Patent ID: 8683155

Claim:
A virtualization control apparatus of a storage system, the storage system including a plurality of storage controllers controlling a plurality of storage units connected thereto and a plurality of virtualization switch units being connected to one of the storage controllers, each of the virtualization switch units converting a copy source logical volume address and a copy destination logical volume address contained in a received copy request into addresses of the storage units and making a request to the storage controllers on the basis of the converted addresses, the virtualization control apparatus comprising: a selection unit that, when receiving a copy request, conducting a copy test corresponding to the copy request on each of the virtualization switch units before the copy request is executed, the copy test being a test that repeatedly sends requests for reading a copy source address and a copy destination address contained in the received copy request to the virtualization switch units and compares a smaller one of a number of responses within a predetermined time to a copy source read request and a number of responses within a predetermined time to a copy destination read request sent repeatedly by each virtualization switch unit with each other among the virtualization switch units, and selects one of the virtualization switch units of the highest performance among the plurality of the virtual switch units; and a sending unit that sends the copy request to the selected virtualization switch unit.