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From: Martin <develop@imagmbh.de>
To: Chris Murphy <lists@colorremedies.com>
Cc: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: Re: recover corrupt BTRFS
Date: Mon, 06 Apr 2015 21:08:15 +0200
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Am Montag, 6. April 2015, 09:45:10 schrieb Chris Murphy:
> On Mon, Apr 6, 2015 at 5:40 AM, Martin <develop@imagmbh.de> wrote:
> > Hello!
> > 
> > I have to recover a corrupt btrfs. The size is approx 4.5 TB. The fs
> > became
> > corrupt by failure of a hardware-raid.
> 
> What raid level? What kind of failure? What is the current raid
> status? What was the mkfs.btrfs command used to create the file system
> OR what is the current profile used for data and metadata?

Hello Chris,

it was a hardware-RAID (3ware-Controller), RAID-5. There was a failure of 2 of 
6 disks. Because only one disk was physically damaged, I could "dd" the RAID 
to a new big disk with the help of 3Ware/Avago.

The stack was: hardware-raid --- Linux LVM --- btrfs. The metadata-profile was 
the default for a single drive, so it should be "dup".

Martin