I have read the Wiki about P2V and have also done a test conversion of a Windows Server 2012R2 with VMWare Converter that worked fine. Is there any reason that using a boot disc/USB and running qemu-img with the source raw disk(s) output to qcow2 files on the storage area for the VM wouldn't work just as well? From what I could tell VMWare Converter didn't do anything to the guest when converting the disk to VMDK. I still had to manually remove all of the old devices from the converted system and manually created the VM config with the GUI.