Appendix I. GDPS Virtual Appliance 549
I.3.3 Disaster recovery
In a site disaster, GDPS Appliance will immediately issue a freeze for all applicable primary
devices. This action is taken to protect the integrity of the secondary data. The GDPS cluster
then resets Site 1 and Site 2 systems and updates all the IPL information to point to the
secondary devices, and IPLs all the production systems in the LPARs in Site 2 again. The
GDPS Appliance scripting capability is key to recovering the systems in the shortest possible
time following a disaster. All recovery operations are carried out without operator intervention.
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