A few months ago I found my old Miami Vice DVD box sets and decided to back them up with MakeMKV.
Seasons 1, 3, 4 and 5 are all normal 6 disc sets, but season 2 comes on 3 flipper discs. (Both seasons 1 and 2 were first released as flipper discs in 2005 and rereleased a couple of years later on 6 discs. I have the rerelease of season 1 but original release of season 2)
All seasons ripped normally except season 2, which won't. I did manage to rip 1 side of 1 disc and even that took several tries and I don't know why it eventually worked. It took a lot longer, with the disc spinning up and down a lot if I remember.
I don't think disc rot could be the cause but I can't play them normally to check because I don't have access to any region 1 player right now. The drive in my computer is a Pioneer BD drive but I also tried 2 USB DVD drives and none of them worked.
Is there something about flipper discs that messes with PC drives?