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Subject: Re: BTRFS not mountable, recover won't work
From: Malte Eggers <m.eggers@campus.tu-berlin.de>
To: Qu Wenruo <quwenruo@cn.fujitsu.com>, <linux-btrfs@vger.kernel.org>
Date: Mon, 10 Apr 2017 12:40:35 +0200
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On Mon, 2017-04-10 at 16:53 +0800, Qu Wenruo wrote:
> 
> Then try chunk recovery
> ------
>   btrfs rescue chunk-recover /dev/dm-0
> ------
> 
> It can be very slow since it may scan the full device.
> 
> Thanks,
> Qu
> 
> > > Thanks,
> > > Qu
> > 
> > Thank you
> > 
Thank you for your help this far
After some two hours, it finally finished, but not with the result that
I was hoping for:
~# btrfs rescue chunk-recover /dev/dm-0
Scanning: DONE in dev0                        
No valid btrfs found
open with broken chunk error
Chunk tree recovery failed