       <address type="drive" controller="0" bus="0" target="0" unit="1"/>
     </disk>
     <disk type="file" device="disk">
-      <source file="/tmp/foobar"/>
+      <source file="/dev/null"/>
       <target dev="hda" bus="ide"/>
       <iotune>
         <read_bytes_sec>5242880</read_bytes_sec>

Domain 'test-many-devices' defined successfully.
Changes will take effect after the next domain shutdown.