Btrfs 関連ツールの実行例

Btrfs 関連ツールの実行例をメモ。Btrfs の公式 Wiki よりそのまま引用。

mkfs.btrfs: create a filesystem
btrfsctl: control program to create snapshots and subvolumes and scan devices
- Scan all devices looking for btrfs filesystems, or scan just one partition
  - btrfsctl -a
  - btrfsctl -A /dev/sda2
Snapshots and subvolumes
- mount -t btrfs /dev/sda2 /mnt/btrfs
- btrfsctl -S new_subvol_name /mnt/btrfs
- btrfsctl -s /mnt/btrfs/snapshot_of_root /mnt/btrfs
  - mount -t btrfs -o subvol=new_subvol /dev/sda2 /mnt/new_subvol
  - mount -t btrfs -o subvol=snapshot_of_root /dev/sda2 /mnt/snap
btrfsck: do a limited check of the FS extent trees.
btrfs-debug-tree: print all of the FS metadata in text form
- btrfs-debug-tree /dev/sda2 >& big_output_file
If a problem occures you can create an image of the fs with btrfs-image and send it to the devs. (All data will be zeroed, but metadata and the like is preserved.)
- btrfs-image -c 9 /dev/sda2 /tmp/btrfs_dump.z