HP XP Continuous Access Software - Manual (Page 76)

• Local array at the primary site
• Continuous Access XP Synchronous installed
• Continuous Access XP Synchronous P-VOL
• Local array at the Intermediate site
• Continuous Access XP Synchronous installed
• Continuous Access XP Journal installed
• Volume used as a Continuous Access XP (synchronous) S-VOL and a Continuous Access
XP Journal primary data volume
• Continuous Access XP Journal master journal volume
• Local array at the remote site
• Continuous Access XP Journal installed
• Continuous Access XP Journal secondary data volume
• Continuous Access XP Journal restore journal volume
Setup procedure
This section explains the procedure for setting up a 3DC cascading configuration using Continuous
Access XP Synchronous and Continuous Access XP Journal.
1. Install Continuous Access XP Synchronous and Continuous Access XP Journal. Configure ports
and journal groups.
2. Issue a request for creating a Continuous Access XP Synchronous pair to the primary array where
Continuous Access XP Synchronous is installed.
3. Wait until the status of the Continuous Access XP Synchronous pair becomes PAIR.
4. Issue a request for creating a Continuous Access XP Journal pair to the Continuous Access XP
Journal primary array.
When creating a Continuous Access XP Journal pair, ensure that you select a value from 1 to 3
as the mirror ID.
5. Wait until the status of the Continuous Access XP Journal pair becomes PAIR.
NOTE:
You must ensure that the Continuous Access XP Synchronous pair status changes to PAIR before the
Continuous Access XP Journal pair status changes to PAIR. If you made a request to a change the
Continuous Access XP Journal pair status to PAIR before the Continuous Access XP Synchronous pair
status changes to PAIR, the request is rejected.
For more information about installing and using Continuous Access XP Synchronous, see the
HP StorageWorks Continuous Access XP user guide for the XP12000/XP10000/SVS200. For more
information about Continuous Access XP Journal journal group configuration, see Journal group
operations . For more information about port configuration, see Configuring port attributes .
Disaster recovery
If a disaster or failure occurs in the primary site in a 3DC cascading configuration, you can use
Continuous Access XP Synchronous 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, you must first
transfer your business tasks from the primary site to the intermediate site.
To transfer your business tasks to the secondary site:
1. Check the consistency of the Continuous Access XP Synchronous S-VOL in the intermediate site.
2. Use RAID Manager XP to execute the horctakeover command on the Continuous Access XP
Synchronous pair that exists between the primary and intermediate sites.
76 Continuous Access XP Journal operations requirements and restrictions