HP StorageWorks XP Remote Web Console Software - Manual (Page 100)

• If pair re-synchronization has not been performed to reverse the primary volume and the remote
volume of the TCz Synchronous pair (i.e., if the pair is suspended), use Business Continuity
Manager to execute the YKRESYNC command, so that the copy direction of the TCz Synchronous
pair will be reversed.
M-VOL
JNLVOL
Restore
JNLVOL
URz
Master
JNLVOL
R-VOL
JNLVOL
Restore
JNLVOL
URz
Master
JNLVOL
業務 Tasks 業務 Tasks
TCz
Synchronous TCz
Synchronous
TCz Synchronous
secondary site TCz Synchronous
secondary site
URz
secondary site URz
secondary site
Primary site Primary site
R-VOL/Prm.
data VOL M-VOL/Prm
.data VOL
Sec. data VOL Sec. data VOL
M-VOL: main volume
R-VOL: remote volume
Prm data VOL: primary data volume
Sec. data VOL: secondary data volume
JNLVOL: journal volume
Figure 40 Changing into 3DC Multi-target Configuration After Recovering from
Primary Site Failures
Transferring Business Tasks from TCz Secondary Site to the Primary Site (in 3DC Cascading
Configuration)
If you follow the operation procedure in
“ Recovering from Failures in the Primary Site and the TCz Synchronous Secondary Site ” on page 104 the
system will be changed to 3DC cascading configuration, you can transfer your business tasks back to the
primary site after removing failures from the primary site and other locations.
To transfer your business tasks back to the primary site, follow the procedure below. Business Continuity
Manager is used in this procedure:
1. Stop business tasks at the TCz Synchronous secondary site.
2. Use Business Continuity Manager to execute the YKSUSPND FORWARD command to the TCz
Synchronous pair.
NOTE:
YKSUSPND is a command for splitting a pair and stopping the copy operation temporarily.
3. Use the primary volume in the primary site to resume your business tasks.
4. Use Business Continuity Manager to execute the YKRESYNC FORWARD command on the TCz
Synchronous pair, so that the copy direction of the TCz Synchronous pair will be returned to the
original state. The system configuration changes to the original 3DC multi-target configuration.
NOTE:
YKRESYNC is a command for re-establishing a pair.
100 Preparing for Universal Replicator z/OS Operations