Patent ID: 7111120

Claim:
A disk array controller, comprising: a channel interface unit to be connected with a host computer; a disk interface unit to be connected with a disk drive; a memory interface unit for storing control data for the disk drive; an interface platter on which the channel interface unit and the disk interface unit are mounted; a memory platter on which the memory unit is mounted; plural cables which couple the interface platter and the memory platter to each other; and a selector unit, coupled with the channel interface unit, the disk interface unit and the memory unit, which selects a request from a plurality of requests from the channel interface unit and the disk interface unit and supplies the selected request to the memory unit, wherein a path coupling the channel interface unit to a first cable is printed on the interface platter, wherein a path coupling the disk interface unit to a second cable different from said first cable is printed on the interface platter, wherein a path coupling the memory unit to a third cable different from said first and second cables is printed on the memory platter, and wherein the selector unit is mounted on the interface platter and is connected between said first, second and third cables so that connections are made between the channel interface unit and the memory unit and between the disk interface unit and the memory unit via said first, second and third cables based on the selected request.