HP StorageWorks XP Remote Web Console Software - Manual (Page 43)

NOTE:
The URz pair needs to be in Hold status to form the delta resync operation when the failure occurs.
However, the URz pair status may be changed to Hlde for example when the cache memory or shared
memory error occurs in TCz Synchronous secondary site, or when no journal cannot be obtained in TCz
Synchronous secondary site because of the failure in the master journal volume or occurrence of the
pinned track. If the status of the URz pair for delta resync operation changes to Hlde, follow the steps in
“ Restoring a Pair of Data Volumes ” on page 165 and change the pair status to Hold again.
Switching the Master Journal Group of URz
When a failure occurs on the primary site in Figure 7 on page 42 (3DC multi-target configuration), the
URz pair for delta resync operation can use the journal group in TCz Synchronous secondary site as the
master journal group. To switch the master journal group, first change TCz Synchronous secondary site to
the primary site by using Business Continuity Manager, then perform the delta resync operation on the
primary data volume of the URz pair in Hold status. The following figure shows an example.
Hitachi Universal Replicator for z/OS user guide for XP12000/XP10000 Disk Arrays and SVS 200 43