tapes do not support the
2776 standard SCSI SASD command set and therefore need
2777 their own driver "osst". Note that the IDE, USB (and
2778 maybe ParPort) versions may be driven via ide-scsi or
2779 usb-storage SCSI emulation and this osst device and
2780 driver as well. The ADR-x0 drives are QIC-157
2781 compliant and don't need osst.
2783 207 char Compaq ProLiant health feature indicate
2784 0 = /dev/cpqhealth/cpqw Redirector interface
2785 1 = /dev/cpqhealth/crom EISA CROM
2786 2 = /dev/cpqhealth/cdt Data Table
2787 3 = /dev/cpqhealth/cevt Event Log
2788 4 = /dev/cpqhealth/casr Automatic Server Recovery
2789 5 = /dev/cpqhealth/cecc ECC Memory
2790 6 = /dev/cpqhealth/cmca Machine Check Architecture
2791 7 = /dev/cpqhealth/ccsm Deprecated CDT
2792 8 = /dev/cpqhealth/cnmi NMI Handling
2793 9 = /dev/cpqhealth/css Sideshow Management
2794 10 = /dev/cpqhealth/cram CMOS interface
2795 11 = /dev/cpqhealth/cpci PCI IRQ interface
2797 208 char User space serial ports
2798 0 = /dev/ttyU0 First user space serial port
2799 1 = /dev/ttyU1 Second user space serial port
2802 209 char User space serial ports (alternate devices)
