Re: CDROM troubles

[Phil Stracchino <alaric@babcom.com>]

On Sun, May 06, 2001 at 03:05:00AM -0700, Phil Stracchino wrote:
> Hey folks,
> I'm seeing a problem with mounting CDs using a Toshiba XM-6401TA CDROM
> drive attached to an Adaptec AHA1542CF controller (scsi1) on kernel 2.4.3
> and 2.4.4.  The behavior seems to be fairly consistent as follows:
> 
> first mount and unmount works normally, no unusual events logged
> second mount and unmount works normally, no unusual events logged
> third mount locks up the machine.  looks like a kernel panic.
> 
> Any ideas?


Panic is confirmed.  This time, it lived long enough to log:
 
May  6 14:05:05 babylon5 kernel: Kernel panic: scsi_free:Bad offset

Since it involves the CDROM, the aha1542 driver is implicated.  Why it's
getting a bad offset, I don't understand enough about the SCSI drivers to
know; all the scsi_free calls in aha1542.c look identical to me.
 
Would any Linux SCSI gurus care to let me know any diagnostic procedures
recommended for nailing this one?


-- 
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