Patent ID: 6477619
Filing Date: 2002-11-05
Classification: G06F

Abstract:
A disk array controller comprising:a plurality of disk array control units, each having one or more channel interface units for interfacing with a host computer; one or more disk interface units for interfacing with disk drives; a cache memory unit for temporarily storing data which is written to or read out of said disk drives; and a shared memory unit for storing control information of data transfer between each of said channel interface units and each of said disk interface units and said cache memory unit and control information for said disk drives, wherein each of said disk array control units implementing the data read/write operation in response to a data read/write request from said host computer by operating on each of said channel interface units to transfer data between an interface with said host computer and said cache memory unit and operating on each of said disk interface units to transfer data between said disk drives and said cache memory unit, wherein said channel interface units and disk interface units and said cache memory units in said disk array control units having their connection nodes interconnected through a first interconnection across the border of disk array control units, and wherein said channel interface units and disk interface units and said shared memory units in said disk array control units having their connection nodes interconnected through a second interconnection across the border of disk array control units.