I’m having this exact same problem.
DVDFab was working fine for me forever. Then, all of a sudden, sometimes it wants to take 8 hours to burn a DVD. (rips it at normal speed, but the burn is at 0.1x)
I’ve tried much that has been recommended. Made sure the drives are DMA mode, uninstalled the drives and IDE channel, rebooted, reinstalled drivers, rebooted again, uninstalled Dvdfab and reinstalled.
I’m kind of at wits end. Thinking of buying another drive.
This is media that i’ve used a bunch in the past to burn lots of DVDs.
I’ve also tried different burn settings.
Here are my current settings that it is doing the slow burn:
8x write, SAO writing, 4472 MB, DVD-ROM booktype.
Media is Memorex 16x 4.7gb media.
Not every burn is slow burn. Just most of them.