Patent ID: 8656132

Claim:
A storage system comprising: a computer comprising a first controller; and a storage device coupled to the computer comprising a second controller and one or a plurality of physical storage devices forming a plurality of logical devices, wherein the first controller manages a plurality of first target devices of the computer and at least two files each of which is accessed by different access sources, wherein the second controller manages a plurality of second target devices of the storage device, and wherein the first controller is configured to: in response to receiving an access request indicating one of the at least two files from a respective access source of the different access sources, identify one of the plurality of the first target devices which will be related to the accessed file, detach a file currently allocated to the identified first target device, attach the file indicated in the access request to the identified first target device, and identify one of the plurality of logical devices based on the respective access source of the access request, and send an information indicating the identified one of the plurality of logical devices to the storage device, wherein the second controller is configured to: receive the information indicating the identified one of the plurality of logical devices from the computer, identify one of the second target devices, which is uniquely related to the identified first target device, to which the one of the plurality of logical devices indicated in the information should be exclusively attached, detach a logical device currently allocated to the identified second target device, and attach the identified logical device to the identified second target device, and sends a completion report to the computer.