Recovering – HP StorageWorks XP Remote Web Console Software User Manual

Page 232

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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 a 3DC multi-target
configuration to a 3DC cascading configuration. Also, the former TrueCopy for Mainframe
Synchronous secondary volume changes to the primary volume.

NOTE:

YKMAKE is a command for establishing a pair.

NOTE:

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 a 3DC multi-target configuration
as explained in

“Changing to 3DC Multi-target Configuration after Recovering from

Primary Site Failures” (page 92)

, and then follow the operation procedure explained in

“Transferring Business Tasks from the TrueCopy for Mainframe Secondary Site to the
Primary Site (in a 3DC Multi-target Configuration)” (page 94)

.

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

“Transferring Business

Tasks from the TrueCopy for Mainframe Secondary Site to the Primary Site (in a 3DC
Cascading Configuration)” (page 93)

.

Figure 89 Recovering from Failures in the Primary Site

Recovering from Failures in the Primary Site (When the Delta Resync
Operation is Performed)

If a disaster or failure occurs only in the primary site in a 3DC multi-target system, use the secondary
volume in the TrueCopy for Mainframe Synchronous 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.

232 Usage Scenarios

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