Article 16709 of comp.os.linux: Path: samba!concert!gatech!swrinde!sdd.hp.com!cs.utexas.edu!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 | Ricxjo Muelisto Occupation: Husband, Father, WEPCo. WAN Mgr., Discus Sys0p, and Linux fan