Only copy 2x on fly with DVD Player



i have a yamaha 6x recorder and try to record off a panasonic 5x dvd player yet it only alows me to record at 2x on the fly, apparently the didgital extraction speed of my dvd is not quick enough to allow recordings any faster would it be better to just get a normal cd player to allow 6x recordings on the fly or is there anything else i could try? Thanks