linux-ext4 - Re: 2nd Attempt

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Message-ID: <20130503213132.GA6032@thunk.org>
Date:	Fri, 3 May 2013 17:31:32 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Stephen Elliott <techweb@...world.com>
Cc:	'Andreas Dilger' <adilger@...ger.ca>, linux-ext4@...r.kernel.org
Subject: Re: 2nd Attempt - FSCK Errors

On Fri, May 03, 2013 at 07:42:55PM +0100, Stephen Elliott wrote:
> One thing maybe you could explain (and Andreas gave me his take too) is how
> you can multiply assigned blocks shared with "0" files. Andreas offered the
> suggestion that they may be in the same file. If this were really the case,
> I would suspect there to be some file corruption issues etc...

It could be that the blocks appear multiple times in the file; or it
could be the storage system is returning different data on subsequent
reads from the device.

What we need is a debugfs dump of the inode on the file system that is
having trouble.  A debugfs dump of the inode from a completely
underlated file system is not useful....

						- Ted
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