Hitachi MP-96RD625-01 manual VOL/Prm Data VOL Primary site

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

M-VOL: main volume

R-VOL: remote volume

Prm data VOL: primary data volume

Sec. data VOL: secondary data volume

JNLVOL: journal volume

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

Figure 3-26 Transferring Business Tasks from TCz Secondary Site to the Primary Site (in 3DC Cascading Configuration)

Transferring Business Tasks from TCz Secondary Site to the 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 on the current URz pair, which extends between the TCz secondary site and the URz secondary site.

Note: YKDELETE is a command for releasing a pair.

2.Stop business tasks at the TCz Synchronous secondary site.

3.Use Business Continuity Manager to execute the YKSUSPND FORWARD command on the TCz Synchronous pair.

Note: YKSUSPND is a command for splitting a pair and stopping the copy operation temporarily.

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 on the TCz Synchronous pair, so that the copy direction of the pair will be returned to its original direction.

Note: YKRESYNC is a command for re-establishing a pair.

Chapter 3 Preparing for Universal Replicator z/OS Operations	3-47
Hitachi Universal Replicator for IBM /OS User’s Guide