Recovering From Switchover Failure

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

1. Put the Hitachi TrueCopy device group, devgroup1, in the SMPL state.

   Use the pairsplit commands to put the device groups that are in the protection group on bothcluster-paris and cluster-newyork in the SMPL state. For the pair states shown in the previous section, the following pairsplit commands should be issued:

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

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

   Make the original primary cluster, cluster-paris, Primary for the protection group if you intend to bring up the application on the original primary cluster. The application will use the current data on the original primary cluster.

   Make the original secondary cluster, cluster-newyork, Primary for the protection group if you intend to bring up the application on the original secondary cluster. The application will use 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 may not be synchronized with the data volumes on cluster-paris. If you intent to bring up the application with the same data as appears on the original primary cluster, you must not make the original secondary cluster Primary.

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