Setup procedure, Disaster recovery in a 3dc cascading configuration – HP StorageWorks XP Remote Web Console Software User Manual
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Setup Procedure
This section explains the procedure for setting up a 3DC cascading configuration using TCz Synchronous
and URz.
To set up a 3DC cascading configuration:
1.
Install TCz Synchronous and URz. Configure ports and journal groups.
2.
Issue a request for creating a TCz Synchronous pair to the primary subsystem MCU where
TCz Synchronous is installed.
3.
Wait until the status of the TCz Synchronous pair becomes Duplex.
4.
Issue a request for creating a URz pair to the MCU where URz is installed.
5.
When creating a URz pair, be sure to select a value from 1 to 3 as the mirror ID.
6.
Wait until the status of the URz pair becomes Duplex.
You must ensure that the TCz Synchronous pair status changes to Duplex before the URz pair status
changes to Duplex. If you have made a request for changing the URz pair status to Duplex before the
TCz Synchronous pair status changes to Duplex, the request will be rejected.
For detailed information about installing and using TCz Synchronous, please refer to Hitachi TrueCopy
for z/OS User’s Guide. For detailed information about URz journal group configuration, see
” on page 31. For detailed information about port configuration, see
Disaster Recovery in a 3DC Cascading Configuration
If a disaster or failure occurs in the primary site in a 3DC cascading configuration, you can use TCz
secondary volumes in the intermediate site to enable the intermediate site to take over your business
tasks. If a disaster or failure occurs in the primary site, first you must transfer your business tasks from the
primary site to the intermediate site.
To transfer your business tasks to the secondary site:
1.
Check consistency of the TCz Synchronous R-VOL in the secondary site.
2.
Use Business Continuity Manager to execute the YKSUSPND REVERSE command onto the copy
groups that will make a TCz Synchronous pair between the primary site and the intermediate site.
3.
Use the TCz Synchronous R-VOL in the intermediate site to resume your business tasks.
4.
Use Business Continuity Manager to execute the YKRESYNC REVERSE command onto the copy
groups that will make a TCz Synchronous pair between the primary site and the intermediate
site. This operation reverses the copy direction.
For detailed information about how to use Business Continuity Manager, please refer to Business
Continuity Manager User’s Guide.
When a disaster or failure occurs, the above procedure enables you to resume your business tasks by
using TCz Synchronous M-VOLs in the intermediate site. The TCz Synchronous M-VOLs in the intermediate
site will contain the same data that are stored in the TCz Synchronous M-VOLs in the primary (main) site.
For detailed information about copy status in Business Continuity Manager, please refer to Business
Continuity Manager User’s Guide.
Transferring Business Tasks Back to the Primary Site
After performing disaster recovery as explained in
Disaster Recovery in a 3DC Cascading Configuration
To transfer business tasks back to the primary site, follow the procedure below. Business Continuity
Manager is used in this procedure:
1.
Stop business tasks at the secondary site.
2.
If the disaster recovery operation (as explained in
Disaster Recovery in a 3DC Cascading Configuration
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Preparing for Universal Replicator z/OS Operations