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Message-ID: <48EAB672.3010209@gmail.com>
Date: Tue, 07 Oct 2008 10:08:02 +0900
From: Tejun Heo <htejun@...il.com>
To: Linda Walsh <lkml@...nx.org>
CC: Smartmontools Mailing List
<smartmontools-support@...ts.sourceforge.net>,
Bruce Allen <ballen@...vity.phys.uwm.edu>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [smartmontools-support] inactive SATA drives won't stay in standby
or sleep, PATA models did. (fwd)
Linda Walsh wrote:
> So the real problem is why issuing a smart command isn't re-starting
> the drive -- or bringing it back from standby. Whereas a "normal" disk
> read seems to bring it back to normal functioning just fine (and can
> then do the smart-test).
>
> Does this give anyone ideas about where the problem might be? Also
> sorta explains why my hangs have been infrequent, because I've been
> periodically polling the temps of all the drives -- and only when I stop
> the polling would the drive timeout, then die the next morning when
> smartd tried to run a short test between 1 and 2 am.
Sounds like a firmware problem to me. Issuing ATA_CMD_VERIFY on block
0 before issuing test commands should work around the problem. Also,
which controller are you using? Can you post the failing kernel log?
--
tejun
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