To provide an improved technique for controlling a storage resource such as a disk drive and an I/O port in response to requirement of a user to the resource.

A centralized SIoD system controls the storage resource installed in a storage sub-system and connection therein via a network switch, in response to the requirement of the user, in an embodiment. In the embodiment, the user brings a new resource into an online condition, for example, defines a route between the resources, and provides billing, payment and other accounting information based on constitution and connection established in response to the requirement of the user.