Patent ID: 7243223

Claim:
A computer system, comprising: a host computer; a switch coupled to said host computer and configured to transfer data sent from said host computer; a storage system storing data transferred from said switch, said storage system comprising a plurality of disk drives which relate to a plurality of logical volumes, a disk controller including a plurality of disk control units each of which is connectable to the plurality of disk devices, and a common mutual connecting network which connects the plurality of disk control units with each other; and a management computer configured to manage or operate said switch, wherein said management computer sets or changes a logical path between said host computer and one of said logical volumes controlled by one of said disk control units based on usage information of said common mutual connecting network, wherein said usage information of said common mutual connecting network is decided based on access freciuency of a plurality of accesses between one of said disk control units and another of said disk control units.