| 摘要 |
PROBLEM TO BE SOLVED: To restore data in one storage device system even when data of the other storage device system is damaged in the case of performing remote copy in an order non-guaranteed system. SOLUTION: This data copy system has a step 1 for inspecting consistency at the time when writing of the data from a host computer to a main logical volume of a main storage device system is completed, a step 2 for creating a snapshot recording a state of the main logical volume at the time when the consistency is assured and a step 3 for executing remote copy between the main storage device system and sub storage device system using the snapshot. The step 3 has a step 4 for transferring data indicating a state of the main logical volume of the main storage device system to the sub storage device system, a step 5 for creating the snapshot recording the state of the logical volume of the sub storage device system before execution of the remote copy and a step 6 for applying the data transferred in the step 4 to the logical volume of the sub storage device system. COPYRIGHT: (C)2006,JPO&NCIPI
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