tar cf "$imgfile" "$outfile"
-if [ "$(echo "nativedisk; source '(usb0)/$outfile';" | "${grubshell}" --qemu-opts="-usb -usbdevice disk:$imgfile" | tail -n 1)" != "Hello World" ]; then
+if [ "$(echo "nativedisk; source '(usb0)/$outfile';" | "${grubshell}" --qemu-opts="-device ich9-usb-uhci1 -drive id=my_usb_disk,file=$imgfile,if=none -device usb-storage,drive=my_usb_disk" | tail -n 1)" != "Hello World" ]; then
rm "$imgfile"
rm "$outfile"
exit 1