Btrfs

Btrfs (B-tree file system, pronounced "Butter F S", "B-tree F S"[2]) is a GPL-licensed copy-on-write file system for Linux.   Btrfs is intended to address the lack of pooling, snapshots, checksums and integral multi-device spanning in Linux file systems, these features being crucial as the use of Linux scales upward into larger storage configurations common in the enterprise.[1] Chris Mason, the