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Date: Fri, 5 Jul 2002 16:26:19 +0200
From: Jens Axboe <axboe@suse.de>
To: Tomas Konir <moje@molly.vabo.cz>
Cc: venom@sns.it, linux-kernel@vger.kernel.org
Subject: Re: IBM Desktar disk problem?
Message-ID: <20020705142619.GN1007@suse.de>
References: <Pine.LNX.4.43.0207051524480.9092-100000@cibs9.sns.it> <Pine.LNX.4.44L0.0207051606050.32493-100000@moje.ich.vabo.cz>
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On Fri, Jul 05 2002, Tomas Konir wrote:
> On Fri, 5 Jul 2002 venom@sns.it wrote:
> 
> > On Fri, 5 Jul 2002, Jens Axboe wrote:
> > 
> > > Date: Fri, 5 Jul 2002 12:40:37 +0200
> > > From: Jens Axboe <axboe@suse.de>
> > > To: venom@sns.it
> > > Cc: linux-kernel@vger.kernel.org
> > > Subject: Re: IBM Desktar disk problem?
> > >
> > > On Fri, Jul 05 2002, venom@sns.it wrote:
> > > >
> > > > HI,
> > > > I was trying kernel 2.5 with TCQ enabled.
> > > > I tried it on three Desktar disk (manufactured in Thailand
> > > > in february 2001) model dtla 305020.
> > > >
> > > > All three disk died after some week, without
> > > > any signal of being dying.
> > > > I was starting to suspect about an HW problem.
> > > >
> > > > With 2.4 kernels, no tcq, they could work
> > > > without any problem for almost 8 months, but now,
> > > > I moved those disk to test systems to test tcq support
> > > > and all died badly. This is not an heat problem, since
> > > > thay staty in a CED conditioned at 18C.
> > >
> > > This is a puzzling report. I wouldn't recommend that anyone use tcq in
> > > 2.5 actually, since even I do not know what state it is currently in. I
> > > would seriously recommend 2.4 + tcq patches instead.
> > >
> > > That said, are your disks completely dead now? As in they do not work
> > > with a regular 2.4 kernel anymore?!
> > 
> > Right now they are good just for the trash box.
> > There is no way they could work, and I listen a noisy
> > tic-tac frrr tic-tac from the head of the disks...
> > 
> > 
> > I would think to an HW problem, but why all three together?
> > and why exacly when I tested tcq?
> > 
> 
> hi i have similar problem.
> No dead disks, but after two days testing tcq patches (on 2.4). I 
> got the two ATA errors (smartctl said). 
> I think that it's no good to test tcq on IBM disks. My disk was without 
> any problems one year. Two problems now is not normal.

I find this hard to believe (why would using a different set of
read/write commands show problems?!), and so far the evidence is far
from conclusive. I'll be watching it, though.

> For final i think, that tcq patch is not fully stable, becouse on high 
> disk load i get oops and have to reboot. I have no problem when i remove 
> tcq patches.
> (high load i mean copy cca 20GiB between two IBM disks).

Any reason you haven't reported this?! Please do so.

-- 
Jens Axboe

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