HP StorageWorks XP Remote Web Console Software - Manual (Page 98)

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 38 Changing into 3DC Multi-target Configuration After Recovering from
Primary Site Failures
Recovering from Failures in the Primary Site (When Delta Resync Operation is Performed)
If a disaster or failure occurs only in the primary site in 3DC multi-target system, you can use secondary
volume in the TCz Synchronous secondary site to enable the secondary site to take over your business
tasks. After transferring your business tasks to the secondary site, you need to remove the failure from the
primary site, so that you will be able to transfer your business tasks back to the primary site.
To transfer your business tasks to the TCz Synchronous 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 TCz
Synchronous pair.
TCz Synchronous pair will be split and the copy operation stops temporarily.
2. Use the TCz Synchronous remote volume to resume your business tasks.
3. Use Business Continuity Manager to execute the YKRESYNC REVERSE command on the TCz
Synchronous pair.
The copy direction of the TCz Synchronous pair will be reversed.
4. In the either cases when the primary/secondary relationship of the TCz Synchronous pair is
not reversed (i.e., the copy direction is not reversed as illustrated in the upper-right picture in
Figure 39 on page 99), or when the primary/secondary relationship of the TCz Synchronous
pair is reversed (i.e., the copy direction is reversed as illustrated in the lower-right picture in
Figure 39 on page 99), use Business Continuity Manager’s YKRESYNC DELTAJNL command to
perform delta resync operation on the volume in the TCz Synchronous secondary site. The status
of the data volumes of URz pair changes as explained in the following table.
98 Preparing for Universal Replicator z/OS Operations