PR_PREVENT
cdprevent(periph, PR_PREVENT);
cdprevent(periph, PR_PREVENT);
|| ((action == PR_PREVENT)
|| ((action == PR_PREVENT)
daprevent(periph, PR_PREVENT);
if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
saprevent(periph, PR_PREVENT);
saprevent(periph, PR_PREVENT);
saprevent(periph, PR_PREVENT); \