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- Path: sparky!uunet!caen!uwm.edu!uwm.edu!usenet
- From: rick@ee.uwm.edu (Rick Miller, Linux Device Registrar)
- Newsgroups: comp.os.linux
- Subject: First Release of the Linux Device List
- Date: 17 Nov 1992 16:00:20 GMT
- Organization: Just me.
- Lines: 131
- Message-ID: <1eb4ukINN53j@uwm.edu>
- NNTP-Posting-Host: 129.89.2.33
- Summary: LOOK IT OVER! COMMENTS PLEASE!
- Keywords: TAPE, CD-ROM, HELP!
-
- The following is what I have so far in the way of a complete listing of
- devices for Linux. There are some gaps that need filling...
-
- For example, I don't have any minor numbers for TAPE drives yet, SCSI or
- otherwise. Same goes for CD-ROMs. Will those who have such things running
- let me know what major and minor numbers they've been using? Thanks.
-
- ---------------------------------------------------------------------------
-
- The Linux Device List
- maintained by rick@ee.uwm.edu (Rick Miller, Linux Device Registrar)
-
- Many thanks to richard@stat.tamu.edu and Jim Winstead Jr.
-
- Majors:
- 0. Unnamed . (unknown) .... for proc-fs, NFS clients, etc.
- 1. Memory .. (character) .. ram, mem, kmem, null, port, zero
- 2. Floppy .. (block) ...... fd[01][dhDH]{360,720,1200,1440} or fd[01]
- 3. Hard Disk (block) ...... hd[ab] or hd[ab][1-?] (Extended>4)
- 4. Tty ..... (character) .. tty{0,1-8,63,64-127,128-?} or ttys{0-3,1-4}
- 5. tty ..... (character) .. special tty: owner of its calling process.
- 6. Lp ...... (character) .. lp[0-2] or par[0-2]
- 7. Tape .... (block) ...... t[0-?] (reserved for Non-SCSI tape drives)
- 8. Scsi Disk (block) ...... sd[0-?] or sd[0-?][0-?]
- 9. Scsi Tape (block) ...... st[0-?]
- 10. Bus Mouse (character) .. bm, psaux (mouse)
- 11. CD-ROM .. (block) ...... scd
-
- Breakdown of minors by Majors:
- ------------------------------
- 0. Unnamed . (unknown) .... for proc-fs, NFS clients, etc.
- Minors?
-
- 1. Memory .. (character) .. ram, mem, kmem, null, port, zero
- 0. /dev/ram
- 1. (block): RAM-Disk (character): /dev/mem
- 2. /dev/kmem
- 3. /dev/null
- 4. /dev/port
- 5. /dev/zero
-
- 2. Floppy .. (block) ...... fd[01][dhDH]{360,720,1200,1440} or fd[01]
- Minors are [drive + [4 * type]] where drive 0-3 == A:-D: (floppy)
- and type is: 0: Autodetect 4: 720k in 3.5"
- 1: 360k in 5.25" 1.2M 5: 360k in 5.25" 1.2M
- 2: 1.2M in 5.25" 1.2M 6. 720k in 5.25" 1.2M
- 3: 360k in 3.5" 7. 1.44M in 3.5" 1.44
-
- 3. Hard Disk (block) ...... hd[ab] or hd[ab][1-?] (Extended>4)
- 0. First HD (/dev/hda), whole drive including Master Boot Record.
- 1-4. Partitions on the first HD.
- 5-8. Logical partitions within an extended partition on first HD.
- 64. Second HD (/dev/hdb), whole drive including Master Boot Record.
- 65-68. Partitions on the second HD.
- 69-72. Logical partitions within an extended partition on second HD.
-
- Notes: BE *VERY* CAREFUL WITH /dev/hda AND /dev/hdb!! These two
- devices signify the *entire* *drive*, not just one partition.
- The only things that use /dev/hda or /dev/hdb are things that
- need to read/change the partition table (like fdisk).
-
- Linux doesn't order anything. It perceives partitions in the
- order in which they appear in the partition table. Thus,
- /dev/hd?1 may follow /dev/hd?2 in the cylinder numbering.
-
- The names of the hard drives are not the same as under Minix.
-
- 4. Tty ..... (character) .. tty{0,1-8,63,64-127,128-?} or ttys{0-3,1-4}
- 0. /dev/tty0: This is the currently active Virtual Console.
- 1-63. /dev/tty#: Specific virtual consoles.
- 64-127. /dev/ttys*: Serial ports.
- 128-191. /dev/pty[??]: PTY Masters.
- 192-255. /dev/pty[??]: PTY Slaves.
-
- Notes: There are several constants set in the kernel sources which
- can be changed to compile a more customized kernel. They're
- found in [/usr/src]/linux/include/linux/tty.h:
-
- NR_CONSOLES The number of virtual consoles.
- NR_SERIALS The number of serial lines.
- NR_PTYS The number of pty's.
-
- 5. tty ..... (character) .. special tty: owner of its calling process.
- 0. /dev/tty: the tty that owns the process calling it.
-
- 6. Lp ...... (character) .. lp[0-2] or par[0-2]
- 1-3. Parallel (printer) ports. (Increasable in include/linux/lp.h)
-
- Notes: The number of line printers is defined by LP_NO which is
- found in [/usr/src]/linux/include/lp.h.
-
- Even if you only have one printer port, Linux may still call
- it /dev/lp1 (rather than /dev/lp0). Watch during boot-up to
- see how it recognizes your printer port.
-
- 7. Tape .... (block) ...... t[0-?] (reserved for Non-SCSI tape drives)
- This one's just getting started. No minor numbers are yet assigned.
- It's not even in the source code.
-
- 8. Scsi Disk (block) ...... sd[0-?] or sd[0-?][0-?]
- Minors numbers are [[16 * HostID] + partition]
-
- Notes: The maximum number of SCSI drives is defined by MAX_SD
- found in [/usr/src]/linux/kernel/blk_drv/scsi/sd.h.
-
- 9. Scsi Tape (block) ...... st[0-?]
- Quoting from the source-code:
- void do_st_request(void)
- {
- panic("There is no st driver.\n\r");
- }
-
- Notes: For future reference, the maximum number of SCSI tapes
- is defined by MAX_ST which is found in
- [/usr/src]/linux/kernel/blk_drv/scsi/st.h.
-
- 10. Bus Mouse (character) .. bm, psaux (mouse)
- (If I recall, X Windows requires that
- /dev/mouse be linked to one of these...)
- 0. /dev/bm: (Logitec?) bus mouse
- 1. /dev/psaux: PS/2 mouse port
- 2. /dev/bm: MicroSoft bus mouse
- 3. /dev/bm: ATI XL bus mouse
-
- 11. CD-ROM .. (block) ...... scd
- Minors?
-
- ---------------------------------------------------------------------------
-
- Rick Miller <rick@ee.uwm.edu> | <rick@discus.mil.wi.us> Ricxjo Muelisto
- Occupation: Husband, Father, WEPCo. WAN Mgr., Discus Sys0p, and Linux fan
-