Btrfs
Appearance
- list available filesystems
btrfs filesystem show
- create subvolume
btrfs subvolume create /mnt/nonsense
where /mnt is the mountpoint of the btrfs volume
- create snapshot
mkdir /mnt/snapshots btrfs subvolume snapshot /mnt/nonsense /mnt/snapshots/vrijdag
- add a new device
btrfs device add /dev/sda8 /mnt
- balance the data
btrfs device balance /mnt