6.If the YKSUSPND command finishes successfully and the splitting ends successfully, you can resume business tasks (i.e., you can start business applications) by using secondary data volumes in the secondary site. Also, if the primary storage system, the secondary storage system, and remote copy connections are free from failure and fully operational, the restoring of the pair will finish successfully, and then copying of data from the secondary site to the primary site will start.
For detailed information about how to use Business Continuity Manager and about pair status in Business Continuity Manager, please refer to Business Continuity Manager User's Guide.
For detailed information about status of data volumes, refer to section Pair Status.
Transferring Operations Back to the Primary Site
Once the disaster recovery procedure is finished 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 procedure explains how to use Business Continuity Manager to copy data from the secondary site to the primary site:
1.Restore the primary storage system and remote copy connections, and make sure that all URz components are fully operational.
2.At the primary site, locate primary data volumes whose pair status is Pending duplex or Duplex, and then locate corresponding secondary data volumes whose pair status is Suspend, which is equivalent to SWAPPING in Business Continuity Manager terminology. 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 Simplex, and then locate corresponding secondary data volumes whose pair status is Simplex. If such volume pairs are found, issue a request for releasing the pairs to the primary data volumes.
4.At the primary site, locate data volume pairs whose pair status is Simplex, and then use Business Continuity Manager to execute YKRECVER on the secondary data volume (YKRECVER is a command for releasing a pair).
5.Execute the YKRESYNC REVERSE option on secondary data volumes whose pair status is Suspend, which is equivalent to SWAPPING in Business Continuity Manager terminology (YKRESYNC is the Business Continuity Manager command for resynchronizing pair). This reverses primary data volumes and secondary data volumes to resynchronize pairs.
6.Create pairs, specifying secondary data volumes whose pair status is Simplex as primary data volumes. This creates pairs in which primary data volumes and secondary data volumes are reversed.
Chapter 10 Usage Scenarios |
