Patent ID: 8521953

Claim:
A storage device comprising: a controller enclosure that includes a storing section; and a first controller and a second controller that carry out redundant access control on the storing section; two or more additional enclosures, serially coupled to the controller enclosure, each of which includes an additional storing section and a first additional controller and a second additional controller that carry out redundant access control on the additional storing section; a first route through which the first controller of the controller enclosure is serially coupled to the first additional controllers of the additional enclosures; and a second route through which the second controller of the controller enclosure is serially coupled to the second additional controllers of the additional enclosures, wherein the order of coupling the first additional controllers on the first route is identical to an order of adding the additional enclosures, and the order of coupling the second additional controllers on the second route is different from the order of adding the additional enclosures.