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Date: Wed, 06 Nov 2002 10:57:41 +0100 (MET)
From: "Emmanuel FUSTE" <e.fuste@wanadoo.fr>
To: <phil@fifi.org>
Cc: <linux-kernel@vger.kernel.org>
References: <1036535689.3349.36.camel@rafale>   <87bs53qyli.fsf@ceramic.fifi.org>
Subject: Re: aic7xxx problem.  (PCI related =?iso-8859-1?Q?=3F)?=
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> Which hardware is connected to your SCSI adapter? (hint: cat /proc/scsi/scsi)
> 
> I've found out that some IBM hard disks give the above error when too
> many tagged commands are queued (firmware bug probably). I definitely
> have a DDRS-39130D drive which shows this behavior. The old SCSI
> driver (5.x) was not as bold as the 6.x driver which is in 2.4 with
> regards to queueing: the 6.x driver use 253 tagged command openings by
> default.
> 
> For me, passing `aic7xxx=tag_info:{{,,,8}}' to the kernel solved the
> problems. The above tells the aic7xxx driver to limit tagged queuing
> depth to 8 for the drive at ID 3 on the first aic7xxx adapter, but
> YMMV.
> 
> Phil.

Thanks Phil, unfortunately, this doesnt solve my problem.
The 5.x driver never worked for me on the 2940u2w, it lock the computer.

I could even trigger the kernel message with no devices attached to the scsi bus.
With the two adapters in the computer, when I issue a scsiadd -s 1, I've got the
errors but whithout  the hard lock.

For reference:
http://marc.theaimsgroup.com/?l=linux-kernel&m=99295558926036&w=2
http://marc.theaimsgroup.com/?l=linux-kernel&m=100852862320948&w=2

Is someone knew something about my pblm with the pci latency timer set to 0 ?

Emmanuel.

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