I have a Compellent SAN configured with a 20TB CSV that is used for the HA VMs. On top of that I have configured six 5TB LUNs that are assigned to the individual hypervisors (1 each). Sometimes without knowing until it's too late the FCM (Failover Cluster Manager) takes control of one of the non-HA LUNS and assigns it to the current storage owner. This, of course, breaks any VM with resources stored on that LUN.
Is there a way to tell FCM to not take control of a certain disk or LUN from the hypervisors?