OPMODE_MEDIA_BITS
(((sc)->sc_opmode & OPMODE_MEDIA_BITS) != \
((newbits) & OPMODE_MEDIA_BITS))
sc->sc_opmode = (sc->sc_opmode & ~OPMODE_MEDIA_BITS) | tm->tm_opmode;
sc->sc_opmode = (sc->sc_opmode & ~OPMODE_MEDIA_BITS) | tm->tm_opmode;
(((sc)->sc_opmode & OPMODE_MEDIA_BITS) != \
((newbits) & OPMODE_MEDIA_BITS))