See Resolution
NetApp API for snapshotting exchange LUN’s by default creates a snapshot with the date and time included in the snapshot title. This means a new Netvault job would have to be created for the snapshot every day to make sure the most recent snapshot is backed up.
Default NetApp snapshots have a naming convention of example nightly.0, nightly.1 etc with nightly.0 always representing the most recent snapshot. This means netvault can backup the most recent snapshot with one job as we only need to select the nightly.0 every day.
To work around this problem it is possible through the NetApp exchange snapshot API to force the snapshot to have the same name by using the “select a backup naming convention for the newest created backup” option.
This gives you the option to use the xxx_recent naming convention. This means the most recent backup will always have the same name xxx_recent and the previous most recent backup will be relabeled in the time stamp format allowing previous snapshots to be stored on the same volume.