   <os>
     <type arch="i686">hvm</type>
     <loader type="rom">/usr/lib/xen/boot/hvmloader</loader>
-    <boot dev="hd"/>
   </os>
   <features>
     <acpi/>
@@
       <source file="/dev/default-pool/collidevol1.img"/>
       <target dev="hda" bus="ide"/>
       <address type="drive" controller="0" bus="0" target="0" unit="0"/>
+      <boot order="1"/>
     </disk>
     <controller type="ide" index="0"/>
     <interface type="user">

Domain 'test-collide' defined successfully.
Changes will take effect after the domain is fully powered off.