Hitachi MP-96RD625-01 manual Usage Scenarios

Note: YKRECVER is a command that requests releasing of a pair to the secondary data volume.

2.Use Business Continuity Manager to execute the YKSUSPND REVERSE command on the TCz Synchronous pair.

Note: YKSUSPND is a command for splitting a pair and stopping the copy operation temporarily.

3.Use the TCz Synchronous remote volume to resume your business tasks.

4.Use Business Continuity Manager to execute the YKRESYNC REVERSE command on the TCz Synchronous pair, in order to reverse the copy direction of the TCz pair.

Note: YKRESYNC is a command for re-establishing a pair.

a)If reversing of the copy direction fails (as illustrated in the upper-right picture in Figure 10-2), create a URz pair. Ensure that the primary data volume of the pair is a volume in the TCz Synchronous secondary site, and that the secondary data volume of the pair is a volume in URz secondary site. To create this URz pair, use Business Continuity Manager to execute YKMAKE command on the journal group corresponding to the pair.

b)If reversing of the copy direction ends successfully (as illustrated in the lower-right picture in Figure 10-2), re-create the URz pair that was released in step 1 of this procedure. To re-create this pair, use Business Continuity Manager to execute YKMAKE command on the journal group corresponding to the pair.

After the pair is re-created, the system configuration changes from 3DC multi-target configuration to 3DC cascading configuration. Also, the former TCz Synchronous secondary volume changes to the primary volume.

Note: YKMAKE is a command for establishing a pair.

Notes:

–If you followed the instruction in step (a) above and you want to transfer your business tasks back to the primary site, you need to remove failures from the primary site and other locations. After that, you need to change the system into 3DC multi-target configuration as explained in section Changing to 3DC Multi-target Configuration after Recovering from Primary Site Failures, and then follow the operation procedure explained in section Transferring Business Tasks from TCz Secondary Site to the Primary Site (in 3DC Multi-target Configuration)

–If you followed the instruction in step (b) above and you want to transfer your business tasks back to the primary site, you need to remove failures from the primary site and other locations, and then follow the operation procedure explained in section Transferring Business Tasks from TCz Secondary Site to the Primary Site (in 3DC Cascading Configuration).

10-10 Chapter 10 Usage Scenarios

Hitachi Universal Replicator for IBM /OS User’s Guide