6.If there is no secondary data volume (which is originally a primary data volume) whose pair status is other than Suspend (equivalent to SUSPOP with Business Continuity Manager), data in primary data volumes are the same as data in secondary data volumes, and the secondary data volume (which are originally primary data volumes) are usable. Please resume applications at the primary site.
7.Execute the YKSUSPND REVERSE command on the restore journal group (which were originally master journal group); YKSUSPND is a Business Continuity Manager command and REVERSE is an option. Wait until suspension completes.
8.After suspension completes, execute the Business Continuity Manager YKRESYNC REVERSE command on the restore journal group (which were originally master journal group). This reverses primary data volumes and secondary data volumes to resynchronize pairs and restores copy direction to its original direction..
For detailed information about how to use Business Continuity Manager, please refer to Business Continuity Manager User's Guide.
For detailed information about status of data volumes, refer to section Pair Status.
Disaster Recovery for Multiple Primary and Secondary Storage Systems
Consistency of Data Update Sequence When a Disaster Occurs
When a failure occurs in some primary or secondary storage system, all journal groups in the extended consistency group will be suspended and remote copy operations will be suspended. The consistency of data update sequence will be maintained if a failure occurs in a primary storage system, but the consistency will not be maintained if a failure occurs in a secondary storage system.
For example, in the case described in Figure
Chapter 10 Usage Scenarios |
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