Re: Kernel panics with scsi cdrom

Mon, 7 Apr 1997 20:47:48 -0400 (EDT)

On 7 Apr, wrote:
> Now don't laugh, but I use an old future Domain TMC850 scsi card to run
> a cdrom drive. Up until now its worked just fine, but in 2.1.32 I get
> kernel panics trying to do simple things like "ls." The message is:
> Kernel panic: scsi: unsupported message byte 3 received
> In swapper task - not syncing

I've been getting the same symptoms for the last three or four kernel
revisions, except that in my case it's unsupported message byte 128
(same TMC850 card). I just assumed that my hardware was getting
flakey, so I patched sd.c so that instead of panic'ing, it would reset
the SCSI bus. Once in a blue moon, I'll get into a state (on startup)
where the kernel loops on those messages for hours (until I hard reset
the machine). Otherwise, I get the occasional message, but the CDROM
works fine. The only down side is that trying to use my old 40MB Apple
(Quantum) SCSI drive (as a 40MB swap space) causes looping forever
(along with really high system load :).


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