Btrfs is a modern copy on write (CoW) filesystem for Linux aimed at implementing advanced features while also focusing on fault tolerance, repair and easy administration. Btrfs is licensed under the GPL and open for contribution from anyone.

Single Device:

Multiple Devices (similiar to RAID):

Subvolumes are their own seperated namespaces and work like ZFS Datasets. They can be mounted seperately. Each Btrfs file system has a top-level subvolume with ID 5.

Create a subvolume:

List suvolumes:

Delete subvolume:

Swapfiles can be used by disabling CoW:

See Usage:

Btrfs can self heal itself or check for errors with scrubbing. Start:

Rebalance the filesystem.

Btrfs can use snapshots

Btrfs can be resized.