Patent ID: 7779082

Claim:
A method for managing configuration of a computer system including a host computer and a storage system with a first port and a real volume in which data is stored, the method comprising: providing a first port identifier for the first port, the first port being used by the host computer to access the real volume via a network; providing a virtualization device between the host computer and the storage system, the virtualization device providing a virtual storage volume to the host computer for storing data in the real volume and comprising: a port processing device for managing communication between the host system, the real volume, and the virtual storage volume; a name table including information identifying the real volume associated with the first port identifier and information identifying a second port associated with the virtual storage volume; a routing table including information identifying the real volume associated with the virtual storage volume; assigning the first port identifier to the second port which comprises the port of the virtual storage volume; and assigning a unique World Wide Name (WWN) to each of the first port and the second port.