Patent ID: 8285929

Claim:
A management computer that manages a first storage device that includes a first physical resource that forms a first pool, a first controller that processes an input or output request from a host computer, and a plurality of first ports, and a second storage device that includes a second physical resource that forms a second pool, a second controller, and a plurality of second ports that connect to the plurality of first ports of the first storage device, the management computer comprising: a memory for storing path configuration information that indicates a free capacity for input/output processing of a plurality of paths formed by the plurality of first ports and the plurality of second ports; and a processor that executes a process based on the information stored in the memory, the processor receiving mapping requests for mapping a second logical volume, to which the second physical resource within the second pool is allocated, to a first logical volume that the first controller provides to the host computer, and a path performance request for a path used when transmitting to the second storage device the input or output request to the first logical volume that the first controller has received from the host computer, the processor selecting one or a plurality of paths having an input/output processing free capacity that satisfies a path performance requirement, from among the plurality of paths formed by the plurality of first ports and the plurality of second ports, based on the path configuration information read from the memory, the processor setting priority for the selected one or a plurality of paths, and selecting a path based on the set priority, the processor setting to the host computer use authorization for a primary port that forms the selected path and that is included in the plurality of first ports, a secondary port that forms the selected path and that is included in the plurality of second ports, and the second logical volume, and the processor mapping the second volume to the first volume via the primary port and the secondary port.