Unreadable sectors / out of range errors

Hi Guys, I wonder if anyone can help me out. I am getting errors when trying to copy some DVD backups. (the original has already been ripped, decompressed and burnt to a blank).

No matter what software I use (and I’ve tried most of them) I end up with ‘unreadable’ and ‘out of range’ errors. It also happens over a variety of brands of blank media too.

I’m beginning to suspect it’s a hardware issue? (I’m using a 4x liteon writer)

Has anybody got any ideas? Any help would be appreciated…

Cheers Maf