Very important troubleshooting step in case of cluster failure!

Go to command prompt and run following command: “cluster.exe /gen” This command generates cluster log in the following location: c:\windows\cluster\reports\. If command is not ran – no cluster log generated. Earlier this command ran, better chances it will have useful information to troubleshoot: default size of cluster logging is 100M, which is like 24hr of information before it gets overwritten. I highly recommend increasing the cluster log size to maximum possible 1024M (if you can spare 1G C: drive for that). Great article about the subject is here: http://blogs.technet.com/b/askcore/archive/2010/04/13/understanding-the-cluster-debug-log-in-2008.aspx

Symantec Enterprise Vault v9.0.x and Microsoft clustering

Failing over to the second node of Microsoft Cluster does not work if you use Enterprise Vault v.9.0.2. To fix this problem must upgrade to Enterprise Vault v.9.0.3.