I've been using Storage Response Time monitor for serveral months for two ESX hosts and have been very pleased with the info it provides. A couple of days ago I added another ESX host. The new host shows "no VMs are running for this connection" for on of the NFS datastores connected to it. Another NFS datastore does not show up at all. I do see VMs listed under a local datastore on that host. I have VMs on that host residing on both the NFS datastores I mentioned.