       <driver name="qemu" type="qcow2" cache="none"/>
       <source file="/tmp/foobar2"/>
       <target dev="vdc" bus="virtio"/>
-      <shareable/>
       <boot order="1"/>
+      <readonly/>
     </disk>
     <disk type="block" device="disk">
       <source dev="/dev/default-pool/overlay.img"/>

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