S
Snapshot
Definition
Snapshot is a point-in-time copy of a file system or volume that captures the state of data at the moment of creation. Snapshots use copy-on-write (CoW) or redirect-on-write (RoW) techniques, making them nearly instantaneous and space-efficient — only changed blocks consume additional storage. Snapshots enable rapid backup, disaster recovery testing, and data recovery. Immutable snapshots provide ransomware protection by preventing modification or deletion.
