btrfs-find-root - Man Page

btrfs-find-root [options] <device>

btrfs-find-root is used to find the satisfied root, you can filter by root tree's objectid, generation, level.

-a

Search through all metadata extents, even the root has been already found.

-g <generation>

Filter root tree by it's original transaction id, tree root's generation in default.

-o <objectid>

Filter root tree by it's objectid,tree root's objectid in default.

-l <level>

Filter root tree by b-tree's level, level 0 in default.

btrfs-find-root will return 0 if no error happened. If any problems happened, 1 will be returned.

mkfs.btrfs(8)