Hitachi Universal Replicator (TM) for Mainframe User Guide: HP XP24000 Disk Array, HP XP20000 Disk Array (T5278-96044, May 2011)

Figure 19 Shared Universal Replicator for Mainframe Primary Data Volume and ShadowImage
for Mainframe S-VOL and Universal Replicator for Mainframe Secondary Data Volume and
ShadowImage for Mainframe S-VOL
• Universal Replicator for Mainframe/ShadowImage for Mainframe configurations where a
ShadowImage for Mainframe T-VOL in Split status is used as a Universal Replicator for
Mainframe primary data volume
In the following example, the ShadowImage for Mainframe T-VOL in Split status is also
functioning as a Universal Replicator for Mainframe primary data volume. This configuration
allows Universal Replicator for Mainframe to make a remote backup copy of the ShadowImage
for Mainframe T-VOL.
Figure 20 ShadowImage for Mainframe T-VOL in Split Status Functioning as a Universal
Replicator for Mainframe Primary Data Volume
If a failure occurs and the ShadowImage for Mainframe S-VOL is damaged in Figure 20 (page
75), take the following steps to copy data from the Universal Replicator for Mainframe
secondary data volume to the ShadowImage for Mainframe S-VOL so that data can be restored
to the ShadowImage for Mainframe S-VOL:
1. Execute the Business Continuity Manager YKDELETE command on the ShadowImage for
Mainframe pair to release the pair (see Figure 21 (page 76)).
2. Execute the Business Continuity Manager YKSUSPND REVERSE command on the Universal
Replicator for Mainframe pair to suspend the pair. After that, execute the YKRESYNC
REVERSE command to reverse the copy direction and re-establish the pair (see “Restoring
a ShadowImage for Mainframe S-VOL - Step 2” (page 76)).
3. Execute the Business Continuity Manager YKSUSPND FORWARD command on the Universal
Replicator for Mainframe pair to suspend the pair. After that, execute the YKRESYNC
FORWARD command to change the copy direction to the original direction and re-establish
the pair (see “Restoring a ShadowImage for Mainframe S-VOL - Step 3” (page 76)).
4. Execute the Business Continuity Manager YKDELETE command on the Universal Replicator
for Mainframe pair to release the pair (see “Restoring a ShadowImage for Mainframe
S-VOL - Step 4” (page 77)).
5. Execute the Business Continuity Manager YKMAKE command on the ShadowImage for
Mainframe pair to perform copying in the reverse direction (see “Restoring a ShadowImage
for Mainframe S-VOL - Step 5” (page 77)).
Interoperability with Other Products and Functions 75