diff --git a/ungleich-infrastructure.dot b/ungleich-infrastructure.dot
index e33dc84..bb5fa97 100644
--- a/ungleich-infrastructure.dot
+++ b/ungleich-infrastructure.dot
@@ -55,6 +55,8 @@ graph G {
 
         # MDarray section
         mdarrayserver2 [ label="MDArray (server2)" ]
+        mdarrayserver3 [ label="MDArray (server3)" ]
+        mdarrayserver4 [ label="MDArray (server4)" ]
         server2p5 -- mdarrayserver2 [ label="via SAS" ]
         server3p5 -- mdarrayserver3 [ label="via SAS" ]
         server4p5 -- mdarrayserver4 [ label="via SAS" ]