2803 0 = /dev/cuu0 Callout device for ttyU0
2804 1 = /dev/cuu1 Callout device for ttyU1
2807 210 char SBE, Inc. sync/async serial card
2808 0 = /dev/sbei/wxcfg0 Configuration device for board 0
2809 1 = /dev/sbei/dld0 Download device for board 0
2810 2 = /dev/sbei/wan00 WAN device, port 0, board 0
2811 3 = /dev/sbei/wan01 WAN device, port 1, board 0
2812 4 = /dev/sbei/wan02 WAN device, port 2, board 0
2813 5 = /dev/sbei/wan03 WAN device, port 3, board 0
2814 6 = /dev/sbei/wanc00 WAN clone device, port 0, board 0
2815 7 = /dev/sbei/wanc01 WAN clone device, port 1, board 0
2816 8 = /dev/sbei/wanc02 WAN clone device, port 2, board 0
2817 9 = /dev/sbei/wanc03 WAN clone device, port 3, board 0
2818 10 = /dev/sbei/wxcfg1 Configuration device for board 1
2819 11 = /dev/sbei/dld1 Download device for board 1
2820 12 = /dev/sbei/wan10 WAN device, port 0, board 1
2821 13 = /dev/sbei/wan11 WAN device, port 1, board 1
2822 14 = /dev/sbei/wan12 WAN device, port 2, board 1
2823 15 = /dev/sbei/wan13 WAN device, port 3, board 1
2824 16 = /dev/sbei/wanc10 WAN clone device, port 0, board 1
2825 17 = /dev/sbei/wanc11 WAN clone device, port 1, board 1
2826 18 = /dev/sbei/wanc12 WAN clone device, port 2, board 1
2827 19 = /dev/sbei/wanc13 WAN clone device, port 3, board 1
2830 Yes, each board is really spaced 10 (decimal) apart.
2832 211 char Addinum CPCI1500 digital I/O card
2833 0 = /dev/addinum/cpci1500/0 First CPCI1500 card
2834 1 = /dev/addinum/cpci1500/1 Second CPCI1500 card
2837 212 char LinuxTV.org DVB driver subsystem
2839 0 = /dev/dvb/adapter0/video0 first video decoder of first card
2840 1 = /dev/dvb/adapter0/audio0 first audio decoder of first card
2841 2 = /dev/dvb/adapter0/sec0 (obsolete/unused)
2842 3 = /dev/dvb/adapter0/frontend0 first frontend device of first card
2843 4 = /dev/dvb/adapter0/demux0 first demux device of first card
2844 5 = /dev/dvb/adapter0/dvr0 first digital video recoder device of first card
2845 6 = /dev/dvb/adapter0/ca0 first common access port of first card
2846 7 = /dev/dvb/adapter0/net0 first network device of first card
2847 8 = /dev/dvb/adapter0/osd0 first on-screen-display device of first card
2848 9 = /dev/dvb/adapter0/video1 second video decoder of first card
2850 64 = /dev/dvb/adapter1/video0 first video decoder of second card
2852 128 = /dev/dvb/adapter2/video0 first video decoder of third card
2854 196 = /dev/dvb/adapter3/video0 first video decoder of fourth card
2857 216 char USB BlueTooth devices
2858 0 = /dev/ttyUB0 First USB BlueTooth device
2859 1 = /dev/ttyUB1 Second USB BlueTooth device
2862 217 char USB BlueTooth devices (alternate devices)
2863 0 = /dev/cuub0 Callout device for ttyUB0
2864 1 = /dev/cuub1 Callout device for ttyUB1
2867 218 char The Logical Company bus Unibus/Qbus adapters
2868 0 = /dev/logicalco/bci/0 First bus adapter
2869 1 = /dev/logicalco/bci/1 First bus adapter
2872 219 char The Logical Company DCI-1300 digital I/O card
2873 0 = /dev/logicalco/dci1300/0 First DCI-1300 card
2874 1 = /dev/logicalco/dci1300/1 Second DCI-1300 card
2877 220 char Myricom Myrinet "GM" board
2878 0 = /dev/myricom/gm0 First Myrinet GM board
2879 1 = /dev/myricom/gmp0 First board "root access"
2880 2 = /dev/myricom/gm1 Second Myrinet GM board
2881 3 = /dev/myricom/gmp1 Second board "root access"
2885 0 = /dev/bus/vme/m0 First master image
2886 1 = /dev/bus/vme/m1 Second master image
2887 2 = /dev/bus/vme/m2 Third master image
2888 3 = /dev/bus/vme/m3 Fourth master image
2889 4 = /dev/bus/vme/s0 First slave image
2890 5 = /dev/bus/vme/s1 Second slave image
2891 6 = /dev/bus/vme/s2 Third slave image
2892 7 = /dev/bus/vme/s3 Fourth slave image
2893 8 = /dev/bus/vme/ctl Control
2895 It is expected that all VME bus drivers will use the
2896 same interface. For interface documentation see
2897 http://www.vmelinux.org/.
2899 224 char A2232 serial card
2900 0 = /dev/ttyY0 First A2232 port
2901 1 = /dev/ttyY1 Second A2232 port
2904 225 char A2232 serial card (alternate devices)
2905 0 = /dev/cuy0 Callout device for ttyY0
2906 1 = /dev/cuy1 Callout device for ttyY1
2909 226 char Direct Rendering Infrastructure (DRI)
2910 0 = /dev/dri/card0 First graphics card
2911 1 = /dev/dri/card1 Second graphics card
2914 227 char IBM 3270 terminal Unix tty access
2915 1 = /dev/3270/tty1 First 3270 terminal
2916 2 = /dev/3270/tty2 Seconds 3270 terminal
2919 228 char IBM 3270 terminal block-mode access
2920 0 = /dev/3270/tub Controlling interface
2921 1 = /dev/3270/tub1 First 3270 terminal
2922 2 = /dev/3270/tub2 Second 3270 terminal
2925 229 char IBM iSeries virtual console
2926 0 = /dev/iseries/vtty0 First console port
2927 1 = /dev/iseries/vtty1 Second console port
2930 230 char IBM iSeries virtual tape
2931 0 = /dev/iseries/vt0 First virtual tape, mode 0
2932 1 = /dev/iseries/vt1 Second virtual tape, mode 0
2934 32 = /dev/iseries/vt0l First virtual tape, mode 1
2935 33 = /dev/iseries/vt1l Second virtual tape, mode 1
2937 64 = /dev/iseries/vt0m First virtual tape, mode 2
2938 65 = /dev/iseries/vt1m Second virtual tape, mode 2
2940 96 = /dev/iseries/vt0a First virtual tape, mode 3
2941 97 = /dev/iseries/vt1a Second virtual tape, mode 3
2943 128 = /dev/iseries/nvt0 First virtual tape, mode 0, no rewind
2944 129 = /dev/iseries/nvt1 Second virtual tape, mode 0, no rewind
2946 160 = /dev/iseries/nvt0l First virtual tape, mode 1, no rewind
2947 161 = /dev/iseries/nvt1l Second virtual tape, mode 1, no rewind
2949 192 = /dev/iseries/nvt0m First virtual tape, mode 2, no rewind
2950 193 = /dev/iseries/nvt1m Second virtual tape, mode 2, no rewind
2952 224 = /dev/iseries/nvt0a First virtual tape, mode 3, no rewind
2953 225 = /dev/iseries/nvt1a Second virtual tape, mode 3, no rewind
2956 "No rewind" refers to the omission of the default
2957 automatic rewind on device close. The MTREW or MTOFFL
2958 ioctl()'s can be used to rewind the tape regardless of
2959 the device used to access it.
