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Chapter 3 Preparing for Universal Replicator z/OS Operations 3-51
Hitachi Universal Replicator for IBM /OS User’s Guide
R-VOL
Prim. data VOL
Master JNL
VOL
M-VOL
Restore JNL VOL
Sec. data
VOL
Master
JNL VOL
TCz Sync.
UR
M-VOL
Master JNL
VOL
R-VOL
Prim. data
VOL
Restore
JNL VOL
Sec. data
VOL
Master
JNL VOL
TCz Sync.
UR
M-VOL
Prim. data VOL
Master JNL
VOL
R-VOL
Restore JNL VOL
Sec. data
VOL
Master
JNL VOL
TCz Sync.
UR
Black arrow indicates copy direction. If an
arrow is solid, the pair is in Duplex status.
If an arrow is dotted, the pair is in Hold
status.
M-VOL: main volume
R-VOL: remote volume
Prm data VOL: primary data volume
Sec. data VOL: secondary data volume
JNLVOL:
j
ournal volume
primary site
Task s
primary site
primary site
URz
secondary site
TCz Synchronous
secondary site
TCz Synchronous
secondary site
URz
secondary site
TCz Synchronous
secondary site
URz
secondary site
Tasks Tasks
Figure 3-28 Transferring Business Tasks from the TCz Secondary Site to the
Primary Site (When Delta Resync Operation is Performed in
3DC Multi-target Configuration)
Recovering from Failures in the Primary Site and the TCz Synchronous
Secondary Site
If a disaster or failure occurs in both the primary site and the TCz Synchronous
secondary site in a 3DC multi-target configuration, you can resume your
business tasks by using the secondary volume in the URz secondary site. After
you transfer business tasks to the URz secondary site, you need to remove
failures from the primary site and the TCz Synchronous secondary site, so that
you will be able to transfer business tasks back to the primary site.