Re: [LUG] PANIC ide-scsi

[Mark Evans <mpe@xxxxxxxxxxxxxxxxxxxxxx>]

Simon Waters wrote:
> Eek - my desktop box panic'ed....
>
> I was poking around with SCSI trying to sort something out with a
> CDR, and it started to refuse to run "cdrecord -scanbus", hanging on
> the second scsibus.
>
> Spitting many errors
>
> messages
>
> Oct 24 09:45:46 derek kernel: ]
> Oct 24 09:45:48 derek last message repeated 181 times
> Oct 24 09:45:48 derek kernel: scsi : aborting command due to timeout
> : pid 72049
> 95, scsi1, channel 0, id 0, lun 0 Test Unit Ready 00 00 00 00 00
> Oct 24 09:45:48 derek kernel: ]

This is scsi1, usually ide-scsi will show up as scsi0. Unless you have 
an actual SCSI interface in the machine.

It's also possible for usb-storage devices to create phantom SCSI 
devices. Especially those which don't quite conform to the spec, which 
includes quite a few cameras.

> syslog
>
>
> Oct 24 09:40:43 derek kernel: ide-scsi: [[ 12 0 0 0 24 0 0 0 0 0 0 0 ]
> Oct 24 09:40:43 derek kernel: ]
> Oct 24 09:40:43 derek kernel: ide-scsi: expected 36 got 72 limit 36
> Oct 24 09:40:43 derek kernel: hdd: lost interrupt
> Oct 24 09:40:43 derek kernel: ide-scsi: The scsi wants to send us
> more data than
> ~ expected - discarding data
>
> The panic occurred running on shutdown (I realised this wasn't a
> healthy state for a kernel), so not a major problem
>
> The box has been up for eternity (well in computer time).
>
> I think it was mindlessly poking at non-existent SCSI devices that
> did this, but still I don't think it should have panic'ed. It might
> also have been trying to mount a blank CD<doh>.
>
> Anyone any clues if this is known, or if they can reproduce it?
>
> Got to rush - seeing a guy about a CD I just recorded.
>
> After reboot ide-scsi working fine AFAICT.
>
> Since my tape drive has disappeared this reboot I'm thinking maybe
> hardware fault on tape drive.

Are you using the IDE driver for the tape. Sometimes the ide-scsi driver 
dosn't like being used on an IDE channel which also has devices using 
the IDE drivers. Which may be the reason Knoppix uses ide-scsi for all 
CDROM/DVD drives.

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