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Date:      	Wed, 12 Jul 1995 14:24:48 -0700 (PDT)
From:      Tom Samplonius <tom@misery.sdf.com>
To:        Karl Denninger <karl@Mcs.Net>
Cc:        "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com>, karl@mcs.com, freebsd-hackers@FreeBSD.ORG
Subject:   Re: SCSI disk wedge
Message-ID:  <Pine.BSF.3.91.950712141910.1573C-100000@misery.sdf.com>
In-Reply-To: <199507122010.PAA00810@Jupiter.mcs.net>

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On Wed, 12 Jul 1995, Karl Denninger wrote:

> > Can you be more specific about which controller and/or drives you are
> > seing this with?  Trying to recall the mail for the last month with
> > ``disk channel hangs'' as the keyword doesn't work for me, my poor old
> > mind is not what it use to be :-)
> 
> Aha1742 and AHA 27xx -- both EISA.
> 
> On the 27xx driver we get an error, on the 1742 the failure is silent.
> Other than that, the behavior is identical.

  You still haven't mentioned what devices you are using.

  The problem is most certainly related to the type of drives/devices as 
the 1742 and 2742 code is completely different.  I have both of these 
cards (my 2742 is dual-channel), and have used a 1742 extensively with no 
problems.  Under old snaps, the 2742 used to hang under heavy load, but 
I found this to be fixed a couple of weeks before 2.0.5R.  Under both of 
these cards I can run multiple parallel "iozone"s to multiple drives 
without a problem (which is the heaviest disk load that I can simulate).

Tom 



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