Index: /trunk/src/VBox/Frontends/VirtualBox/src/activity/vmactivity/UIVMActivityMonitor.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/activity/vmactivity/UIVMActivityMonitor.cpp	(revision 92510)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/activity/vmactivity/UIVMActivityMonitor.cpp	(revision 92511)
@@ -1454,6 +1454,4 @@
     diskMetric.setTotal(1, uDiskIOTotalRead);
 
-    diskMetric.addData(0, iWriteRate);
-    diskMetric.addData(1, iReadRate);
     /* Do not set data and maximum if the metric has not been initialized  since we need to initialize totals "(t-1)" first: */
     if (!diskMetric.isInitialized()){
@@ -1461,4 +1459,6 @@
         return;
     }
+    diskMetric.addData(0, iWriteRate);
+    diskMetric.addData(1, iReadRate);
 
     if (m_infoLabels.contains(m_strDiskIOMetricName)  && m_infoLabels[m_strDiskIOMetricName])