I have a Sony DW-U18A, which is supposed to be a +/- burner. When trying to back up data to a disc I find that I get a failure message with Nero saying 'incompatible disc', now this is with a DVD+R, DVD-R and sometimes with a DVD+RW. I have tried many brands of disc in the hope that one may work with my burner. I do sometimes get a burn without any problems at all, but only once in a bluer moon. The drive has no problem burning CD-R's or CD-RW's and will erase DVD+RW discs without fail.
It's just that I have a similar problem with a Mesh PC and a SONY DW-D22A-B2. I've had lots of discussions with Mesh technical help (after the usual long wait to get through) and following their advice to remove Pinnacle the unit eventually went back. The unit was said to be faulty so they sent a new one but still won't save data to DVD. So they told me to try Nero but still no joy, although only have Nero 5.5 with updates so could be software?
Just wondered if you've discovered anything else to try?