From: Gareth Clay <gareth.clay@gmail.com>
To: linux-btrfs@vger.kernel.org
Subject: Unmountable btrfs filesystem - 'unable to find logical' / 'no mapping'
Date: Tue, 15 Jul 2014 14:35:22 +0100 [thread overview]
Message-ID: <CABibBbuGtAC7Rpptdd_wF7m87MSqg8zUEHvWSFsfk3KH+w2Jmg@mail.gmail.com> (raw)
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Hi there,
I noticed yesterday that the mount points on my btrfs RAID1 filesystem
had become read-only. On a reboot, the filesystem fails to mount. I
wondered if someone here might be able offer any advice on how to
recover (if possible) from this position?
dmesg is showing the following errors
[61355.392226] btrfs: bdev /dev/sdd errs: wr 3175131, rd 2633223,
flush 0, corrupt 0, gen 0
[61356.205444] BTRFS critical (device sdd): unable to find logical
457140613120 len 4096
[61356.207007] BTRFS critical (device sdd): No mapping for
457140613120-457140617216
[61356.207007]
[61356.210005] BTRFS critical (device sdd): unable to find logical
457140613120 len 4096
[61356.211532] BTRFS critical (device sdd): No mapping for
457140613120-457140617216
[61356.211532]
[61356.214587] Failed to read block groups: -5
[61356.234306] btrfs: open_ctree failed
[61380.234793] btrfs: device label server-mirror devid 3 transid 40496 /dev/sdc
[61380.829916] btrfs: allowing degraded mounts
[61380.829918] btrfs: disk space caching is enabled
btrfsck /dev/sdc:
btrfsck: volumes.c:1104: btrfs_num_copies: Assertion '!(ce->start >
logical || ce->start + ce->size < logical)' failed.
Aborted
btrfs fi show:
Label: 'server-mirror' uuid: 2fec5bfc-aa24-4e1d-a18d-18da768c5ea5
Total devices 2 FS bytes used 962.99GiB
devid 2 size 1.82TiB used 977.03GiB path /dev/sdd
devid 3 size 1.82TiB used 977.03GiB path /dev/sdc
Btrfs v3.12
uname -a:
Linux ubuntu-pc 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
I've attached my dmesg.log gzipped to keep within the mailing list size limits.
Thanks for any help you might be able to offer!
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next reply other threads:[~2014-07-15 13:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-15 13:35 Gareth Clay [this message]
2014-07-16 8:00 ` Unmountable btrfs filesystem - 'unable to find logical' / 'no mapping' Duncan
2014-07-17 23:09 ` Gareth Clay
2014-07-18 10:01 ` Duncan
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