Restoring a cluster from the HDR secondary server
You can restore the primary server from the High-availability Data Replication (HDR) secondary server that you prepared to use as a backup server before you migrated or reverted the cluster. After you restore the primary server, you must recreate the other servers in the high-availability cluster.
Before you begin
Prerequisite: You prepared the HDR secondary server to use as a contingency backup server, according to information in Preparing to migrate, upgrade, or revert clusters.
Procedure
To restore a cluster from the HDR secondary server:
- Start the HDR secondary server by running an oninit command.
- Change the secondary server to the primary server by running the onmode -d make primary hdr_server_name command.
- If the server is in quiescent mode, change it to multi-user mode by running an onmode -m command.
- Make a level-0 backup using the ON-Bar or ontape utility.
- Recreate the rest of the high-availability cluster.