The diffsnapshot option controls whether Tivoli® Storage Manager creates the differential snapshot when it runs a snapshot difference incremental backup.
If the differential snapshot is not created by Tivoli Storage Manager, the latest snapshot found on the volume is used as the differential snapshot and as the source for the backup operation.
The default value is to create the differential snapshot. This option is ignored the first time that the snapdiff option is used. The first time the snapdiff option is used on a volume, a snapshot must be created and used as the source for a full incremental backup. Snapshots that are created by Tivoli Storage Manager are deleted by Tivoli Storage Manager after the next snapshot difference incremental backup is complete.
Snapshots can be created with the Network Appliance FilerView tool. Use the latest parameter if you want Tivoli Storage Manager to use the most recent snapshot that was created with this or any other method. Snapshots that are created by methods outside of Tivoli Storage Manager are never deleted by Tivoli Storage Manager.
Snapshots can be created with the Network Appliance FilerView tool. Use the latest parameter if you want Tivoli Storage Manager to use the most recent snapshot that was created. Whatever method is used to create named snapshots, snapshot names that differ only by case will not work properly with the snapdiff option. Snapshots that are created by Tivoli Storage Manager will not have the casing problem. Snapshots that are created by methods outside of Tivoli Storage Manager are never deleted by Tivoli Storage Manager.
The -diffsnapshot option value of latest means that the operation uses the latest snapshot (the active snapshot).