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Date:      Fri, 7 Mar 2003 13:26:15 -0800
From:      David Schultz <das@FreeBSD.ORG>
To:        "Marc G. Fournier" <scrappy@hub.org>
Cc:        Scott Long <scott_long@btc.adaptec.com>, freebsd-stable@FreeBSD.ORG
Subject:   Re: bug in aac driver ... ?
Message-ID:  <20030307212615.GA63881@HAL9000.homeunix.com>
In-Reply-To: <20030307143810.O18433@hub.org>
References:  <20030305224856.R38115@hub.org> <20030307090449.GB61037@HAL9000.homeunix.com> <3E68B705.4070409@btc.adaptec.com> <20030307143810.O18433@hub.org>

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Thus spake Marc G. Fournier <scrappy@hub.org>:
> > David Schultz wrote:
> > > I don't know why VM_KMEM_SIZE would tickle a RAID controller
> > > problem, but I've seen timeout message similar to the one you
> > > describe with a flaky SCSI controller.  (Try statically compiling
> > > all relevant drivers into the kernel if you're not already.)  The
> > > fix for me was to reduce the tag depth with camcontrol.  Try a
> > > value around 8 or so; there shouldn't be much, if any, of a
> > > performance difference.
> > >
> > > 	camcontrol tags devicename -N8
> > >
> > > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > > with "unsubscribe freebsd-stable" in the body of the message
> >
> > The aac driver does not use the CAM SCSI interface for accessing its
> > RAID arrays, so changing parameters there will have no effect.
> 
> Oh good, I thought I was doing something wrong when I kept getting errors
> trying to access it through camcontrol :)

Brain fart, my apologies.  aac != ahc

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