btrfs

Undelete

Undelete scripts:

• undelete-btrfs
• Changaco/btrfs-undelete
  • working with subvolumes

FS check

Better to unmount the partition first, then:

btrfs check /dev/mapper/root

Snapshots

• see also backup.md for tools to automate snapshots

Resize

• Docs: resize

Online (mounted) resize (also works for mounted root fs):

btrfs filesystem resize max /mnt