Hp XP Continuous Access Software Manuel d'utilisateur télécharger pdf (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 dis

aster recovery procedure ﬁnishes and your business applications are running at the

secondary si

te, the next activity is to restore the primary site and make arrangements for copying data

from the sec

ondary site back to the primary site. The following procedures explains how to use RAID

Manager XP t

o 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

correspon

ding secondary data volumes whose pair status is SSWS. If such volume pairs are found,

issue a re

quest 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

deleti

ng 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.

CAUTIO

When ex

ecuting the pairresync -swaps command, use the

-d

option to specify a data

volum

e. 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

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Disaster recovery operations

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