The SnapLock ComplianceClock ensures against tampering that might alter the retention period for WORM files. You must initialize the system ComplianceClock on each node that hosts a SnapLock aggregate. Once you initialize the ComplianceClock on a node, you cannot initialize it again.
The time on the system ComplianceClock is inherited by the volume ComplianceClock, which controls the retention period for WORM files on the volume. The volume ComplianceClock is initialized automatically when you create a new SnapLock volume.