Can't play GC backups. Wii backups work fine.
My firmware is 4.1U with cIOS38Rev14 installed. I also installed cIOSCorp do be able to play backups directly from my disc channel. My first backup was a Wii Game (Super Mario Galaxy), which worked fine except for some stuttering and audio issues with the opening movie scene (but I see that's pretty common for that game). Then I made backups of a couple Gamecube games (Metroid Prime and Pikmin 2). Neither of them worked, but I saw two different behaviors.
Metroid Prime was recognized as a Gamecube game in the Disc Channel, but when I try to start it, the Wii Reboots. Pikmin 2 doesn't even get recognized as a gamecube game. My initial thought is that cIOSCorp is working fine because it was able to recognize Metroid as a GC disc. There might be something wrong with the Pikmin ISO since that's not even getting recognized.
I also tried running them through WiiGator's backup loader. The Wii just rebooted on both of them.
I'm burning the ISOs to TDK DVD-R discs using ImgBurn at 4x speed.
Thanks in advance!