diff -uNr a/heartbeat/Filesystem b/heartbeat/Filesystem

--- a/heartbeat/Filesystem	2016-12-20 14:16:29.439700386 +0100

+++ b/heartbeat/Filesystem	2016-12-20 14:18:04.954623779 +0100

@@ -538,6 +538,12 @@

 		Filesystem_notify

 	fi

+	# Check if there are any mounts mounted under the mountpoint

+	if list_mounts | grep -q -E " $MOUNTPOINT/\w+" >/dev/null 2>&1; then

+		ocf_log err "There is one or more mounts mounted under $MOUNTPOINT."

+		return $OCF_ERR_CONFIGURED

+	fi

+

 	# See if the device is already mounted.

 	if Filesystem_status >/dev/null 2>&1 ; then

 		ocf_log info "Filesystem $MOUNTPOINT is already mounted."