[ Thanks to Boris
Derzhavets for this link. ]
“Virt-install rejects to install Fedora12 PV DomU which
is not yet in the dictionary in meantime. XML startup file for f12
allows to avoid this restriction via command :# virsh create f12-pv-install.xml“I believe mentioned restriction is mostly connected with xVM
version 3.3.2 unable to handle ext4 FS for boot partition of Linux
DomU”