Wii U user here, lots of discs, some won’t read even though immaculate, hoping to resolve issue by dumping.
How are you going to dump the discs that won't read? 
Or am I misunderstanding something?
3 2019-08-01 13:39:22 (edited by Hiccup 2019-08-12 13:05:01)
As I understand it, wudump reads the discs in basically the same way the system does when playing them, although it probably does less checks on the disc than the system menu, so it might work better. But if you have no luck with that you could use disc2app to make filesystem dumps of the discs. These aren't disc images so can't be submitted to redump, but they could still be useful.
Here is the Wii U dumping and submission guide:
http://wiki.redump.org/index.php?title= … ping_Guide
Here is the undumped list, in case you have any of those and want to prioritise them:
http://wiki.redump.org/index.php?title= … _U_Missing