Fire-proof safes are generally designed so the internal temperature stays at or below ~350°F. Is there a computer medium I can write that’s likely to survive an extended stay around that temperature? Storage size doesn’t matter too much; a CD would be plenty (although an actual CD would presumably turn to soup).

@anth@a.9srv.net If you can find a UL 150 certified media safe it should stay at or below 150°F which should protect tape, CDs, etc.