Only certain drives could use firmware tricks to read and dump Wii games. There's a thread about it stickied here in Support. You cannot, however, use those drives to directly read Wii discs to play in Dolphin (that would require Dolphin to have code from something like FriiDump).
It's usually easier (and faster) to use Wii Homebrew like CleanRip is all you want to do is dump a disc.
It's usually easier (and faster) to use Wii Homebrew like CleanRip is all you want to do is dump a disc.