Peter,
Sorrry I failed to mention that thea section of the batch file also deletes sanpshots over 5 days old.
"C:\Program Files\NetApp\SnapDrive\SDCLI" snap delete -d W -s OldSnap.5
"C:\Program Files\NetApp\SnapDrive\SDCLI" snap rename -d W -o OldSnap.4 -n OldSnap.5
"C:\Program Files\NetApp\SnapDrive\SDCLI" snap rename -d W -o OldSnap.3 -n OldSnap.4
"C:\Program Files\NetApp\SnapDrive\SDCLI" snap rename -d W -o OldSnap.2 -n OldSnap.3
"C:\Program Files\NetApp\SnapDrive\SDCLI" snap rename -d W -o OldSnap.1 -n OldSnap.2
"C:\Program Files\NetApp\SnapDrive\SDCLI" snap rename -d W -o Recent -n OldSnap.1
I was under the impression that inorder to do this snapdrive takes the volume offline.