The snapvault snapshot_rename command enables you to rename an existing Snapshot copy on a secondary system
sdcli snapvault snapshot_rename [-m MachineName] -o OldName -n NewName {-d MountPoint | -G guidlist}
-o OldName specifies the name of the existing Snapshot copy that you want to change on the secondary system.
-n NewName specifies the new name of the Snapshot copy on the secondary system. The new name must not yet exist.
-d MountPoint specifies the mount point that identifies the disk on the primary system.
-G guidlist specifies a list of GUIDs of disks on the primary system.