Patent ID: 7249221

Claim:
A storage system comprising: a plurality of channel adapters being connected with one or more host systems; a plurality of first cache memories being connected with said channel adapters respectively and for temporarily storing data to be read and written by said one or more host systems; a plurality of disk drives a plurality of disk adapters being connected with said disk drives; a plurality of second cache memories being connected with said disk adapters respectively and for temporarily storing data to be read from or written in said disk drives; and a network for connecting said plurality of channel adapters with said plurality of disk adapters, wherein each channel adapter comprises: a processor, a memory, a host interface being connected to one host system, and at least one network interface connected to said network, wherein said processor, said memory, said host interface and said at least one network interface are being connected to each other, and wherein each disk adapter comprises: a processor, a memory, a disk drive interface connected to said disk drives, and at least one network interface connected to said network, wherein said processor, said memory, said disk drive interface and said at least one network interface are being connected to each other.