From: Tejun Heo <htejun@gmail.com>
To: ric@emc.com
Cc: Mark Lord <mlord@pobox.com>,
Linux-ide <linux-ide@vger.kernel.org>,
Jeff Garzik <jgarzik@pobox.com>
Subject: Re: faulty disk testing
Date: Tue, 05 Sep 2006 16:56:34 +0200 [thread overview]
Message-ID: <44FD9022.5060208@gmail.com> (raw)
In-Reply-To: <44FD8781.9040905@emc.com>
Ric Wheeler wrote:
>> One of the problems is that currently libata EH can take some minutes
>> recovering from an error condition. With partial request retry from
>> sd, a batch of consecutive bad sectors can make recovery take a
>> really long time. This needs fixing.
>
> So far, the new-init build has been running the recovery in the lab for
> about 40 minutes ;-)
Ouch. that's long. BTW, from the log you posted.
sd 1:0:0:0: SCSI error: return code = 0x08000002
sdb: Current: sense key: Medium Error
Additional sense: Unrecovered read error - auto reallocate failed
end_request: I/O error, dev sdb, sector 272900
Buffer I/O error on device sdb3, logical block 208640
Buffer I/O error on device sdb3, logical block 208641
Buffer I/O error on device sdb3, logical block 208642
Buffer I/O error on device sdb3, logical block 208643
Buffer I/O error on device sdb3, logical block 208644
Buffer I/O error on device sdb3, logical block 208645
Buffer I/O error on device sdb3, logical block 208646
Buffer I/O error on device sdb3, logical block 208647
This is sd failing the request and the error completion propagating
through fs/buffer and thus back to its user - probably md. It's a bit
weird that md doesn't drop the device at this point. I think it could
be that special metadata path thing you mentioned.
--
tejun
next prev parent reply other threads:[~2006-09-05 14:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-05 1:30 faulty disk testing Ric Wheeler
2006-09-05 11:57 ` Tejun Heo
2006-09-05 12:46 ` Ric Wheeler
2006-09-05 13:48 ` Mark Lord
2006-09-05 14:08 ` Tejun Heo
2006-09-05 14:15 ` Mark Lord
2006-09-05 14:45 ` Tejun Heo
2006-09-05 14:19 ` Ric Wheeler
2006-09-05 14:56 ` Tejun Heo [this message]
2006-09-05 15:48 ` Ric Wheeler
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