I have two independent Linux installations my notebook, both sharing the
same btrfs partition as root file system, but installed on different
subvolumes.
I hibernated one Linux (Mint 15 64 bit). Hibernation data is stored on
the swap file, which is used exclusively by this system.
Then 2 events happened.
1) I accidentally ran the other system, which wasn't hibernated - Ubuntu
12.10. Realizing the problem, I waited until the system booted up, and
then shutdowned it.
Then I opened the hibernated Mint 15. Restoration went successful, and I
never thought I am in trouble.
2) Immediately after that, by coincidence, the battery fell down,
brutally powering down the computer.
After that, I am unable to repair/mount the root btrfs partition,
however I try (I built the current btrfs-tools from git). Dmesg displays
only one error entry: btrfs: open_ctree failed.
I know, that if one those two events happened separately, there would be
no problem. The problem arose only when those two events happened
simultaneously.
So I guess I am experiencing one of the corner cases.
What are my prospects to restoring my data? I have several subvolumes on
the hard drive, some of them were not touched by the accident at all.
Adam Ryczkowski
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