When ESXi hosts use different security mechanisms to mount the same NFS 4.1 datastore, virtual machine failures might occur If different ESXi hosts mount the same NFS 4.1 datastore using different security mechanisms, AUTH_SYS and Kerberos, virtual machines placed on this datastore might experience problems and failure. For example, your attempts to migrate the virtual machines from host1 to host2 might fail with permission denied errors.