CONTROL METHOD FOR STORAGE DEVICE CONTROLLER AND STORAGE DEVICE CONTROLLER AND PROGRAM

PROBLEM TO BE SOLVED: To provide the control method of a storage device controller connected to a storage device having a plurality of storage volumes for storing data and an information processor for making the input/output request of data for receiving the input/output request from the information processor, and for executing the input/output processing of data for the storage volumes, and to execute reproduction management while maintaining the consistency of data. SOLUTION: A certain storage volume is made correspond to the other storage volume in which the reproduction of data is written when the data are written in the certain volume, and a pair group is configured of a plurality pairs which are respectively constituted of the certain volume and the other storage volume. The release of the correspondence of the respective pairs configuring the pair group is started, and whether or not the input/output request from the information processor has been issued after the start of the release of the correspondence is decided, and when it is decided that the input/output request has been issued after the start of the release of correspondence, the release of correspondence is executed, and then the input/output processing is executed. COPYRIGHT: (C)2004,JPO&NCIPI