www.makemkv.com

I am lost on how to get this to work. I cannot get Demolition Man 4K to open in MakeMKV. I have gone back and tried other disc (4K and Bluray) and they open just fine. Windows reads the disc, but MakeMKV hangs at the attached screen. Any ideas??

unplug the drive wait a min
plug it back in
do not open makemkv
put the disc in the drive
let the os see it then once the os sees it open makemkv

you can also clean the disc with damp lint free cloth and dry with another to avoid water spots.

I think this is an issue with the Pioneer drive. I have the same issue with my Pioneer, but it seems to work with my Asus BW-16D1HT on 3.10 firmware, I'm ripping it now (switching between 3.10 and 3.03 solves read errors I may encounter). I was reading some where on here people saying Pioneer drives just struggle with UHD some times.

exactly the opposite for most people pioneers are way better than LG/asus rebrands
op likely has a power issue as the drive is usb powered maybe you too