On Tue, Jan 14 2014 at 11:47:18 AM, Mitchel Humpherys <mitch.special@xxxxxxxxx> wrote:
>
> Other possibly relevant information:
>
> $ sudo btrfs filesystem show /local
> Label: none uuid: 03a83a42-0bc7-42a2-bed6-df19c825897c
> Total devices 2 FS bytes used 380.83GiB
> devid 1 size 410.18GiB used 164.03GiB path /dev/sda6
> devid 2 size 465.76GiB used 220.00GiB path /dev/sdc
>
> Btrfs v3.12
>
> $ uname -a
> Linux mitchelh-linux 3.12.6-1-ARCH #1 SMP PREEMPT Fri Dec 20 19:39:00 CET 2013 x86_64 GNU/Linux
>
Well I tried btrfsck --repair and now it appears to be unmountable...
$ sudo btrfsck --repair /dev/sda6
enabling repair mode
Checking filesystem on /dev/sda6
UUID: 03a83a42-0bc7-42a2-bed6-df19c825897c
checking extents
Backref 122643533824 parent 5 root 5 not found in extent tree
Backref 122643533824 parent 123939635200 not referenced back 0x55ef990
Incorrect global backref count on 122643533824 found 2 wanted 1
backpointer mismatch on [122643533824 4096]
...
Incorrect global backref count on 846095245312 found 1 wanted 0
backpointer mismatch on [846095245312 4096]
Backref 846103539712 parent 2 root 2 not found in extent tree
Backref 846103539712 root 2 not referenced back 0x15d4460
Incorrect global backref count on 846103539712 found 1 wanted 0
backpointer mismatch on [846103539712 4096]
repaired damaged extent references
checking free space cache
cache and super generation don't match, space cache will be invalidated
checking fs roots
root 256 inode 257 errors 800, odd csum item
found 43901995420 bytes used err is 1
total csum bytes: 363657120
total tree bytes: 9200095232
total fs tree bytes: 8303808512
total extent tree bytes: 473149440
btree space waste bytes: 2280314010
file data blocks allocated: 864793686016
referenced 757795065856
Btrfs v3.12
$ sudo mount -a
mount: wrong fs type, bad option, bad superblock on /dev/sda6,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
fstab entry:
/dev/sda6 /local btrfs skip_balance 0 0
and here's the kernel log from the mount -a:
[13462.391937] btrfs: device fsid 03a83a42-0bc7-42a2-bed6-df19c825897c devid 2 transid 95625 /dev/sdc
[13462.532136] btrfs: device fsid 03a83a42-0bc7-42a2-bed6-df19c825897c devid 1 transid 95625 /dev/sda6
[13479.393750] btrfs: device fsid 03a83a42-0bc7-42a2-bed6-df19c825897c devid 1 transid 95625 /dev/sda6
[13479.394386] btrfs: disk space caching is enabled
[13479.995184] parent transid verify failed on 625292959744 wanted 95626 found 95625
[13479.995191] btrfs: failed to read log tree
[13480.051334] btrfs: open_ctree failed
> wanted 95626 found 95625
So close! :)
Am I completely hosed?
--
Mitch
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