From: Kai Krakow <hurikhan77+btrfs@gmail.com>
To: linux-btrfs@vger.kernel.org
Subject: Re: Filesystem not mountable after reset, bad tree block
Date: Sat, 07 Jan 2012 13:05:08 +0100 [thread overview]
Message-ID: <k0plt8-ljc.ln1@hurikhan.ath.cx> (raw)
In-Reply-To: 201201052359.47932.harv@ruin.nu
Hi!
Michael Andreen <harv@ruin.nu> schrieb:
> The find-root program seems to think there is a root (and poentially some
> older roots?), but not sure how to use that information.
[...]
> Anything else I can do to debug this or potentially recover a few bits
> before reformatting?
You could try the recovery programs from Josefs btrfs-progs tree[1]. You
could also try using kernel 3.2 which allows mounting in recovery mode. This
mode tries to find an older tree root. But I think your kernel did not keep
tree root backups for this purpose as it is AFAIR a feature of later
kernels.
Better use a newer kernel - best use 3.2. There are bunch of fixes which
improve the situation with lost file systems after unexpected reboots or
power outages.
HTH
Kai
[1] https://github.com/josefbacik/btrfs-progs
next prev parent reply other threads:[~2012-01-07 12:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-05 22:59 Filesystem not mountable after reset, bad tree block Michael Andreen
2012-01-07 12:05 ` Kai Krakow [this message]
2012-01-07 16:01 ` Hugo Mills
2012-01-08 22:34 ` Michael Andreen
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