HP StorageWorks XP Remote Web Console Software - Manual (Page 104)

R-VOL
Prim. data VOL
Master JNL
VOL
M-VOL
Restore JNL VOL
Sec. data
VOL
Master
JNL VOL
TCz Sync.
UR
M-VOL
Master JNL
VOL
R-VOL
Prim. data
VOL
Restore
JNL VOL
Sec. data
VOL
Master
JNL VOL
TCz Sync.
UR
M-VOL
Prim. data VOL
Master JNL
VOL
R-VOL
Restore JNL VOL
Sec. data
VOL
Master
JNL VOL
TCz Sync.
UR
Black arrow indicates copy direction. If an
arrow is solid, the pair is in Duplex status.
If an arrow is dotted, the pair is in Hold
status.
M-VOL: main volume
R-VOL: remote volume
Prm data VOL: primary data volume
Sec. data VOL: secondary data volume
JNLVOL: journal volume
primary site
Tasks
primary site primary site
URz
secondary site
TCz Synchronous
secondary site
TCz Synchronous
secondary site
URz
secondary site
TCz Synchronous
secondary site
URz
secondary site
Tasks Tasks
Figure 43 Transferring Business Tasks from the TCz Secondary Site to the Primary Site
(When Delta Resync Operation is Performed in 3DC Multi-target Configuration)
Recovering from Failures in the Primary Site and the TCz Synchronous Secondary Site
If a disaster or failure occurs in both the primary site and the TCz Synchronous secondary site in a 3DC
multi-target configuration, you can resume your business tasks by using the secondary volume in the URz
secondary site. After you transfer business tasks to the URz secondary site, you need to remove failures
from the primary site and the TCz Synchronous secondary site, so that you will be able to transfer
business tasks back to the primary site.
To transfer your business tasks to the URz secondary site, follow the procedure below. Business Continuity
Manager is used in this procedure:
1. Use Business Continuity Manager to execute the YKSUSPND REVERSE command on the journal
group corresponding to the URz pair, which extends between the primary site and the URz
secondary site.
NOTE:
YKSUSPND is a command for splitting a pair and stopping the copy operation temporarily.
2. Use volumes in the URz primary site to resume your business tasks.
104 Preparing for Universal Replicator z/OS Operations