BeLooken,

1st, thanks for the response and info. It's incredible that the media from companies like RiData varies in quality. I guess I have been incredibly lucky in the past. I have many, many backups of DVDs using the RiData DVD -R DL and it must be that I have a inferior batch of disks.

During my testing and burning numerous coasters I have found out that some Matrix DVD +R DL burn ok and I have many RiData coasters, so it has to be the media. In fact as I write this, I'm doing another test to the Matrix media in background and it appears to be going well.

I already have a bookmark to order Verbs, lesson learned....