HP StorageWorks XP Remote Web Console Software - Manual (Page 282)

10-10 Chapter 10 Usage Scenarios
Hitachi Universal Replicator for IBM /OS User’s Guide
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).