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3-28 Chapter 3 Preparing for Universal Replicator z/OS Operations
Hitachi Universal Replicator for IBM /OS User’s Guide
Figure 3-10 combines the configurations shown in Figure 3-8 and Figure
3-9. Within a single URz pair, the primary data volume and secondary data
volume are both functioning as SIz S-VOLs, providing multiple copies at
the primary and secondary sites.
URz
SIz
MCU
RCU
SIz
T-VOL
Master journal
volume
T-VOL
Secondary
data volume
Primary data
volume
S-VOL
Restore
j
ournal volume
S-VOL
Figure 3-10 Shared URz primary data volume and SIz S-VOL, and URz
secondary data volume and SIz S-VOL
• URz/SIz configuration where a SIz T-VOL in Split status is used as
a URz primary data volume
In the following example, the SIz T-VOL in Split status is also functioning
as a URz primary data volume. This configuration allows URz to make a
remote backup copy of the SIz T-VOL.
URz
SIz
S-VOL in
Split status
T-VOL in
Split status
Primary data
volume
Secondary
data volume
Master journal
volume
Restore journal
volume
MCU
RCU
Figure 3-11 SIz T-VOL in Split Status Functioning as URz Primary
Data Volume
If a failure occurs and the SIz S-VOL is damaged in Figure 3-11, take the
following steps to copy data from the URz secondary data volume to the
SIz S-VOL so that data can be restored to the SIz S-VOL:
1. Execute the Business Continuity Manager YKDELETE command on the SIz
pair to release the pair (see
Figure 3-12).
2. Execute the Business Continuity Manager YKSUSPND REVERSE command
on the URz pair to suspend the pair. After that, execute the YKRESYNC
REVERSE command to reverse the copy direction and re-establish the pair
(see
Figure 3-13).