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Date: Thu, 27 Jun 2013 09:58:42 -0400
From: Josef Bacik <jbacik@fusionio.com>
To: =?iso-8859-1?Q?St=E9phane?= Mutz <stephane.mutz@gmail.com>
CC: <linux-btrfs@vger.kernel.org>
Subject: Re: Problem with btrfsck / couurpted filesystem
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On Thu, Jun 27, 2013 at 03:54:33PM +0200, Stéphane Mutz wrote:
> Hello,
> 
> I'm trying to fix a btrfs file system. BTRFSCK reports errors in the
> extend tree.
> I've tryong to use --repair option but it ended up with an assertion
> failure.
> 
> I'm also trying to understand how the filesystem can have become corrupted.
> I'm running Ubuntu 12.10.
> 
> Any suggestion on ways to fix the problem would be really appreciated.
> 

Are you using the btrfs-progs from git?  If not pull that down and build it and
run the btrfsck in there, and then capture the output if it fails.  Thanks,

Josef