VD_EOV
while (HSV_DESC_TYPE(volp) != VD_EOV) {
case VD_EOV:
while (HSV_DESC_TYPE(volp) != VD_EOV) {
case VD_EOV:
HSV_DESC_TYPE(volp) != VD_EOV; n++) {
case VD_EOV:
case VD_EOV: