btrfs는 fsck로 체크 못하고, btrfs 유틸리티의 check 명령을 통해서 확인해야 한다.
# fsck /dev/mmcblk2p9 fsck from util-linux 2.37.4 If you wish to check the consistency of a BTRFS filesystem or repair a damaged filesystem, see btrfs(8) subcommand 'check'. # btrfs btrfs btrfs-convert btrfs-find-root btrfs-image btrfs-map-logical btrfs-select-super btrfsck btrfstune # btrfs check /dev/mmcblk2p9 Opening filesystem to check... Checking filesystem on /dev/mmcblk2p9 UUID: a6226cd4-fc4e-4e20-8861-5870feefb3da [1/7] checking root items [2/7] checking extents [3/7] checking free space tree [4/7] checking fs roots [5/7] checking only csums items (without verifying data) [6/7] checking root refs [7/7] checking quota groups skipped (not enabled on this FS) found 12189671424 bytes used, no error found total csum bytes: 11890008 total tree bytes: 14303232 total fs tree bytes: 180224 total extent tree bytes: 229376 btree space waste bytes: 1957387 file data blocks allocated: 12175368192 referenced 12171370496 |
man은 안되서 --help를 보는데 내용이 부실하긴 하다. restore와 rescue는 어떨 때 쓸 수 있으려나?
# btrfs --help usage: btrfs [--help] [--version] [--format <format>] [-v|--verbose] [-q|--quiet] <group> [<group>...] <command> [<args>] btrfs balance start [options] <path> Balance chunks across the devices btrfs balance pause <path> Pause running balance btrfs balance cancel <path> Cancel running or paused balance btrfs balance resume <path> Resume interrupted balance btrfs balance status [-v] <path> Show status of running or paused balance btrfs check [options] <device> Check structural integrity of a filesystem (unmounted). btrfs device add [options] <device> [<device>...] <path> Add one or more devices to a mounted filesystem. btrfs device delete <device>|<devid> [<device>|<devid>...] <path> btrfs device remove <device>|<devid> [<device>|<devid>...] <path> Remove a device from a filesystem btrfs device scan [-d|--all-devices] <device> [<device>...] btrfs device scan -u|--forget [<device>...] Scan or forget (unregister) devices of btrfs filesystems btrfs device ready <device> Check and wait until a group of devices of a filesystem is ready for mount btrfs device stats [options] <path>|<device> Show device IO error statistics btrfs device usage [options] <path> [<path>..] Show detailed information about internal allocations in devices. btrfs filesystem df [options] <path> Show space usage information for a mount point btrfs filesystem du [options] <path> [<path>..] Summarize disk usage of each file. btrfs filesystem show [options] [<path>|<uuid>|<device>|label] Show the structure of a filesystem btrfs filesystem sync <path> Force a sync on a filesystem btrfs filesystem defragment [options] <file>|<dir> [<file>|<dir>...] Defragment a file or a directory btrfs filesystem resize [options] [devid:][+/-]<newsize>[kKmMgGtTpPeE]|[devid:]max <path> Resize a filesystem btrfs filesystem label [<device>|<mount_point>] [<newlabel>] Get or change the label of a filesystem btrfs filesystem usage [options] <path> [<path>..] Show detailed information about internal filesystem usage . btrfs inspect-internal inode-resolve [-v] <inode> <path> Get file system paths for the given inode btrfs inspect-internal logical-resolve [-Pvo] [-s bufsize] <logical> <path> Get file system paths for the given logical address btrfs inspect-internal subvolid-resolve <subvolid> <path> Get file system paths for the given subvolume ID. btrfs inspect-internal rootid <path> Get tree ID of the containing subvolume of path. btrfs inspect-internal min-dev-size [options] <path> Get the minimum size the device can be shrunk to btrfs inspect-internal dump-tree [options] <device> [<device> ..] Dump tree structures from a given device btrfs inspect-internal dump-super [options] device [device...] Dump superblock from a device in a textual form btrfs inspect-internal tree-stats [options] <device> Print various stats for trees btrfs property get [-t <type>] <object> [<name>] Get a property value of a btrfs object btrfs property set [-f] [-t <type>] <object> <name> <value> Set a property on a btrfs object btrfs property list [-t <type>] <object> Lists available properties with their descriptions for the given object btrfs qgroup assign [options] <src> <dst> <path> Assign SRC as the child qgroup of DST btrfs qgroup remove [options] <src> <dst> <path> Remove a child qgroup SRC from DST. btrfs qgroup create <qgroupid> <path> Create a subvolume quota group. btrfs qgroup destroy <qgroupid> <path> Destroy a quota group. btrfs qgroup show [options] <path> Show subvolume quota groups. btrfs qgroup limit [options] <size>|none [<qgroupid>] <path> Set the limits a subvolume quota group. btrfs quota enable <path> Enable subvolume quota support for a filesystem. btrfs quota disable <path> Disable subvolume quota support for a filesystem. btrfs quota rescan [-sw] <path> Trash all qgroup numbers and scan the metadata again with the current config. btrfs receive [options] <mount> btrfs receive --dump [options] Receive subvolumes from a stream btrfs replace start [-Bfr] <srcdev>|<devid> <targetdev> <mount_point> Replace device of a btrfs filesystem. btrfs replace status [-1] <mount_point> Print status and progress information of a running device replace operation btrfs replace cancel <mount_point> Cancel a running device replace operation. btrfs rescue chunk-recover [options] <device> Recover the chunk tree by scanning the devices one by one. btrfs rescue super-recover [options] <device> Recover bad superblocks from good copies btrfs rescue zero-log <device> Clear the tree log. Usable if it's corrupted and prevents mount. btrfs rescue fix-device-size <device> Re-align device and super block sizes. Usable if newer kernel refuse to mount it due to mismatch super size btrfs rescue create-control-device Create /dev/btrfs-control (see 'CONTROL DEVICE' in btrfs(5)) btrfs rescue clear-uuid-tree Delete uuid tree so that kernel can rebuild it at mount time btrfs restore [options] <device> <path> btrfs restore [options] -l <device> Try to restore files from a damaged filesystem (unmounted) btrfs scrub start [-BdqrRf] [-c ioprio_class -n ioprio_classdata] <path>|<device> Start a new scrub. If a scrub is already running, the new one fails. btrfs scrub cancel <path>|<device> Cancel a running scrub btrfs scrub resume [-BdqrR] [-c ioprio_class -n ioprio_classdata] <path>|<device> Resume previously canceled or interrupted scrub btrfs scrub status [-dR] <path>|<device> Show status of running or finished scrub btrfs send [-ve] [-p <parent>] [-c <clone-src>] [-f <outfile>] <subvol> [<subvol>...] Send the subvolume(s) to stdout. btrfs subvolume create [-i <qgroupid>] [<dest>/]<name> Create a subvolume btrfs subvolume delete [options] <subvolume> [<subvolume>...] btrfs subvolume delete [options] -i|--subvolid <subvolid> <path> Delete subvolume(s) btrfs subvolume list [options] <path> List subvolumes and snapshots in the filesystem. btrfs subvolume snapshot [-r] [-i <qgroupid>] <subvolume> { <subdir>/<name> | <subdir> } btrfs subvolume get-default <path> Get the default subvolume of a filesystem btrfs subvolume set-default <subvolume> btrfs subvolume set-default <subvolid> <path> Set the default subvolume of the filesystem mounted as default. btrfs subvolume find-new <path> <lastgen> List the recently modified files in a filesystem btrfs subvolume show [options] <path> Show more information about the subvolume (UUIDs, generations, times, snapshots) btrfs subvolume sync <path> [<subvol-id>...] Wait until given subvolume(s) are completely removed from the filesystem. btrfs help [--full] [--box] Display help information btrfs version Display btrfs-progs version Use --help as an argument for information on a specific group or command. Options for --format are: text, json |
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