I just installed DIOS MIOS 2.10v and finally got it to work with my USB Loader GX
r1215
(both the latest versions)And i use WD HDD with FAT and 32kb cluster size. And i also have a GC disk inserted just incase.
The thing is, that sometimes i play for hours with no problems, but sometimes (i think when the wii tries to read from the disk because of the sound it makes) just shutdown.
And it happens randomly with random games (i'm not sure but i think it happens when the games are loading)
Any way, i didn't try to test with DML or with other loaders, because as i said sometimes i can play for hours whit no problems.