Translations:Btrfs/22/en
Extend a volume
This is very easy because btrfs incorporates a volume manager. You only have to look for a free device. You may use a partition like /dev/sdz4 or you may use a raw device like /dev/sdz. Then add this device to your existing volume with btrfs device add. You may need to do a balance afterwards to redistribute some chunks.
root # btrfs device add [/dev/sdz4] /