HP XP P9500 Storage - Manual (Page 93)

The following procedure explains how to re-establish control of the Continuous Access Journal
pairs and copy data from the secondary site to the primary site:
Procedure 1
1. Restore the primary system and remote copy connections.
2. Bring up the host server(s) at the primary site.
3. Make sure that all Continuous Access Journal components are operational.
4. Do all of the following, as applicable:
1.
At the primary site, locate P-VOLs whose status is COPY or PAIR. Locate corresponding
S-VOLs at the secondary site whose status is SSWS, which indicates that data is being
written to the S-VOLs. Split these pairs from the primary site.
2. At the primary site, locate P-VOLs whose status is other than SMPL. Locate corresponding
S-VOLs on the secondary site whose status is SMPL. If these pairs are identified, release
the pairs from the primary site.
3. At the primary site, locate pairs whose status is PSUE. At the secondary site, release the
pairs.
5. On pairs that were previously split and in which the S-VOL status is SSWS, execute the
pairresync -swaps command. This reverses P-VOLs and S-VOLs and resynchronizes the pairs.
Copy flow is from disaster recovery site to original primary site.
NOTE: When you execute the pairresync -swaps command, you can use the -d option to
specify a data volume. However, the command is rejected if the restore journal where the
data volume belongs is in Active, Halting or Stopping status.
6. With S-VOLs whose status is SMPL, create pairs specifying the S-VOLs as P-VOLs. This creates
pairs in which P-VOLs and S-VOLs are reversed.
7. Verify that pair status of all new S-VOLs (which were originally P-VOLs) changes from COPY
to PAIR If the pair status is changed to PAIR, initial copy operations are finished and consistency
is maintained.
Data in the secondary site is now reflected on the primary site.
Resume normal operations at the primary site
When Continuous Access Journal volume pairs have been established in the reverse direction, you
are ready to resume normal operations at the primary site. This means moving business operations
back to the local site and re-establishing the original flow of data from local to remote. The following
procedure explains how to resume normal operations at the primary site by using RAID Manager.
1.
At both Continuous Access Journal sites, make sure that Continuous Access Journal components
are operational and free of failures.
2. Make sure that pair status of P-VOLs and S-VOLs in all Continuous Access Journal pairs is
PAIR.
3. Stop the applications at the secondary site.
4. Issue a request for splitting pairs to master journals (originally restore journals on the remote
site); use the Flush option when splitting pairs. If an error occurs when splitting pairs, remove
the error cause and go back to step 1 after resuming your business task at the secondary site.
5. If no errors occur, wait until suspension finishes. After suspension finishes, check whether there
is an S-VOL on the local site whose status is other than PSUS. If such a pair exists, remove the
error cause and go back to step 1 after resuming your business task at the secondary site.
6. When all S-VOLs at the primary site are PSUS status, data in P-VOLs and S-VOLs are the same.
S-VOLs at the primary site are ready for host read/write activity. Resume applications at the
primary site.
Resume normal operations at the primary site 93