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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Gene Heskett <gene.heskett@gmail.com>
Cc: linux-ide@vger.kernel.org
Subject: Re: Drive breakdown or bug?
Date: Sun, 16 Nov 2008 18:33:58 +0000	[thread overview]
Message-ID: <20081116183358.4d7f61eb@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <200811161325.57557.gene.heskett@gmail.com>

> Nov 16 12:55:11 coyote kernel: [57888.336419]          res 51/40:08:18:c6:ba/40:00:2a:00:00/e0 Emask 0x9 (media error)
> Nov 16 12:55:11 coyote kernel: [57888.336473] ata1.00: status: { DRDY ERR }
> Nov 16 12:55:11 coyote kernel: [57888.336498] ata1.00: error: { UNC }

Unrecoverable read error on the disk is what is being reported

> So I am running badblocks, and have collected a lengthy list. But the drive 
> is not re-allocating them, and has not re-allocated any bad blocks according
> to smartctl.

It cannot reallocate a block which it cannot read as the data on it would
be lost silently at that point. It should reallocate such blocks on a
write to them (which is why fsck.ext3 knows how to rewrite bad inode
blocks when recovering stuff)

> but the last 5 all occurred while amdump was running earlier today, and
> the last 5 is all the drive apparently keeps.

Yes

> The question then is:
> 
> Bad drive, (un-)known bug, or configuration?

Probably bad drive but could also be bad drive as a symptom of something
else (eg heat)

Alan

      reply	other threads:[~2008-11-16 18:33 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-16 18:25 Drive breakdown or bug? Gene Heskett
2008-11-16 18:33 ` Alan Cox [this message]

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