Patent ID: 7096286

Claim:
A disk array adaptable to communicate with an externally located high-order device, the disk array device device comprising: a channel adapter that controls data transmission and reception with the high-order device; a storage device that stores data; a storage device control board to which the storage device is connected; a disk adapter that is connected to the storage device via the storage device control board and controls data transmission and reception with the storage device; and a management unit that is respectively connected to the disk adapter and the channel adapter, wherein the storage device control board includes: a connection circuit that is connected to the storage device, and switch circuits that are respectively disposed at an input side and an output side of the connection circuit and are switchable between a connected mode where they are connected to an adjacent storage device control board and an independent mode where they are separated from the adjacent storage device control board, and the switch circuits are switchable between the connected mode and the independent mode by an output signal from the management unit.