Hitachi MP-96RD625-01 manual Tasks

		Tasks	TCz Synchronous
	TCz	R-VOL/Prm.	secondary site
	Synchronous	data VOL
			Master
			JNLVOL
M-VOL			URz
Primary site	JNLVOL
			Sec. data VOL
			Restore URz
			JNLVOL secondary site

M-VOL: main volume

R-VOL: remote volume

Prm data VOL: primary data volume

Sec. data VOL: secondary data volume

JNLVOL: journal volume

	Tasks	TCz Synchronous
TCz	M-VOL/Prm	secondary site
Synchronous	.data VOL
		Master
		JNLVOL
R-VOL		URz
Primary site JNLVOL
		Sec. data VOL
	Restore		URz
	JNLVOL		secondary site

Figure 3-25 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 section Recovering from Failures in the Primary Site and the TCz Synchronous Secondary Site and then the system is 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.

3-46 Chapter 3 Preparing for Universal Replicator z/OS Operations

Hitachi Universal Replicator for IBM /OS User’s Guide