Other then that just posted above.
[I]First.[/I] You DVR-104 burner can only burn at 2x maximum on dash media (1x max on RW’s), so please forget any “4x burns”, less 13 minutes… (Note also, plus media is not supported at all on this model.)
Anyway, no nowdays 16x media likes 2x burnspeed.
[I]Second.[/I] Try to defragment your HDD (hard disk drive). Seems your subsystem is not able to keep up, not even at 1x burnspeed, heh.
[I]Third.[/I] And best of all get a new box and burner to replace this at least 7y old dinosaur.