Today I've faced another interesting problem. I've added the NFS storage to the ESXi host, then I've added the same storage to the cluster. After a while I've noticed that one of the hosts had 2 storages attached with different names, but pointing to the same NFS target. When I've tried to delete the wrong one, I've got the foloowing error: "The object has already been deleted or has not been completely created". To make the things even more complicated, the virtual machines that were vMotion'ed to that ESXi host in a cluster, somehow changed their datastores to the wrong one (like background Storage vMotion). Thanks God that was testing environment :).
However the solution is very simple:
Just restart the management agents on the ESXi host. This will force the update at the vCenter Server.
