In an environment where the Windchill RV&S server is using a shared file system to provide failover support, each HotFix should be installed once. You should install the HotFix first on the secondary node in the cluster, then after failing over to that node, install the HotFix on the primary node. For more information on the Windchill RV&S server in a failover environment, see the Windchill RV&S Server Failover Configuration documentation.