On Tue, 2013-12-03 at 15:00 +0100, Stefan Wendler wrote: Unfortunately this is a legacy limitation of virt-v2v which is very hard to remove. You can try to fix it by manually patching GuestfsHandle.pm in virt-v2v to remove the 'iface' argument to add_drive_opts. Specifically, find the following: $g->add_drive_opts($path, format => $format, iface => $interface, name => $name); and change it to: $g->add_drive_opts($path, format => $format, name => $name); and find the following: $g->add_drive_opts($transfer, format => 'raw', iface => $interface, readonly => 1) if defined($transfer); and change it to: $g->add_drive_opts($transfer, format => 'raw', readonly => 1) if defined($transfer); The effects of this change are not well tested, and will definitely break conversion of older RHEL guests. Guests which natively support virtio should probably be ok, though. Matt