Hi, The virt-install & virt-manager are checking if the physical device has been using by other domain. But they does not check, when the device is file or tap. So I add to check it. Signed-off-by: Saori Fukuta <fukuta.saori@xxxxxxxxxxxxxx> Thanks, Saori Fukuta diff -r 797e92fd5e0d virtinst/Guest.py --- a/virtinst/Guest.py Thu May 31 14:20:33 2007 -0400 +++ b/virtinst/Guest.py Wed Jun 06 11:34:33 2007 +0900 @@ -163,6 +163,7 @@ class VirtualDisk: try: try: count += ctx.xpathEval("count(/domain/devices/disk/source[@dev='%s'])" % self.path) + count += ctx.xpathEval("count(/domain/devices/disk/source[@file='%s'])" % self.path) except: continue finally: