HP StorageWorks XP Remote Web Console Software - Manual (Page 96)

6. Specify the TCz Synchronous R-VOL in TCz Synchronous secondary site as the primary data
volume, and specify the secondary data volume in URz secondary site as the secondary data
volume to create the URz pair for delta resync operation.
Select any mirror ID from 1 to 3 except the one used in step 4.
NOTE:
If you delete the TCz Synchronous pair that is created in step 2, the URz pair created in step 6 will be
deleted as well. In addition, if you delete the URz pair created in step 4, the secondary data volume of
the URz pair created in step 6 will be deleted. In this case, you can only perform deleting operation on
the remaining primary data volume.
For detailed information about installing and using TCz Synchronous, please refer to the Hitachi TrueCopy
for z/OS User’s Guide.
For detailed information about URz journal group configuration, see
“ Journal Group Operations ” on page 31. For detailed information about port configuration, see
Configuring Port Attributes on page 112.
Requirements for Creating URz Pair for Delta Resync Operation
To create a URz pair for delta resync operation, the followings are required.
• Create the pair in 3DC multi-target configuration
• Use TCz Synchronous R-VOL in Duplex status as the primary data volume
• Use URz data volume in Duplex status as the secondary data volume
• Use the mirror ID from 1 to 3 that is not used by the secondary data volume
• Fulfill the conditions to combine URz with other functions in Table 21 on page 79
• The system option mode 506 must be set to ON at all site
In addition to the above mentioned requirements, all URz pairs in the journal group must satisfy the
following requirements when you create more than one URz pair for delta resync operation.
• Use the same mirror ID for all pairs
• Use the same restore journal group for all pairs
Requirements for Performing Delta Resync Operation
To perform delta resync operation properly, you need to specify a URz pair that belongs to the journal
group whose URz pairs meet the following requirements. Note that if any URz pair in the journal group
does not meet the requirements, an error occurs even if the specified URz pair meets the requirements.
• Status of the primary data volume is Hold
• Using the volume of TCz Synchronous pair as the primary data volume
If you use TCz Synchronous M-VOL, the pair status should be Duplex. If you use TCz Synchronous
R-VOL, the pair status should be Suspend.
Check the pair status after the Business Continuity Manager YKSUSPEND REVERSE command and
YKRESYNC REVERSE command are executed.
• Secondary data volume uses two mirror IDs; the status of the secondary volume which uses
one of the two mirror IDs is Hold, and the status of the secondary volume which uses another
mirror ID is Duplex or Suspend
• All differential data between the primary and secondary data volume is stored in the master
journal group
Once you have created the URz pair for delta resync operation, or if the failure occurred at the
primary site right after the recovery of TCz Synchronous or URz pair, only a part of the differential
data between the primary and secondary data volume may be stored in the master journal group.
96 Preparing for Universal Replicator z/OS Operations