On Fri, 4 Mar 2005 17:50, Hans du Plooy wrote:
On Thursday 03 March 2005 16:33, James Knott wrote:
There seems to be a difference between "dual layer" and "double layer." Reason I suspect this, is because I bought a Verbatim "Double Layer" 8.5GB DVD and copied the 9.2 Pro DVD onto it. Unforunately my normal DVD-ROM, and no other DVD-ROM I tried. It does work on a few DVD writers though.
Think of "double layer" or "double sided" as two separate disks, that just happen to share the same piece of plastic. A dual layer disk has twice the capacity available, without changing or flipping.
Could there be a difference between the layout of data on the disc between "double layer" and "dual layer" ?
I know "double sided" - the disc I used definitely wasn't double sided. That's why I'm curious of what the difference between "double layer" and "dual layer" might be.
My drive (LG 16x DVD-ROM) can read the original disc fine, but no the copied one. No other DVD-ROM I've tried it on would read the copied one.
I had a similar problem. I burnt the image on the Verbatim DVD using a lite-on Writer and found that I could not read the image at all with my Pioneer Single layer burner. I then updated the firmware on the Pioneer and found that I could read the image but was flaky. At one stage I managed to verify the DVD with YaST but another time it would not verify. Also when using the image to do a new install it would hang every so often. This brings me to believe that the tracking between different writers may not be 100%. Meaning a disc created in one machine may not be readable in another machine at this high density, whereas you will find it will always be readable in the machine that created the disc in the first place. Also I think the media itself can have an effect on the outcome. I have DVD's that I cannot write to in one Writer but using another brand of Writer there is no problem. -- Regards, Graham Smith ---------------------------------------------------------