2963 240-254 char LOCAL/EXPERIMENTAL USE
2964 240-254 block LOCAL/EXPERIMENTAL USE
2965 Allocated for local/experimental use. For devices not
2966 assigned official numbers, these ranges should be
2967 used in order to avoid conflicting with future assignments.
2972 This major is reserved to assist the expansion to a
2973 larger number space. No device nodes with this major
2974 should ever be created on the filesystem.
2976 **** ADDITIONAL /dev DIRECTORY ENTRIES
2978 This section details additional entries that should or may exist in
2979 the /dev directory. It is preferred that symbolic links use the same
2980 form (absolute or relative) as is indicated here. Links are
2981 classified as "hard" or "symbolic" depending on the preferred type of
2982 link; if possible, the indicated type of link should be used.
2987 These links should exist on all systems:
2989 /dev/fd /proc/self/fd symbolic File descriptors
2990 /dev/stdin fd/0 symbolic stdin file descriptor
2991 /dev/stdout fd/1 symbolic stdout file descriptor
2992 /dev/stderr fd/2 symbolic stderr file descriptor
2993 /dev/nfsd socksys symbolic Required by iBCS-2
2994 /dev/X0R null symbolic Required by iBCS-2
2996 Note: /dev/X0R is <letter X>-<digit 0>-<letter R>.
3000 It is recommended that these links exist on all systems:
3002 /dev/core /proc/kcore symbolic Backward compatibility
3003 /dev/ramdisk ram0 symbolic Backward compatibility
3004 /dev/ftape qft0 symbolic Backward compatibility
3005 /dev/bttv0 video0 symbolic Backward compatibility
3006 /dev/radio radio0 symbolic Backward compatibility
3007 /dev/i2o* /dev/i2o/* symbolic Backward compatibility
3008 /dev/scd? sr? hard Alternate SCSI CD-ROM name
3010 Locally defined links
3012 The following links may be established locally to conform to the
3013 configuration of the system. This is merely a tabulation of existing
3014 practice, and does not constitute a recommendation. However, if they
3015 exist, they should have the following uses.
3017 /dev/mouse mouse port symbolic Current mouse device
3018 /dev/tape tape device symbolic Current tape device
3019 /dev/cdrom CD-ROM device symbolic Current CD-ROM device
3020 /dev/cdwriter CD-writer symbolic Current CD-writer device
3021 /dev/scanner scanner symbolic Current scanner device
3022 /dev/modem modem port symbolic Current dialout device
3023 /dev/root root device symbolic Current root filesystem
3024 /dev/swap swap device symbolic Current swap device
3026 /dev/modem should not be used for a modem which supports dialin as
3027 well as dialout, as it tends to cause lock file problems. If it
3028 exists, /dev/modem should point to the appropriate primary TTY device
3029 (the use of the alternate callout devices is deprecated).
3031 For SCSI devices, /dev/tape and /dev/cdrom should point to the
3032 ``cooked'' devices (/dev/st* and /dev/sr*, respectively), whereas
3033 /dev/cdwriter and /dev/scanner should point to the appropriate generic
3034 SCSI devices (/dev/sg*).
3036 /dev/mouse may point to a primary serial TTY device, a hardware mouse
3037 device, or a socket for a mouse driver program (e.g. /dev/gpmdata).
3041 Non-transient sockets and named pipes may exist in /dev. Common entries are:
3043 /dev/printer socket lpd local socket
3044 /dev/log socket syslog local socket
3045 /dev/gpmdata socket gpm mouse multiplexer
3049 The following names are reserved for mounting special filesystems
3050 under /dev. These special filesystems provide kernel interfaces that
3051 cannot be provided with standard device nodes.
3053 /dev/pts devpts PTY slave filesystem
3054 /dev/shm tmpfs POSIX shared memory maintenance access
3056 **** TERMINAL DEVICES
3058 Terminal, or TTY devices are a special class of character devices. A
3059 terminal device is any device that could act as a controlling terminal
3060 for a session; this includes virtual consoles, serial ports, and
3061 pseudoterminals (PTYs).
3063 All terminal devices share a common set of capabilities known as line
3064 diciplines; these include the common terminal line dicipline as well
3065 as SLIP and PPP modes.
3067 All terminal devices are named similarly; this section explains the
3068 naming and use of the various types of TTYs. Note that the naming
3069 conventions include several historical warts; some of these are
3070 Linux-specific, some were inherited from other systems, and some
3071 reflect Linux outgrowing a borrowed convention.
