I've searched through the forums here and over at videohelp.com and haven't seen any similar posts, my apologies if I missed something.
So after taking a few years off from DL burning due to the massive number of coasters I was making, I decided to try it again to make a back-up of one of my dvds whose main title was so large that it had to be compressed to 60% to fit on a dvd-r (and this was just the title, none of the menus or anything else, I re-authored it using DVD Shrink to only have the main title, and it was still huge), plus I've got a new Vaio laptop that I picked up in february, so I was hoping to have better results, now that a few years have passed since my initial attempts.
I started at videohelp.com, looking through the guides and forums, and came to the conclusion that I needed to get ImgBurn (I've previously used DVD Decryptor on older machines, so I was somewhat familiar with it), so I came over here and started looking through the guides. I knew I needed to make an ISO to burn to the dvd (that's what I've done in the past for single layer dvds), so I looked through the guides and found this: http://forum.imgburn.com/index.php?showtopic=1777 . I read through it, and realized that, instead of making an ISO from DVD Shrink, I should output it to files instead.
So I loaded the disc in DVD Shrink, turned off all compression, and backed up the disc to output files (dvd_folder/VIDEO_TS). I then followed that guide and used ImgBurn to create an ISO and select the layer break. I went to burn the dvd, selecting the MDS file, and sure enough, right when it got to the layer break, it popped up an error and writing failed.
Here's the log from the start of the burn to the error, error in bold:
; //****************************************\\
; ImgBurn Version 2.4.3.0 - Log
; Tuesday, 07 April 2009, 17:27:23
; \\****************************************//
;
;
I 17:01:53 ImgBurn Version 2.4.3.0 started!
I 17:01:53 Microsoft Windows Vista Home Premium x64 Edition (6.0, Build 6001 : Service Pack 1)
I 17:01:53 Total Physical Memory: 4,028,528 KB - Available: 1,203,980 KB
I 17:01:53 Initialising SPTI...
I 17:01:53 Searching for SCSI / ATAPI devices...
I 17:01:53 Found 1 BD-ROM/DVD