Heterogeneous computer system, heterogeneous input/output system and data back-up method for the systems

摘要

A system for storing data including first and second storage systems, each having a disk controller and plural disks under control of the disk controller. The first disk controller receives plural first I/O requests each including a different first disk ID from the other first I/O requests, and determines if the first disk ID indicates one of the second disks. If the first disk ID indicates one of the second disks, the first disk controller obtains an address of the second disk controller and a second disk ID of the second disks, and sends a second I/O request to the second disk controller based on the obtained address and disk ID. Plural second I/O requests, whose target second disk is different from each other based on the different first disk ID, are sent from the first storage system to the second storage system.