Failed tree root

Hi!

After a short loss of contact with an underlying disk controller my btrfs partition is unmountable.

dmesg provides the following information:

[356850.853787] btrfs bad tree block start 0 14102771924992
[356850.853808] btrfs: failed to read tree root on dm-0
[356850.859218] btrfs: open_ctree failed

Is this type of error known to be fixable by the unstable btrfsck (20120328)? I am currently running kernel 3.2.0-25.

Best regards
Øystein Middelthun