This is first time setting up Commvault for Windows cluster support so here it goes. I have installed both the Idata agent for Windows on both physical nodes of the cluster. On both those nodes I have it backing up the physical drives of those two servers and on both have the backup system state selected (C:S:T: respectively). I had purchased the Virtual File System Idata agent and installed it on Virtual Server Active node and its passive node. I have backup schedule for the Virtual box that backs up its shared disk. The question I have is the Quorrum disk. Do I back this up on the physical client or as I am doing it now throught the Virtual server? The way I understand it that is really important data for the clustering operation and backs up during the System State backup which both my Physical nodes are set to do.