<dd style="margin-left:2em;margin-right:2em;margin-bottom:0.5em;color:rgb(0,0,0);font-family:Verdana,Arial,Helvetica,sans-serif;font-size:13px">hi,all </dd><dd style="margin-left:2em;margin-right:2em;margin-bottom:0.5em;color:rgb(0,0,0);font-family:Verdana,Arial,Helvetica,sans-serif;font-size:13px"> when I read the document at <a href="http://libvirt.org/formatdomain.html">http://libvirt.org/formatdomain.html</a> about the domain's xml format ,"disk" element has a optional subelment is "readonly",when I read the paragraph:</dd> <dd style="margin-left:2em;margin-right:2em;margin-bottom:0.5em;color:rgb(0,0,0);font-family:Verdana,Arial,Helvetica,sans-serif;font-size:13px"></dd><dt style="margin-left:1em;margin-right:2em;font-weight:bold;font-size:larger"> <code>readonly</code></dt><dd style="margin-left:2em;margin-right:2em;margin-bottom:0.5em">If present, this indicates the device cannot be modified by the guest. For now, this is the default for disks with attribute <code>type='cdrom'</code>.</dd> <dd style="margin-left:2em;margin-right:2em;margin-bottom:0.5em"> </dd><dd style="margin-left:2em;margin-right:2em;margin-bottom:0.5em">it's say type='cdrom',I'm not sure that is correct or not,I think this is a slips of pen and a possible writting maybe device='cdrom'.</dd> <dd style="margin-left:2em;margin-right:2em;margin-bottom:0.5em">forgive me if I misundestanded it. also I'm not sure should send this question to libvirt-list or libvirt-user or others?</dd><dd style="margin-left:2em;margin-right:2em;margin-bottom:0.5em"> liuzhijun</dd>