6X is one of the POSSIBLE write speeds, but it's rated as 2.4x media. I have successfully burned over 100 DVD+R/DL DVDs at 6x, under xp with the same media/software/hardware, however.
I purchase them from HERE
This is the link for the plextor recommeded media formats / manufacturers for the PX-716UF.
Here is a screenshot of PlexTools showing this blank media in my drive:
Can't burn them at 8x, only 6x or less... and under Windows XP with all the same hardware and media, I have successfully burned over 100 DVD+R/DL DVDs at 6x. The media itself is rated at 2.4X. I will try another burn at 2.4X. I don't know why I burned so many at 6x and now I'm having problems, however.
... I just tried to burn the same media - different movie - at 2-2.4x speed. The burn failed in exactly the same way, in exactly the same spot.
I've tried three different movies so far.... at 2.4x burn speed for the DL media. All failed. AND I tried TWO of those movies on 4.5 GB verbatim media - both of those SUCCEEDED.
I see no options in CloneDVD that talk about removing or replacing the original's layer break.... I don't have CloneCD... I may download that later if I can't resolve the issue. I REALLY don't want to add another cd burning application to my methods though since what I have has worked so well for so long. I'm still convinced it has something to do with Vista.
My plextor model is a full external model. Can connect it with USB or Firewire. It has no IDE interface.
Regarding the link you sent... it's good information. But... how come I was able to burn over 100+ DL DVDs with this same hardware/software/media combination? The only thing I've changed is my operating system. If the information in that link is applicable to my situation, I shouldn't have been able to do that.
Yes, I am using the DL +/-R option on CloneDVD. Otherwise, it will shrink and reduce the quality of the files to 4.7GB instead of 8.5.
I just tried to burn a DVD UDF (data) cd using my DL media with PlexTools, at 2.4x speed. It failed in the SAME SPOT - "Writing Lead In" - failure. "Power calibration failed (code 037303)" is the message Plextools gives.
I used to be able to burn UDF format DL DVDs all day long with no issues under XP.
The result of all my tests.... I can burn DVD single layer verbatim media all day long. I can no longer burn ANY DL media of any format at any speed - and the only thing that has changed is that I have upgraded to Vista. All other software, hardware, and media are exactly the same.