Patent ID: 7519745

Claim:
A storage system, coupled to at least one information processing device which is/are logically divided into a plurality of virtualized information processing devices, the storage system being divided into virtual storage systems and receiving data from at least one of the plurality of virtualized information processing devices, the storage system comprising: a plurality of ports arranged to receive the data from the at least one of the plurality of virtualized information processing devices; a plurality of processors which control transfer of the data received by said ports; a plurality of memory resources which store the data based on controlling by said processors; a plurality of RAID (Redundant Array of Independent Disks) groups, each of which relates to a plurality of disk drives, said disk drives storing a plurality of the data and parity data related to the data stored in said disk drives of one of said RAID groups; and a plurality of resource groups, each of said resource groups being divided by at least one logical partition, each resource group having a plurality of kinds of resources including at least one of said ports, at least one of said processors, at least one of said memory resources, and at least one of said RAID groups; wherein each of said resource groups corresponds to at least one of the plurality of virtual storage systems, respectively, and is assigned to at least one of said virtualized information processing devices, respectively, and wherein a quantity of said resources in each of said resource groups is assigned based on a performance required for each of said resource groups assigned to at least one of the virtualized information processing devices, respectively.