It may be necessary to modify the cluster configuration. For example, it may be necessary to correct heartbeat channel or quorum partition entries in the cluster database, a copy of which is located in the /etc/cluster.xml file.
Use only the Cluster Configuration Tool to modify the cluster configuration. Do not directly edit the /etc/cluster.xml file with a text editor.
To modify the cluster configuration, stop the cluster software on all cluster systems, as described in Section 8.3 Starting and Stopping the Cluster Software. Start the Cluster Configuration Tool and modify the fields that you need to change. Choose File => Save to save your changes. Settings automatically transfer via shared storage to active cluster members.