I found that the system disk of that windows xp virtual machine uses &#39;msdos&#39; parttype.<div>So i partition another disk with &#39;msdos&#39; and formated it to ntfs, and attach it again.</div><div>But no luck. the windows xp still can&#39;t recognise this parttion and i have to delete this so called &#39;unknow partition&#39; and recreate it from inside windows.<br>
<br><div class="gmail_quote">On Thu, May 31, 2012 at 2:41 PM, me,apporc <span dir="ltr">&lt;<a href="mailto:appleorchard2000@gmail.com" target="_blank">appleorchard2000@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>Hi,</div>I use guestfs.part_disk to  partition one disk with &#39;mbr&#39; and formated it to ntfs, then attach this disk to one windows xp virtual machine.<div>But this windows xp can&#39;t recognise that partition, it says &#39;uknown partition&#39;</div>

<div><br></div><div>Why it is so, and how to solve it? May someone help me with this problem?</div><div><br></div><div>Thanks.</div>
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