Btrfs
A modern Linux filesystem with snapshots, checksums and built-in RAID-like features.
Btrfs is an alternative to ZFS that's built into the Linux kernel. It's popular on Synology and openSUSE and great for cheap, instant snapshots.
Related articles
ZFS
An advanced filesystem and volume manager offering data integrity, snapshots, compression and software RAID.
Snapshot
A point-in-time, read-only copy of a filesystem or volume that lets you roll back changes instantly.
Checksum
A small fingerprint of data used to detect corruption or verify integrity.