SuSE Support Database

Title: SCSI: Using more than 2 SCSI CD-ROM drives

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SCSI: Using more than 2 SCSI CD-ROM drives

Symptom:

Linux can't access more then 2 SCSI CD-ROM drives.

Cause:

By default only two device files are created for SCSI CD-Roms during the installation of S.u.S.E. Linux. However Linux supports up to 16 CD-ROM drives including CD changers.

Solution:

You have to create further device files manually.

Here is an excerpt from /usr/doc/howto/CDROM-HOWTO.gz :


  4.3.12.  SCSI Driver
         
         Principal author: David Giller
    Multi-session support: yes (depending on drive)
   Multiple drive support: yes
  Loadable module support: yes
     Reading audio frames: no 
             Auto-probing: yes
              Device file: /dev/scd0, major 11
       Configuration file: cdrom.h
     Kernel config option: SCSI CDROM support?
              README file: none

  There are kernel command line option specific to each type of SCSI
  controller. See the SCSI HOWTO for more information.

  Multiple drives are supported (up to the limit of the maximum number 
  of devices on the SCSI bus). Create device files with major number 11
  and minor numbers starting at zero:

       # mknod /dev/scd0 b 11 0
       # mknod /dev/scd1 b 11 1

  While the kernel driver itself does not support reading digital audio
  frames, some SCSI drives have the capability and will work with the
  cdda2wav program (which uses the generic SCSI kernel interface).
Login as user root and enter the following commands :
mknod /dev/scd2 b 11 2
mknod /dev/scd3 b 11 3
mknod /dev/scd4 b 11 4
mknod /dev/scd5 b 11 5
mknod /dev/scd6 b 11 6
mknod /dev/scd7 b 11 7
mknod /dev/scd8 b 11 8
Now you can access up to 9 CD-ROM drives. If you create further devices, it is possible to access up to 16 drives.

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Keywords: SCSI, CDROM, DEVICES, MKNOD, DEV, SCD, CD, SERVER

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SDB-sw_cdrom_3devices, Copyright SuSE GmbH, Nuremberg, Germany - Version: 18. Jun 1998
Impressum - Last generated: 24. Feb 1999 15:26:56 by maddin with sdb_gen 1.00.0