A method, apparatus and system of restoration of a parent LUN through modification of a read-write clone LUN as the parent LUN are disclosed. In one embodiment, the method includes transforming a snapshot of a parent LUN from a read-only state to a read-write clone LUN using a target module of a storage system. The method also includes changing a first data structure of a block transfer protocol to refer to the parent LUN as another clone LUN. Further, the method includes modifying a second data structure of the block transfer protocol to refer to the read-write clone LUN as the parent LUN. Then, the method includes restoring the parent LUN when the modification of the second data structure is completed.