HP XP Racks User Manual
Page 78
3.
At the local site, delete the Cnt Ac-S association with the secondary systems (Remove Remote
Connection). In Remote Web Console, connect to each primary system to make sure that all
RCUs are deleted.
4.
At the local and remote sites, change path and port settings.
- If you plan to use the same remote paths:
•
At the local site, change the existing initiator ports to RCU target ports.
•
At the remote site, change the existing RCU target ports to initiator ports.
- To use the same switches, change the operating mode to the opposite direction.
- To use the same extenders, change the operating mode to the opposite direction. The
boxes/nodes connected to the primary system must be set to channel-mode, and the
boxes/nodes connected to the secondary systems must be set to device-mode.
5.
At the remote site, set up the Cnt Ac-S system with the remote site as the primary system, and
the local site as the secondary system.
6.
At the secondary system create the pairs, with the S-VOLs at the local site. Make sure to use
Entire Copy for the Initial Copy Type option. Confirm that the pairs are created and that status
is PAIR.
7.
At the secondary system, halt host operations and vary the P-VOL offline. This maintains
synchronization of the pairs.
8.
At the remote site, split the pairs. Confirm that the pairs are split and status is PSUS before
proceeding. If an error occurs, resolve it before proceeding.
9.
At the secondary system, release the pairs. You do not need to use the Delete Pair by Force
option.
10. At the primary and secondary system, change the path and port settings.
- If you plan to use the same data paths:
•
At the local site, change the existing RCU target ports to initiator ports.
•
At the remote site, change the existing initiator ports to RCU target ports.
- To use the same switches, change the operating mode back to the original direction.
- To use the same channel extenders, change the operating mode back to the original direction.
The boxes/nodes connected to the primary system must be set to channel-mode, and the
boxes/nodes connected to the secondary systems must be set to device-mode.
11. At the local site, perform configuration tasks in preparation for creating the pairs.
12. At the local site, establish consistency groups and create the Continuous Access Synchronous
pairs in the original direction. You may use No Copy for the Initial Copy Type option because
all P-VOLs and S-VOLs are synchronized. If there is any possibility that the volumes are not
100% synchronized, use Entire Copy for Initial Copy Type.
13. Vary the primary system and P-VOLs online, and start host operations.
Procedure 31 To transfer operations back to the local site—if the horctakeover or pairsplit-RS to
the S-VOL command was run when operations were switched to the remote site
1.
At the local site, bring up the host. Make sure that Cnt Ac-S components are operational.
2.
Run the RAID Manager pairresync-swaps to the S-VOL command. If the pair data flow is
already set in the opposite direction and the pair is in PAIR or COPY status, the
pairresync-swaps needs not to be run.
3.
At the secondary system, halt host operations and vary the P-VOL offline. This maintains
synchronization of the pairs.
4.
Run the horctakeover to the P-VOL command.
5.
Vary the primary system and P-VOLs online, and start host operations.
78
Disaster recovery