3073 A hash mark (#) in a device name is used here to indicate a decimal
3074 number without leading zeroes.
3076 Virtual consoles and the console device
3078 Virtual consoles are full-screen terminal displays on the system video
3079 monitor. Virtual consoles are named /dev/tty#, with numbering
3080 starting at /dev/tty1; /dev/tty0 is the current virtual console.
3081 /dev/tty0 is the device that should be used to access the system video
3082 card on those architectures for which the frame buffer devices
3083 (/dev/fb*) are not applicable. Do not use /dev/console
3086 The console device, /dev/console, is the device to which system
3087 messages should be sent, and on which logins should be permitted in
3088 single-user mode. Starting with Linux 2.1.71, /dev/console is managed
3089 by the kernel; for previous versions it should be a symbolic link to
3090 either /dev/tty0, a specific virtual console such as /dev/tty1, or to
3091 a serial port primary (tty*, not cu*) device, depending on the
3092 configuration of the system.
3096 Serial ports are RS-232 serial ports and any device which simulates
3097 one, either in hardware (such as internal modems) or in software (such
3098 as the ISDN driver.) Under Linux, each serial ports has two device
3099 names, the primary or callin device and the alternate or callout one.
3100 Each kind of device is indicated by a different letter. For any
3101 letter X, the names of the devices are /dev/ttyX# and /dev/cux#,
3102 respectively; for historical reasons, /dev/ttyS# and /dev/ttyC#
3103 correspond to /dev/cua# and /dev/cub#. In the future, it should be
3104 expected that multiple letters will be used; all letters will be upper
3105 case for the "tty" device (e.g. /dev/ttyDP#) and lower case for the
3106 "cu" device (e.g. /dev/cudp#).
3108 The names /dev/ttyQ# and /dev/cuq# are reserved for local use.
3110 The alternate devices provide for kernel-based exclusion and somewhat
3111 different defaults than the primary devices. Their main purpose is to
3112 allow the use of serial ports with programs with no inherent or broken
3113 support for serial ports. Their use is deprecated, and they may be
3114 removed from a future version of Linux.
3116 Arbitration of serial ports is provided by the use of lock files with
3117 the names /var/lock/LCK..ttyX#. The contents of the lock file should
3118 be the PID of the locking process as an ASCII number.
3120 It is common practice to install links such as /dev/modem
3121 which point to serial ports. In order to ensure proper locking in the
3122 presence of these links, it is recommended that software chase
3123 symlinks and lock all possible names; additionally, it is recommended
3124 that a lock file be installed with the corresponding alternate
3125 device. In order to avoid deadlocks, it is recommended that the locks
3126 are acquired in the following order, and released in the reverse:
3128 1. The symbolic link name, if any (/var/lock/LCK..modem)
3129 2. The "tty" name (/var/lock/LCK..ttyS2)
3130 3. The alternate device name (/var/lock/LCK..cua2)
3132 In the case of nested symbolic links, the lock files should be
3133 installed in the order the symlinks are resolved.
3135 Under no circumstances should an application hold a lock while waiting
3136 for another to be released. In addition, applications which attempt
3137 to create lock files for the corresponding alternate device names
3138 should take into account the possibility of being used on a non-serial
3139 port TTY, for which no alternate device would exist.
3141 Pseudoterminals (PTYs)
3143 Pseudoterminals, or PTYs, are used to create login sessions or provide
3144 other capabilities requiring a TTY line dicipline (including SLIP or
3145 PPP capability) to arbitrary data-generation processes. Each PTY has
3146 a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named
3147 /dev/tty[p-za-e][0-9a-f]. The kernel arbitrates the use of PTYs by
3148 allowing each master side to be opened only once.
3150 Once the master side has been opened, the corresponding slave device
3151 can be used in the same manner as any TTY device. The master and
3152 slave devices are connected by the kernel, generating the equivalent
3153 of a bidirectional pipe with TTY capabilities.
3155 Recent versions of the Linux kernels and GNU libc contain support for
3156 the System V/Unix98 naming scheme for PTYs, which assigns a common
3157 device, /dev/ptmx, to all the masters (opening it will automatically
3158 give you a previously unassigned PTY) and a subdirectory, /dev/pts,
3159 for the slaves; the slaves are named with decimal integers (/dev/pts/#
3160 in our notation). This removes the problem of exhausting the
3161 namespace and enables the kernel to automatically create the device
3162 nodes for the slaves on demand using the "devpts" filesystem.
git://git.onelab.eu / linux-2.6.git / blob