What versions for kernel and btrfs-progs? Have you tried only '-o ro,recovery' ? What kernel messages do you get for this?
Failure to read chunk tree message is usually bad. If you have a recent enough btrfs-progs, try 'btrfs check' on the volume without --repair and post the results; recent would be 4.4.1 or better. Also a good idea is to post btrfs-show-super -f, there's a scant possibility there's more than one backup chunk root and possible to explicitly use an older one (but btrfs check--chunk-root is only in v4.5 of btrfs-progs). Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
