1. A computer comprising: a memory; and a controller operable to manage a relationship among port information of an initiator port, information of a logical volume storing data from the initiator port, and port information of a target port to be used for storing data from the initiator port to the logical volume, and to cause another computer to process a storage function of a storage system including the logical volume and the target port by creating a virtual machine for executing the storage function on said another computer, and by creating a virtual logical volume on the virtual machine and associating the virtual logical volume on the virtual machine on said another computer with the logical volume in the storage system, said another computer sending the data to the logical volume of the storage system after executing the storage function.