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

摘要

A storage system (10) comprises a first disk controller (104) coupled to a host computer (101) and at least one first disk (105) coupled to said first disk controller (104). The storage system (10) is coupled to another storage system (20), which comprises a second disk controller (113) and at least one second disk (114). The first disk controller (104) receives a write request issued from said host computer (101), selects a storage system including a target disk corresponding to first disk identification information included in said write request, obtains, if the selected storage system is said another storage system (20), identification information designating said another storage system (20) and second disk identification information designating one of said at least one second disk based on said first disk identification information, and sends a write request to said another storage system (20) according to said identification information designating said another storage system (20) and said second disk identification information.