Patent ID: 7016961

Claim:
A computer system comprising: a network file server controller to be coupled to a plurality of computers, said network file server controller receives an access request from said computers; and a storage device coupled to said network file server controller, said storage device has a storage area configured with a plurality of disks for storing data in response to said access request and is allocated to a plurality of Internet Protocol (IP) addresses, wherein said storage area is divided into a plurality of regions, wherein said network file server controller has set therein relations so that a first IP address of said IP addresses is allocated to a first region of said regions and a second IP address of said IP addresses is allocated to a second region of said regions, wherein said network file server controller responds to said received access request, which includes an IP address, based on said relations set therein regarding the allocated IP addresses and said regions, and wherein said first IP address corresponds to a first operating system executed in a first computer of first plurality of computers and said second IP address corresponds to a second operating system executed in a second computer of said plurality of computers.