An advanced filesystem and volume manager offering data integrity, snapshots, compression and software RAID.
ZFS checksums every block to detect and repair silent data corruption (bit rot). It supports instant snapshots, transparent compression, and pooled storage. It powers TrueNAS and is popular on Proxmox. ZFS benefits from ECC RAM and plenty of memory for its cache (ARC).
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NAS(Network-Attached Storage)
A dedicated storage device connected to your network that lets multiple devices store and access files centrally.
RAID(Redundant Array of Independent Disks)
A method of combining multiple drives so they act as one, improving performance and/or protecting against drive failure.
Snapshot
A point-in-time, read-only copy of a filesystem or volume that lets you roll back changes instantly.