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10-6 Chapter 10 Usage Scenarios
Hitachi Universal Replicator for IBM /OS User’s Guide
7. Verify that pair status of all secondary data volumes (which were originally
primary data volumes) changes from Pending Duplex to Duplex. If the
pair status is changed to Duplex, initial copy operations are finished and
consistency is maintained.
The above procedure enables copying of data from the secondary site to the
primary site. Data in the secondary site will be reflected on the primary site.
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.
Resuming Normal Operations at the Primary Site
Once the URz volume pairs have been established in the reverse direction, you
are ready to resume normal operations at the primary site. The following
procedure explains how to resume normal operations at the primary site by
using Business Continuity Manager. Remember that the URz terminology is
now reversed: the original primary data volumes are now secondary data
volumes, and the original secondary data volumes are now primary data
volumes.
1. At the primary and secondary sites, make sure that all URz components are
fully operational and are free from failures.
2. Make sure that pair status of primary and secondary data volumes in all
URz pairs is "Duplex". This indicates that the URz initial copy operations
are complete and consistency is maintained.
3. Stop the applications at the secondary site.
4. Issue a request for splitting pairs to master journal groups (which were
originally restore journal groups); please use the Business Continuity
Manager to execute the YKSUSPND FLUSH SVOL PERMIT option on the
master journal group (which was originally the restore journal group);
YKSUSPND is a command for splitting pairs. If an error occurs when
splitting pairs, please remove the error cause and go back to step 1 after
resuming your business task at the secondary site.
5. If no error occurs in step 4, wait until suspension finishes. After suspension
finishes, check whether there is a secondary data volume (which is
originally a primary data volume) whose pair status is other than Suspend
(equivalent to SUSPOP with Business Continuity Manager). If such a pair
exists, please remove the error cause and go back to step 1 after resuming
your business task at the secondary site.