The Delete User-Defined File System (DLTUDFS) command deletes an existing, unmounted user-defined file system (UDFS), and all the objects within it.
The command will fail if you have mounted the UDFS. Deletion of a UDFS will cause the deletion of all objects in the UDFS. If you do not have proper authority to delete all of the objects within a UDFS, then none of the objects will be deleted.