Patent ID: 6912632

Claim:
A method of controlling a storage system, said storage system including a host computer, and a storage control device that is connected to said host computer to be able to communicate therewith and that is for inputting/outputting data to/from a storage device based on a data input/output request sent from said host computer; said storage control device performing: a first control for managing a storage area in said storage device using a logical volume that is a logical storage area created on said storage area and storing, in said logical volume, management information that enables an operating system running on said host computer to manage said logical volume; a second control for controlling duplication of data in a first logical volume also to be stored on a real-time basis in a second logical volume that is different from said first logical volume; and a third control for making a logical volume identifier and a data set identifier for said first logical volume that are described in the management information in said first logical volume and a logical volume identifier and a data set identifier for said second logical volume that are described in the management information in said second logical volume match each other while said real-time duplication is being performed; said method comprising: said storage system generating a control program for performing a process for setting said logical volume identifier and said data set identifier for said first logical volume, which are described in said management information in said first logical volume, and said logical volume identifier and said data set identifier for said second logical volume, which are described in said management information in said second logical volume, to be different from each other; and said storage system interrupting said duplication and then executing said control program.