| 摘要 |
PROBLEM TO BE SOLVED: To provide a remote copy system for securing the time sequentiality of data to be dealt by a remote site even when a task in a remote site is operated across a plurality of storages or a plurality of volume groups. SOLUTION: A consistency group 90 composed of a sub-journal volume 82 and a replica is associated with a journal group 92 composed of a primary data volume 80, a primary journal volume 84, a sub-journal volume 86 and a sub-data volume 82. In backing up the sub-data volume to form the replica, a host 20 issues a backup time reservation command to a storage device 12, and the storage device 12 contrasts a time stamp added to the journal data with a backup reservation time to prepare the replica. COPYRIGHT: (C)2008,JPO&INPIT
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