HP XP Continuous Access Software - Manual (Page 182)

secondary data volumes and splits journal groups that will become a Continuous Access XP Journal pair.
This ensures consistency of secondary data volumes and makes the secondary data volumes usable. If
possible, the horctakeover command attempts to restore pairs to reverse primary and secondary data
volumes. If the horctakeover command executes successfully, your business tasks will be taken over to (or
your business application will be started at) the secondary site, using secondary data volumes. For more
information about using RAID Manager XP, see the HP StorageWorks RAID Manager XP user guide.
Transferring operations back to the primary site
After the disaster recovery procedure finishes and your business applications are running at the
secondary site, the next activity is to restore the primary site and make arrangements for copying data
from the secondary site back to the primary site. The following procedures explains how to use RAID
Manager XP to copy data from the secondary site to the primary site.
1. Restore the primary array and remote copy connections, bring up the host servers at the primary site,
and ensure that all Continuous Access XP Journal components are fully operational.
2. At the primary site, locate primary data volumes whose pair status is COPY or PAIR, and locate the
corresponding secondary data volumes whose pair status is SSWS. If such volume pairs are found,
issue a request for splitting the pairs to the primary data volumes.
3. At the primary site, locate primary data volumes whose pair status is not SMPL, and locate the
corresponding secondary data volumes whose pair status is SMPL. If such volume pairs are found,
issue a request for deleting the pairs to the primary data volumes.
4. At the primary site, locate data volume pairs whose pair status is SMPL, and issue a request for
deleting the pairs to the secondary data volumes.
5. Execute the pairresync -swaps command on secondary data volumes whose pair status is SSWS
(pairresync is the RAID Manager XP command for resynchronizing pair and -swaps is a swap
option). This reverses primary and secondary data volumes to resynchronize pairs.
CAUTION:
When executing the pairresync -swaps command, use the -d option to specify a data
volume. However, if the restore journal group where the data volume belongs is in
Active, Halting, or Stopping status, the pairresync -swaps command is rejected. For
more information about journal group status, see Displaying detailed information about
journal groups
6. Create pairs, specifying secondary data volumes whose pair status is SMPL as primary data volumes.
This creates pairs in which primary and secondary data volumes are reversed.
7. Verify that pair status of all secondary data volumes (which were originally primary data volumes)
changes from COPY to PAIR. If the pair status is changed to PAIR, initial copy operations are finished
and consistency is maintained.
This procedure enables copying of data from the secondary site to the primary site. Data in the
secondary site is applied on the primary site.
For more information about using RAID Manager XP, see the HP StorageWorks RAID Manager XP
user guide.
For more information about status of data volumes, see
Continuous Access XP Journal data volume
pair status .
Resuming normal operations at the primary site
After the Continuous Access XP Journal volume pairs have been established in the reverse direction, you
are ready to resume normal operations at the primary site. The following procedure explains how to
use RAID Manager XP to resume normal operations at the primary site. Remember that the Continuous
182 Disaster recovery operations