http://bugs.winehq.org/show_bug.cgi?id=23799
--- Comment #20 from Austin English austinenglish@gmail.com 2010-07-27 10:19:28 --- (In reply to comment #13)
"linux isn't seeing the disk either" = unable to mount? Then it's certainly not a Wine problem. After some research and it seems a plain DVD/R won't work anyway for dumping Wii media. There only exist some PC DVD drives that can dump Wii DVD for whatever pirating purpose.
--- quote --- Use a LG-8164b or LG-8163b or LG-8162b or LG-8161b dvd drive. It might even work with other hitachi drives with GDR in their name (just try, but don't complain). ... --- quote ---
If you are not using any of these listed drives please don't bother with something questionable that neither Linux kernel nor Wine can do.
Which is why I said in comment #8 that this may not be fixable...