Comment # 3 on bug 1205649 from Thomas Leroy

$ sudo btrfs-find-root /dev/dm-0
ERROR: failed to read block groups: Input/output error
Superblock thinks the generation is 277797
Superblock thinks the level is 1
Found tree root at 1107050496 gen 277797 level 1
Well block 1096679424(gen: 277796 level: 1) seems good, but generation/level
doesn't match, want gen: 277797 level:
Well block 11190272(gen: 277795 level: 1) seems good, but generation/level
doesn't match, want gen: 277797 level: 1
Well block 5242880(gen: 277794 level: 1) seems good, but generation/level
doesn't match, want gen: 277797 level: 1
Well block 12304384(gen: 277710 level: 1) seems good, but generation/level
doesn't match, want gen: 277797 level: 1
Well block 12255232(gen: 277709 level: 0) seems good, but generation/level
doesn't match, want gen: 277797 level: 1
Well block 11616256(gen: 277709 level: 0) seems good, but generation/level
doesn't match, want gen: 277797 level: 1
Well block 13582336(gen: 277101 level: 0) seems good, but generation/level
doesn't match, want gen: 277797 level: 1
Well block 13090816(gen: 277101 level: 0) seems good, but generation/level
doesn't match, want gen: 277797 level: 1