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Date:      Sun, 14 Apr 2002 23:46:42 -0700
From:      Terry Lambert <tlambert2@mindspring.com>
To:        Giorgos Keramidas <keramida@ceid.upatras.gr>
Cc:        Alexander Leidinger <Alexander@Leidinger.net>, dwcjr@inethouston.net, current@FreeBSD.ORG, sos@FreeBSD.ORG
Subject:   Re: ATA errors on recent -current
Message-ID:  <3CBA7752.4FD32D58@mindspring.com>
References:  <20020414050301.GA34066@leviathan.inethouston.net> <200204140834.g3E8YIJx000632@Magelan.Leidinger.net> <20020414223903.GA4253@hades.hell.gr>

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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.

-- Terry

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