The drive is an older Sony laptop drive. I'm using Verbatim DVD+R and they work for 90% of my burns and I have done hundreds. The ones that did work before were the exact same discs as the ones I am trying to use now. I am going to try to set the booktype to DVD-ROM but I don't know why this should matter as I use these discs all the time for all my burns and I have never had to check the box before to get working discs.