From owner-freebsd-current  Mon Apr 15  0:22:42 2002
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From: Søren Schmidt <sos@freebsd.dk>
Message-Id: <200204150721.g3F7LDS07711@freebsd.dk>
Subject: Re: ATA errors on recent -current
In-Reply-To: <3CBA7752.4FD32D58@mindspring.com>
To: Terry Lambert <tlambert2@mindspring.com>
Date: Mon, 15 Apr 2002 09:21:13 +0200 (CEST)
Cc: Giorgos Keramidas <keramida@ceid.upatras.gr>,
	Alexander Leidinger <Alexander@Leidinger.net>, dwcjr@inethouston.net,
	current@FreeBSD.ORG, sos@FreeBSD.ORG
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It seems Terry Lambert wrote:
> Giorgos Keramidas wrote:
> > > > ad0: READ command timeout tag=1 serv=1 - resetting
> > > > ata0: resetting devices .. ad0: invalidating queued requests
> > > > done
> > >
> > > Turn off tagged queing. S?ren knows about this error and tries to
> > > reproduce it (but fails as far as I know).
> > 
> > I've seen this quite a few times, but I can't reliably reproduce it
> > yet.  It seems to hit me a lot when the ad0 drive spins like crazy
> > doing stuff that is heavy on disk I/O.  Disabling tag queueing now to
> > see if this fixes things.  But even if it does, I think I should
> > enable it again and help S?ren track this down, if I can.
> 
> Is your drive perchance an IBM DTLA?
> 
> It's known to have these problems.

Cool! would you like to share where that information is available so
I can possibly work around the problem ??

-Søren

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