CONTROL METHOD FOR STORAGE SYSTEM, STORAGE SYSTEM, STORAGE CONTROL DEVICE, CONTROL PROGRAM FOR STORAGE SYSTEM, AND INFORMATION PROCESSING SYSTEM

摘要

PROBLEM TO BE SOLVED: To switch to a continued operation using backup data without delay upon a failure in a storage device in a storage system for holding data in a plurality of storage devices by replication. SOLUTION: The storage system 20 has a backup disk 32 kept equivalent in storage content to a user disk 31 accessed by a host computer 10. When a failure is detected in the user disk 31, whether the user disk 31 and the backup disk 32 are equivalent in storage content is checked, and if they are equivalent, internal identification information about the user disk 31 is changed to the value of the backup disk 32 to automatically switch the access destination to the backup disk 32 without causing the host computer 10 to be aware of the substitution. COPYRIGHT: (C)2006,JPO&NCIPI