On Sat, Jun 9, 2018 at 7:56 PM, Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote: > > Indeed, the corrupted bytenr is 0x4bc98004. > Looks pretty like a bit flip in the 3rd lowest bit. > > It can be fixed by manually patching the corrupted leaf to get rid of > the bitflip. > I could provide a special branch of btrfs-progs to fix it easily. > > But before that, it's better to do a scrub to see if there is other > similar problems, so I could fix them all. > Do you think Simon should try -o ro and -o ro,norecovery and see if he can update backups the easy way first? And then use the offline scrub to check for additional problems? Simon, the offline scrub is done unmounted with 'btrfs check --check-data-csum <dev>' and it is a read-only check. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
