This patch series supercedes an earlier series: https://www.redhat.com/archives/libvir-list/2011-December/msg00990.html Just before posting those patches (and leaving for 10 days of holiday), Paolo Bonzini suggested an alternate XML representation (noted in that original message), which has since been discussed and agreed on as the proper way to go. These new patches implement that alternate method: <disk type='block' device='disk' dev='/dev/sda'> <!-- SG_IO off --> <disk type='block' device='lun' dev='/dev/sda'> <!-- SG_IO on --> -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list