set format for raw images

qemoo

@@ -49,11 +49,11 @@ checkImg(){
 			echo 'error'
 			exit ${LINENO}
 		fi
-	elif  ! qemu-img info "$IMG" | grep -q "file.*raw" ; then
-		echo "virt"
+	elif  file "$IMG" | grep -q "ISO 9660"; then
+		echo "iso"
 		return 0
 	else
-		echo "iso"
+		echo "virt"
 		return 0
 	fi
 }
@@ -146,10 +146,11 @@ run() {
 case $type in
 	'virt' )
 		echo "Virtual machine image: $IMG"
+		qemu-img info "$IMG" |grep -q "file.*raw" && RAW=",format=raw"
 		cmdline="
 		$COMMON \
 		-boot c \
-		-hda $IMG"
+		-drive file=$IMG,cache=none$RAW"
 		run $cmdline
 		;;
 	'blockdev')