Hi, thanks for answering. I've tried to disconnect one host from old vcenter and connect to a new cluster in new vcenter, only this one host in that cluster. I can then use "Mount datastore to additional host". So, hosts are in same site but different clusters. In settings for the NFS datastore I can see all hosts in Connectivity with hosts, they're all R/W. Mounted disk on an additional host and just discovered that I can't create a folder or file there either. That host is also ESXi 6.0 but in other cluster.
I've got a mixed Environment at the moment, two sites, 2 clusters in each, 3 of the 4 clusters are running 6.0, one is on 5.5. One site is Enterprise Plus and Intel and the other is Enterprise license and AMD.
NFS Share is from EMC VNX. Not finding any settings to alter there...