btrfs check: unrecognized option '--version' usage: btrfs check [options] <device> Check structural inegrity of a filesystem (unmounted). Check structural inegrity of an unmounted filesystem. Verify internal trees' consistency and item connectivity. In the repair mode try to fix the problems found. WARNING: the repair mode is considered dangerous -s|--super <superblock> use this superblock copy -b|--backup use the backup root copy --repair try to repair the filesystem --readonly run in read-only mode (default) --init-csum-tree create a new CRC tree --init-extent-tree create a new extent tree --check-data-csum verify checkums of data blocks -Q|--qgroup-report print a report on qgroup consistency -E|--subvol-extents <subvolid> print subvolume extents and sharing state -r|--tree-root <bytenr> use the given bytenr for the tree root -p|--progress indicate progress

usage: btrfs check [options] <device> Check structural inegrity of a filesystem (unmounted). Check structural inegrity of an unmounted filesystem. Verify internal trees' consistency and item connectivity. In the repair mode try to fix the problems found. WARNING: the repair mode is considered dangerous -s|--super <superblock> use this superblock copy -b|--backup use the backup root copy --repair try to repair the filesystem --readonly run in read-only mode (default) --init-csum-tree create a new CRC tree --init-extent-tree create a new extent tree --check-data-csum verify checkums of data blocks -Q|--qgroup-report print a report on qgroup consistency -E|--subvol-extents <subvolid> print subvolume extents and sharing state -r|--tree-root <bytenr> use the given bytenr for the tree root -p|--progress indicate progress