Recovering From Primary Site Failures (When Delta Resync Operation Is Performed) - HP XP P9500 User Manual

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 Continuous Access Synchronous Z secondary site.
2. Use Business Continuity Manager to execute the YKSUSPND FORWARD command (a command
for splitting a pair and stopping the copy operation temporarily) to the Continuous Access
Synchronous Z pair.
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 (a command
for re establishing a pair) on the Continuous Access Synchronous Z pair, so that the copy
direction of the Continuous Access Synchronous Z pair is returned to the original state. The
system configuration changes to the original 3DC multi target configuration.
Transferring business tasks from Continuous Access Synchronous Z secondary to primary
site (in 3DC multi target configuration)
If you remove failures from the primary site and other locations and then the system is changed to
3DC multi target configuration, you can transfer your business tasks back to the primary site.
To transfer your business tasks back to the primary site, follow the procedure below. Business
Continuity Manager is used in this procedure:
1. Use Business Continuity Manager to execute the YKDELETE command (a command for releasing
a pair) on the current Continuous Access Journal Z pair, which extends between the Continuous
Access Synchronous Z secondary site and the Continuous Access Journal Z secondary site.
2. Stop business tasks at the Continuous Access Synchronous Z secondary site.
3. Use Business Continuity Manager to execute the YKSUSPND FORWARD command (a command
for splitting a pair and stopping the copy operation temporarily) on the Continuous Access
Synchronous Z pair.
4. Use the main volume in the primary site to resume your business tasks.
5. Use Business Continuity Manager to execute the YKRESYNC FORWARD command (a command
for re establishing a pair) on the Continuous Access Synchronous Z pair, so that the copy
direction of the pair is returned to its original direction.
6. Create a Continuous Access Journal Z pair that consists of a volume in the primary site and
a volume in the Continuous Access Journal Z secondary site. Ensure that the P-VOL of the
resulting pair is the volume in the primary site, and that the S-VOL of the resulting pair is the
volume in the Continuous Access Journal Z secondary site.
To create this pair, use Business Continuity Manager to execute the YKMAKE command (a
command for establishing a pair) on the journal corresponding to that pair.
When the pair is created, the system configuration returns to the original 3DC multi target
configuration.

Recovering from primary site failures (when delta resync operation is performed)

If a disaster or failure occurs only in the primary site of a 3DC multi target system, use secondary
volume in the Continuous Access Synchronous Z secondary site to enable the secondary site to
take over your business tasks. After transferring your business tasks to the secondary site, remove
the failure from the primary site so that you can transfer your business tasks back to the primary
site.
To transfer your business tasks to the Continuous Access Synchronous Z secondary site, follow the
procedure shown next:
Recovery procedures with shared volumes 109