おー、出てくる出てくる

xen 
# virt-install -n fc5test -r 256 -f /xen/fc5test -s 4 --nographics \
  -l ftp://某FTPサイト/Linux/fedora/core/5/i386/os


Starting install...
libvir: Xen Daemon error : POST operation failed: (xend.err "Error creating domain: (22, 'Invalid argument')")
Failed to create domain fc5test
Traceback (most recent call last):
  File "/usr/sbin/virt-install", line 447, in ?
    main()
  File "/usr/sbin/virt-install", line 411, in main
    dom = guest.start_install(conscb)
  File "/usr/lib/python2.4/site-packages/virtinst/ParaVirtGuest.py", line 220, in start_install
    return XenGuest.XenGuest.start_install(self, consolecb)
  File "/usr/lib/python2.4/site-packages/virtinst/XenGuest.py", line 367, in start_install
    self.domain = self.conn.createLinux(cxml, 0)
  File "/usr/lib/python2.4/site-packages/libvirt.py", line 249, in createLinux
    if ret is None:raise libvirtError('virDomainCreateLinux() failed')
libvirt.libvirtError: virDomainCreateLinux() failed