SCSA10-1 Objective 6.4 - Restore data from and delete a Solaris UFS snapshot
Restore data from a UFS snapshot and delete the UFS snapshot.
This is a misleading objective in some ways, although it makes an important point. A UFS snapshot is simply a temporary copy of a filesystem, a snapshot in time of a live filesystem. The UFS snapshot itself cannot be used to restore a filesystem, but a backup of it can, as with a ufsdump of the snapshot, can be used with the standard recovery procedures to restore the original filesystem to the time of the fssnap command execution.
There are tricks to deleting a UFS snapshot. While rebooting the system will flush any snapshots since they are temporary files, less drastic measures are also available as described in this brief page from Sun’s docs site.