I have a Pioneer DVR-110D. It will only burn with -R disks. It says it should do all types, DVD -R, +R, and both RW types. It will actually start burning with nero 126.96.36.199 but when it gets to the very end, I get a "could not perfrom disc at once write, burn failed". No probs with the -R's though. I have 5 coasters now, any ideas? I also have 7gb free on the HD with WinXP on a HP pavillion.