DVD Problems Part II

I've finally managed to burn a working DVD! Whoohoo! :) Having gotten Windows XP up and running on my old Linux box, without a crash (yet), I tried again to burn some backup data onto a DVD. I tried 8x speed, 4x speed and both times it created a nice coaster. I then started to look for some sort of explenation, and a reason for why I just couldn't get anything to work. Firstly I found a few recommendations of the media we've bought (Legacy 8x speed 50 spindle) and they all said that they have had no problems what so ever with that brand. Then I checked the drive, to see if anything bad had been written about it. Not a word I could find. I did find a new firmware version though, and decided to upgrade. Having done that, I wanted to test the drive agian, but just to be on the safe side, i chose a disk from the second spindle we bought. Either the firmware helped or the entire first spindle is ready for the trash, but I managed to fill the whole DVD with readable data :)