I have tried many -R discs and I never get good results with my 812. I got some Taiyo Yuden 4X -R discs and unfortunately they are no better. It looks I am going to have to get a different drive to use my -R discs with. Here is my latest -R burn. I have tried all sorts of firmwares up to USON. This was the first try with VS05 832 firmware. I give up. I am done wasting good media on this drive.