DATA MIGRATION METHOD, COMPUTER SYSTEM, AND DATA MIGRATION PROGRAM

PROBLEM TO BE SOLVED: To cancel an executed migration by a simple operation after completion of the migration. SOLUTION: This computer system accepts selection of a move origin volume and a move destination volume of the executed migration and determines whether or not the selected move origin volume and move destination volume have been updated after completion of the executed migration based on the completion time and date of the executed migration and the update time and date of the volumes, and when it is determined that neither the move origin volume nor move destination volume has been updated, the system sets a storage subsystem so that a host computer may access the move origin volume and thereby the system cancels the executed migration. COPYRIGHT: (C)2009,JPO&INPIT