7.4.3 Disaster event and recovery

7.4.3 Disaster event and recovery

In the event of a disaster which makes Server 1 unavailable, the following sequence of events will occur:

All other DR tasks will be carried out on relevant required services. For instance, DR databases will be brought up, DR legacy systems will be failed over, and so on.

The running LPARs on Server 2 will be shut down in a controlled fashion.

The disaster recovery LPARs will be started in a controlled fashion, in the correct order.

After the failover, Server 2 runs all production systems on their respective backup LPARs. After Server 1 is repaired, the systems can be migrated back at a convenient time with a scheduled outage.

Figure 7-6 The two systems after disaster recovery