linux-ext4 - Re: fsck.ext4: Group descriptors look bad... trying backup blocks...

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Message-ID: <alpine.LFD.2.00.0904201652540.17316@xpc17.ast.cam.ac.uk>
Date:	Mon, 20 Apr 2009 16:53:23 +0100 (BST)
From:	Jeremy Sanders <jss@....cam.ac.uk>
To:	Eric Sandeen <sandeen@...hat.com>
cc:	Theodore Tso <tytso@....edu>, linux-ext4@...r.kernel.org
Subject: Re: fsck.ext4: Group descriptors look bad... trying backup
 blocks...

On Mon, 20 Apr 2009, Eric Sandeen wrote:

> Eric Sandeen wrote:
>> Theodore Tso wrote:
>>> On Mon, Apr 20, 2009 at 12:43:37PM +0100, Jeremy Sanders wrote:
>>>> It takes a day or two to do the sync. I've only done it twice (one with
>>>> the old kernel, once with the new fedora testing kernel) and it happened
>>>> both times. I'm afraid the statistics are rather low number here.
>>>>
>>>> I did a different faster test (just copying my home directory lots of
>>>> times), but I wasn't able to get it to fail. That test didn't use much
>>>> disk space, however. Maybe it's worth just dd'ing a few TB of data onto
>>>> the device and seeing whether that fails.
>>>>
>>>> I didn't reboot this time - I did last time. I just unmounted the file
>>>> system and fsckd it. The filesystem is 8.2TB and the data is around
>>>> 2.5TB.
>>
>> I think trying a filesystem with just under 8T would be a useful test too.
>
> One other question - do you make use of xattrs on this filesystem?

No.

Jeremy

-- 
Jeremy Sanders <jss@....cam.ac.uk>   http://www-xray.ast.cam.ac.uk/~jss/
X-Ray Group, Institute of Astronomy, University of Cambridge, UK.
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