The present invention provides techniques, including a method and system, for relocating data between storage systems. The upper lid is disposed on the top chamber and moves between a closed position covering a first opening and an open position exposing the first opening. The system includes a power feed bus for supplying electrical signals and a circuit monitor coupled to the feed bus. Two snapshots are consolidated by updating block references in snapshot meta data. The width of said semiconductor laser element is not smaller than W2h. A mechanism is provided such that a load is generated on the contact member by the motion of the guide towards the fixed function against the returning spring immediately before the mobile contact point contacts the fixed contact point.