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SubjectRe: Scsi timeout / kernel panic
Date
I've had similar problems w/ my setup here.  (Tyan S1668D MB, w/
Mylex BT-958 controllers going to Seagate drives.) I've
managed to mitigate the problem by lowering down the controllers
to 10MB/sec from the optimum of 40MB/sec.

This has been an issue ever since switching to 2.2.* series
but it appears to be insiduous. I've swapped out every component
on the system (MB, cpus, cards, drives, et al) and it still happends
but on a similar system (same MB, et al) it doesn't have a problem.

Cables are the same (all granite digital, so I know that they're fine).

If you happen to find anything I'd be interested as well.

Steve
----- Original Message -----
From: "Steven Sparks" <sparks@socketware.com>
To: "David Edwards" <gecker@offbeatmedia.com>
Cc: <linux-kernel@vger.rutgers.edu>
Sent: Saturday, November 20, 1999 14:27
Subject: Re: Scsi timeout / kernel panic


> With the exception of the buslogic stuff, these are identical to the
> errors I'm receiving with my quantum drives. This is three people
> talking about at least four machines with quantum scsi drives locking
> up in the same manner. this has begun happening since going from 2.0.x
> to 2.2.x. I'm beginning to think that this is valid, not just an
> anomaly of my system.
>
> -S
>
>
> David Edwards wrote:
> >
> > I was wondering if someone can offer some advice as to how I can track
this
> > scsi error down. Below is the message printed to the console before the
> > system locked up.
> >
> > scsi : aborting command due to timeout : pid 236637, scsi0, channel 0,
id
> > 0, lun
> > 0 Write (10) 00 00 3a b0 1b 00 00 02 00
> > scsi0: Unable to Abort Command to Target 0 - CCB Reset
> > SCSI host 0 abort (pid 236615) timed out - resetting
> > SCSI bus is being reset for host 0 channel 0.
> > scsi0: Resetting BusLogic BT-930 due to Target 0
> > scsi0: *** BusLogic BT-930 Initialized Successfully ***
> > Kernel panic: scsi_free:Trying to free unused memory
> > In swapper task - not syncing
> >
> > Thanks, David
> >
> > >Hello,
> > >
> > >I have a couple servers experiencing some lockup problems. I get these
> > >types of messages printed to the console. Can anyone offer some advise
as
> > >to what might be causing this? I ran memtest extensively on these
servers
> > >and did not find any memory errors. Here's the info. Thanks.
> > >
> > >[gecker@ns1 gecker]$ uname -a
> > >Linux ns1.reliablehosting.com 2.2.10 #1 Thu Nov 4 11:55:20 PST 1999
i686
> > >unknown
> > >
> > >scsi0 : BusLogic BT-930
> > > Vendor: QUANTUM Model: FIREBALL SE6.4S Rev: PJ09
> > > Type: Direct-Access ANSI SCSI revision: 02
> > >
> > >And the errors.
> > >scsi : aborting command due to timeout : pid 4062
> > >29, scsi0, channel 0, id 0, lun 0 Write (6) 01 00 93 02 00
> > >scsi0: Aborting CCB #406236 to Target 0
> > >
> > >scsi0 channel 0 : resetting for second half of retries.
> > >SCSI bus is being reset for host 0 channel 0.
> > >scsi0: Sending Bus Device Reset CCB #406320 to Target 0
> > >scsi : aborting command due to timeout : pid 406230, scsi0, channel 0,
id
> > >0, lun
> > > 0 Write (6) 01 40 47 04 00
> > >scsi0: Unable to Abort Command to Target 0 - CCB Reset
> > >
> > >
> > >-
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in
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> >
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> -
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