CD_FLAG_VALID_TOC
softc->flags &= ~(CD_FLAG_VALID_MEDIA|CD_FLAG_VALID_TOC|CD_FLAG_OPEN);
if (softc->flags & CD_FLAG_VALID_TOC) {
softc->flags &= ~(CD_FLAG_VALID_MEDIA|CD_FLAG_VALID_TOC);
softc->flags |= CD_FLAG_VALID_TOC;