Configuring SCSI CD-ROM drives

[Lincoln Peters]

I found the following information in /var/log/messages:

Aug 17 12:49:02 ODYSSEUS kernel: scsi1 : Adaptec AIC7XXX EISA/VLB/PCI SCSI 
HBA DRIVER, Rev 6.2.6
Aug 17 12:49:02 ODYSSEUS kernel:         <Adaptec 2902/04/10/15/20/30C SCSI 
adapter>
Aug 17 12:49:02 ODYSSEUS kernel:         aic7850: Ultra Single Channel A, 
SCSI Id=7, 3/253 SCBs
Aug 17 12:49:02 ODYSSEUS kernel:
Aug 17 12:49:17 ODYSSEUS kernel:   Vendor: PLEXTOR   Model: CD-ROM PX-12TS   
  Rev: 1.02
Aug 17 12:49:17 ODYSSEUS kernel:   Type:   CD-ROM                            
  ANSI SCSI revision: 02
Aug 17 12:49:17 ODYSSEUS kernel:   Vendor: PLEXTOR   Model: CD-ROM PX-12TS   
  Rev: 1.02
Aug 17 12:49:17 ODYSSEUS kernel:   Type:   CD-ROM                            
  ANSI SCSI revision: 02
Aug 17 12:49:17 ODYSSEUS kernel:   Vendor: PLEXTOR   Model: CD-ROM PX-12TS   
  Rev: 1.02
Aug 17 12:49:17 ODYSSEUS kernel:   Type:   CD-ROM                            
  ANSI SCSI revision: 02
Aug 17 12:49:17 ODYSSEUS kernel:   Vendor: PLEXTOR   Model: CD-ROM PX-12TS   
  Rev: 1.02
Aug 17 12:49:17 ODYSSEUS kernel:   Type:   CD-ROM                            
  ANSI SCSI revision: 02
Aug 17 12:49:17 ODYSSEUS kernel:   Vendor: PLEXTOR   Model: CD-ROM PX-12TS   
  Rev: 1.02
Aug 17 12:49:17 ODYSSEUS kernel:   Type:   CD-ROM                            
  ANSI SCSI revision: 02
Aug 17 12:49:17 ODYSSEUS kernel:   Vendor: PLEXTOR   Model: CD-ROM PX-12TS   
  Rev: 1.02
Aug 17 12:49:17 ODYSSEUS kernel:   Type:   CD-ROM                            
  ANSI SCSI revision: 02
Aug 17 12:49:17 ODYSSEUS kernel:   Vendor: PLEXTOR   Model: CD-ROM PX-12TS   
  Rev: 1.02
Aug 17 12:49:17 ODYSSEUS kernel:   Type:   CD-ROM                            
  ANSI SCSI revision: 02
Aug 17 12:49:17 ODYSSEUS kernel: Attached scsi CD-ROM sr1 at scsi1, channel 
0, id 0, lun 0
Aug 17 12:49:17 ODYSSEUS kernel: Attached scsi CD-ROM sr2 at scsi1, channel 
0, id 1, lun 0
Aug 17 12:49:17 ODYSSEUS kernel: Attached scsi CD-ROM sr3 at scsi1, channel 
0, id 2, lun 0
Aug 17 12:49:17 ODYSSEUS kernel: Attached scsi CD-ROM sr4 at scsi1, channel 
0, id 3, lun 0
Aug 17 12:49:17 ODYSSEUS kernel: (scsi1:A:0): 10.000MB/s transfers 
(10.000MHz, offset 15)
Aug 17 12:49:17 ODYSSEUS kernel: sr1: scsi-1 drive
Aug 17 12:49:17 ODYSSEUS kernel: (scsi1:A:1): 10.000MB/s transfers 
(10.000MHz, offset 15)
Aug 17 12:49:17 ODYSSEUS kernel: sr2: scsi-1 drive
Aug 17 12:49:17 ODYSSEUS kernel: (scsi1:A:2): 10.000MB/s transfers 
(10.000MHz, offset 15)
Aug 17 12:49:17 ODYSSEUS kernel: sr3: scsi-1 drive
Aug 17 12:49:17 ODYSSEUS kernel: (scsi1:A:3): 10.000MB/s transfers 
(10.000MHz, offset 15)
Aug 17 12:49:17 ODYSSEUS kernel: sr4: scsi-1 drive
Aug 17 12:49:17 ODYSSEUS kernel: scsi : 1 host left.

It looks like it successfully detected all 7 CD-ROM drives and set up 4 of 
them.  It looks to me like they should be accessible at /dev/sr1, /dev/sr2, 
/dev/sr3, and /dev/sr4, but none of those devices seem to exist.

And why would it detect 7 SCSI devices but only set up 4 or them?


>From: ME <dugan at passwall.com>
>Reply-To: <talk at nblug.org>
>To: talk at nblug.org
>Subject: Re: Configuring SCSI CD-ROM drives
>Date: Sat, 17 Aug 2002 13:54:29 -0700 (PDT)
>
>On Sat, 17 Aug 2002, Lincoln Peters wrote:
> > I just picked up a used CD rack with 7 CD-ROM drives, all daisy-chained
> > together using SCSI.  I have hooked it up to a SCSI controller that
> > successfully identified all 7 CD-ROM drives, but now that I have the 
>SCSI
> > controller configured on my RedHat 7.3 box, I can't figure out how to 
>access
> > the drives!
>
>If the SCSI card finds them all at boot, that is good. If it does not,
>then fix that first.
>
>When Linux starts up, check your logs and search for (case
>insensitive) "cd" or "sr" or "scsi" to find the section where SCSI drives
>are found.
>
>Once the Linux kernel can find them, they should be available and assigned
>to /dev/sr0 /dev/sr1 /dev/sr2 ...
>
> > I checked /proc/scsi/scsi, and the only thing listed is my CD-RW (which 
>used
> > the ide-scsi driver).  No mention of any other SCSI devices.  Anyone 
>know
> > what I should be doing?  Could the ide-scsi driver be conflicting with 
>the
> > other SCSI driver?
>
>Check the logs to see what the kernel says. If it says it has found the
>drives,then, you are - or should be in business.
>
>-ME
>
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