I have a btrfs RAID 6. I have lousy hard drives, one failed, and another failed during recovery. Now I am without parity and cannot rebuild--a third drive is throwing read errors on a few sectors. Since I can't remove it, I overwrote the bad sectors with zero's using dd. Now during rebuild I get a few errors like this:
BTRFS info (device sdc): csum failed ino 257 off 3985240064 csum 2566472073 expected csum 1136819032
kernel BUG at /build/linux-SMWX37/linux-3.12.9/fs/btrfs/extent_io.c:2082!
...the rebuild stops
I think btrfs doesn't know what do do without any parity for repair, so it throws an error and aborts.
I figured I could just delete the affected files, but inode 257 does not map to anything.
btrfs inspect-internal inode-resolve -v 257 /data
ioctl ret=-1, error: No such file or directory
Any suggestions for manually clearing inode 257, or otherwise repairing my filesystem?