bug 10504: what is happening is, MS use vdi-copy to create template from volume, then get physical size from XAPI, the physical size might be wrong , SR-SCAN is needed before getting physical size to make XenServer pick the new physical size.

status 10504: resolved fixed

core/src/com/cloud/hypervisor/xen/resource/CitrixResourceBase.java

@@ -5698,7 +5698,8 @@ public abstract class CitrixResourceBase implements ServerResource, HypervisorRe
 
             // copy volume to template SR
             VDI tmpltVDI = cloudVDIcopy(conn, volume, tmpltSR);
-            
+            // scan makes XenServer pick up VDI physicalSize
+            tmpltSR.scan(conn);
             if (userSpecifiedName != null) {
                 tmpltVDI.setNameLabel(conn, userSpecifiedName);
             }