HP StorageWorks XP Remote Web Console Software - Manual (Page 115)

Chapter 3 Preparing for Universal Replicator z/OS Operations 3-49
Hitachi Universal Replicator for IBM /OS User’s Guide
The copy direction of the TCz Synchronous pair will be reversed.
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.
TCz Synchronous pair will be split and the copy operation stops 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.
The copy direction of the pair will be returned to its original direction.
6. Perform delta resync operation on the volume in the TCz Synchronous
secondary site.
The status of the data volumes of URz pair changes as explained in the
following table.
Table 3-14 Changes of URz Pair Status by Delta Resync Operation (When
Business Tasks are Transferred from TCz Secondary Site to the
Primary Site)
Pair Status before Delta Resync
Operation
Pair Status after Delta Resync Operation URz Pair
Primary Data
Volume
Secondary
Data Volume
Primary Data Volume Secondary Data Volume
URz pair between TCz
Synchronous primary site
and URz secondary site Hold Hold Duplex or Pending
Duplex
Duplex or Pending
Duplex
URz pair between TCz
Synchronous secondary
site and URz secondary
site Duplex or
Suspend Duplex or
Suspend Hold Hold
Caution on transferring business tasks back to the primary site when
using delta resync:
After you remove failures from the primary site and other locations and then
the system is changed to 3DC multi-target configuration, the status of a pair
between the primary site and the URz secondary site may be abnormal. If the
status of the pair remains abnormal, you will be unable to transfer your
business tasks back to the primary site. To solve this problem, please see
Table 3-15, check the pair status and then perform a problem-solving
operation before transferring business tasks back to the primary site.
Table 3-15 Pair Status and Operation after Recovery of the Primary Site
No. If the Status of
the Pair in the
Primary Site is
and the Status of
the Pair in the URz
Secondary Site is
Please Perform the Following Operation before Transferring
Business Tasks Back to the Primary Site