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Chapter 3 Preparing for Universal Replicator z/OS Operations 3-45
Hitachi Universal Replicator for IBM /OS User’s Guide
Note: By specifying an option, you can copy the whole data in the primary
volume to the secondary volume and avoid the error when only a part of the
differential data between primary and secondary data volume is stored in the
journal volume. For detailed information about the option, see section
Changing Options for a Journal Group.
Changing to 3DC Multi-target Configuration after Recovering from
Primary Site Failures
If you follow the operation procedure in section Recovering from Failures in the
Primary Site and the TCz Synchronous Secondary Site and then the system
does not change to 3DC cascading configuration, you can change the system
into 3DC multi-target configuration after removing failures from the primary
site and other locations, The resulting 3DC multi-target system uses the
former TCz secondary volume as a primary volume.
To change the system into 3DC multi-target configuration:
1. Use Business Continuity Manager to execute the YKDELETE command on
the journal group corresponding to the former URz pair.
Note: YKDELETE is a command for releasing a pair.
2. If pair resynchronization has not been performed to reverse the primary
volume and the remote volume of the TCz Synchronous pair (i.e., if the
pair is suspended), use Business Continuity Manager to execute the
YKRESYNC command, so that the copy direction of the TCz Synchronous
pair will be reversed.
Note: YKRESYNC is a command for re-establishing a pair.