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Date: Sat, 17 Oct 1998 17:50:03 +0100
From: Karl Pielorz <kpielorz@tdx.co.uk>
Organization: TDX - The Digital eXchange
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To: "Justin T. Gibbs" <gibbs@narnia.plutotech.com>
CC: current@FreeBSD.ORG
Subject: Re: SCSI / CAM error or warning output?
References: <199810171541.JAA11982@narnia.plutotech.com>
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"Justin T. Gibbs" wrote:
> 
> In article <36287AC1.3F0C0D9C@tdx.co.uk> you wrote:
> > ahc2 is a 2940UW, with 3 x Quantum drives on it.
> 
> Funny.  They look very much like Seagate drives to me.

Ugh... Sorry, Quantum on the brain... ;-)

> This is a nice Adaptec cable *without* a built in terminator, right?

Yes... ;-)
 
> > This happens when the drives are 'busy' (but not totally thrashed)...
> 
> Does it only happen before the tag count is reduced, or does it happen
> regardless of how man, "tagged openings now X" messages you see for the
> offending target?

Hmmm... Looking through the vast amounts of console output I've captured, it
appears to happen any time - sometimes theres "tagged openings now XX"
messages, other times theres not... (i.e. the first thing that appears on the
console is "ahc2:A:10: no active SCB for reconnecting target - issuing BUS
DEVICE RESET"
 
> It looks like, at least for this particular rev of the firmware on these
> drives, the drives continue to take in transactions above and beyond
> their internal tag limit, hang up probably blocking on a resource shortage,
> then do not properly clean up all pending transactions when we whap them
> with a Bus Device Reset Message.  The Adaptec driver then starts seeing
> transactions returned by the device that are no longer pending (they should
> have been killed by the BDR) and complains.
> 
> You should look to see if there is later firmware available for this
> drive.

Ok, I am doing now... Thanks for the info...

Regards,

Karl

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