A storage system includes a plurality of disk drives, one or more
controller boards for controlling data read and write from/to the
plurality of the disk drives, and a Fibre Channel switching board for
controlling path switching between the controller boards and the
plurality of the disk drives. The Fibre Channel switching board has a
control logical circuit for adjusting a control signal system between the
controller boards and the disk drives according to a connection
confirmation signal indicating whether or not the control signal cable is
connected to the Fibre Channel switching board.