Patent ID: 7370229

Claim:
A storage system comprising at least one host computer, at least one storage device for providing a memory device to said host computer, and a management computer for managing said storage device, wherein said management computer comprises: means for acquiring in advance from said host computer storage configuration information that said host computer has and in which is stored information relating to where a first host computer of a primary volume is located and which of a plurality of volumes of said at least one host computer is configured with the primary volume as a copy pair; and change notification means for generating change information for changing said storage configuration information that was acquired in advance and posting it to said host computer; and said host computer executing one or more application programs which use data that is stored in said volumes of the host computer; said host computer comprises means for instructing a change of configuration to said storage device based on said change information posted from said management computer, wherein said management computer generates a configuration setup file in response to change information which identifies a first copy pair and sends said configuration setup file to said at least one host computer, wherein said management computer, subsequent to transmitting said configuration setup file, instructs said at least one host computer to establish said first copy pair, wherein said at lease one host computer, after receiving said instruction to establish said first copy pair, instructs said storage device to commence copying data from one of the volumes of said at least one host computer identified in said configuration setup file to a secondary logical volume of another host computer identified in said configuration setup file, wherein said management computer, subsequent to receiving a copying-complete report from said at least one host computer, requests configuration information from inside said storage device and updates said storage configuration information based on said configuration information received in response to said request.