Using an volume-based backup and restore process has these advantages:
- The backup and restore is performed at the storage subsystem
layer, so the storage engines are not involved in the backup process.
- The backup and restore deals with data at the byte level, and has the
ability to back up and restore the entire SAN File System global namespace
in a single operation.
- The backup and restore of the complete file system (metadata and file
data) is performed as it happens at the volume level.