Someone tried the TDK 4x DVD-R made in Taiwan? Media Code is TTG01. When burned @4x with my 851S, the disc is unreadable. At 2x itÂ´s somehow ok, but high error rates (Pi Max = 500/Average = 150). Firmware is GS0F (overclocked 451s).
searching the media forum it looks like those discs record that way no matter what the recorder.
some of the discs in this thread appear to be a newer reb than the ones you are looking at and they scan better