Patent ID: 8281305

Claim:
A computer system comprising: at least one storage subsystem and a computer device which are connected via a network; wherein the computer device is configured to provide one or more virtual machines; wherein upon receiving information on a new virtual machine to be provided in the computer device, a first storage subsystem of the at least one storage subsystem creates a unique virtual port name for the new virtual machine and provides a volume for the new virtual machine, the first storage subsystem including a unique port name for a port through which the volume for the new virtual machine has I/O (Input/Output) connection via the network; wherein the computer device receives the unique virtual port name for the new virtual machine and assigns the unique virtual port name to the new virtual machine under NPIV (N_Port ID Virtualization); and wherein QoS (Quality of Service) setting between the computer device and the first storage subsystem is configured using the unique virtual port name for the new virtual machine.