btrfs: failed to read chunk root

btrfs: failed to read chunk root

[Espen Trydal]

Hello,

trying out btrfs on my linux installation. I am running Funtoo with
Linux 3.0 kernel. After a reboot kernel panicked (no access to error
log since it is my root volume that failed). I get this using a rescue
cd (2.6.38, btrfs v 0.19) and then trying to mount :

[=C2=A0 752.129118] btrfs bad tree block start 0 131072
[=C2=A0 752.129152] btrfs: failed to read chunk root on sda5
[=C2=A0 752.132190] btrfs: open_ctree failed
[ 1132.984600] device label deux devid 1 transid 86 /dev/sdb3
[ 1171.796682] device fsid 9d42de57e2bebde7-4824b05acb3c538d devid 1
transid 346 /dev/sda5

Trying btrfsck:
btrfsck: disk-io.c:721: open_ctree_fd: Assertion `!(!chunk_root->node)'=
 failed.

It had worked alright during the last couple of reboots. Before
rebooting I created a new btrfs volume which I am able to mount
without problems in rescue mode.

Thanks for any help,
Espen
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" =
in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: btrfs: failed to read chunk root

[Espen Trydal]

Just out of curiosity, even if there is no solution to my problem at
the moment, could somebody explain to me what this error means and
what happened? As far as I know it was just a normal reboot. Hardware
failure (so a mirrored device would have saved it) or software
failure?

Regards,
Espen


2011/8/14 Espen Trydal <espen.trydal@gmail.com>:
> Hello,
>
> trying out btrfs on my linux installation. I am running Funtoo with
> Linux 3.0 kernel. After a reboot kernel panicked (no access to error
> log since it is my root volume that failed). I get this using a rescu=
e
> cd (2.6.38, btrfs v 0.19) and then trying to mount :
>
> [=C2=A0 752.129118] btrfs bad tree block start 0 131072
> [=C2=A0 752.129152] btrfs: failed to read chunk root on sda5
> [=C2=A0 752.132190] btrfs: open_ctree failed
> [ 1132.984600] device label deux devid 1 transid 86 /dev/sdb3
> [ 1171.796682] device fsid 9d42de57e2bebde7-4824b05acb3c538d devid 1
> transid 346 /dev/sda5
>
> Trying btrfsck:
> btrfsck: disk-io.c:721: open_ctree_fd: Assertion `!(!chunk_root->node=
)' failed.
>
> It had worked alright during the last couple of reboots. Before
> rebooting I created a new btrfs volume which I am able to mount
> without problems in rescue mode.
>
> Thanks for any help,
> Espen
>
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" =
in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html