Marc MERLIN wrote on 2015/08/24 07:10 -0700:
On Mon, Aug 24, 2015 at 01:11:26PM +0800, Qu Wenruo wrote:
So, my last bet will be, using "btrfs-find-root -a" to find the root
with highest generation, and use the new root to exec "btrfsck -b
<bytenr of highest gen root>".
The latest btrfs-find-root would output possible tree root by
descending order of its generation. You'll find proper bytenr quite
easy.
But be prepared as "btrfs-find-root -a" will iterate all metadata
space, so it will takes a long long time to finish.
And until it scanned all the space, it won't output anything.
This is what I got:
myth:~# btrfs-find-root -a /dev/mapper/crypt_sdd1
Superblock thinks the generation is 39538
Superblock thinks the level is 1
Well block 4243456(gen: 3 level: 0) seems good, but generation/level doesn't
match, want gen: 39538 level: 1
Well block 4194304(gen: 2 level: 0) seems good, but generation/level doesn't
match, want gen: 39538 level: 1
myth:~#
Does it mean there is no other block I can/should use?
Thanks,
Marc
Oh, it seems to be a new bug in btrfs-find-root.
I'll fix it first then.
Thanks,
Qu
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