Index: /trunk/src/VBox/Main/xml/Settings.cpp
===================================================================
--- /trunk/src/VBox/Main/xml/Settings.cpp	(revision 35118)
+++ /trunk/src/VBox/Main/xml/Settings.cpp	(revision 35119)
@@ -1042,5 +1042,8 @@
             mdm.hdType == MediumType_MultiAttach ? "MultiAttach" :
             "INVALID";
-        pelmMedium->setAttribute("type", pcszType);
+        // no need to save the usual DVD medium types
+        if (devType != DeviceType_DVD || (   mdm.hdType != MediumType_Normal
+                                          && mdm.hdType != MediumType_Readonly))
+            pelmMedium->setAttribute("type", pcszType);
     }