Recovering From Switchover Failure

This section describes procedures to recover from the failure scenario described in the previous section. These procedures bring the application online on the appropriate cluster.

1. Place the Hitachi TrueCopy or Universal Replicator device group, devgroup1, in the SMPL state.

   Use the pairsplit commands to place the device groups that are in the protection group on both cluster-paris and cluster-newyork in the SMPL state. For the pair states that are shown in the previous section, run the following pairsplit commands:

   phys-newyork-1# pairsplit -R -g devgroup1 phys-newyork-1# pairsplit -S -g devgroup1

2. Designate one of the clusters Primary for the protection group.

   Designate the original primary cluster, cluster-paris, Primary for the protection group if you intend to start the application on the original primary cluster. The application uses the current data on the original primary cluster.

   Designate the original secondary cluster, cluster-newyork, Primary for the protection group if you intend to start the application on the original secondary cluster. The application uses the current data on the original secondary cluster.

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   Caution –

   Because the horctakeover command did not perform a swap-takeover, the data volumes on cluster-newyork might not be synchronized with the data volumes on cluster-paris. If you intend to start the application with the same data that appears on the original primary cluster, you must not make the original secondary cluster Primary.

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