You can use the snapdrive snap delete command to delete a Snapshot copy.
SnapDrive for UNIX deletes the existing contents of the LUNs you specify in the snap delete command line and replaces them with the contents of the LUNs in the Snapshot copy you specify.
This example displays a list of what is being deleted:
# snapdrive snap delete -v filer1:/vol/vol1/snap1 snap2 snap3 snapdrive: deleting filer1:/vol/vol1/snap1 filer1:/vol/vol1/snap2 filer1:/vol/vol1/snap3