Received a new batch of discs. Upgraded firmware of dvd drive and uninstall and reinstall the storage controller drivers. The previous disc were mkm001. The ones I have now are mkm003. Copied settings from last good burn.
ihas424 GL1B
Opc=on
burnproof=off
Force HT: Yes, Online HT: No, OverSpeed: Yes, SmartBurn: Yes
write speed=4x
Only burned one disc but it seems good to go so far. I hope.