I wanted to see if it was possible to dump the gamecubes disk's data content using an old xbox360 drive. I had this idea after looking at the friidump source code, this program uses Hitachi vendor defined debug commands to read / dump the raw data sectors of the gamecube disks. The old xbox360 drive I had was a Hitachi GDR3120L/0047 this drive was not supported by friidump but it looked close enough.
So I created GCDiskDumper from the friidump code its basically a cut down version of friidump that supported the GC only (you can add the wii code back in if you feel like it) and adds the extra Hitachi xbox 360 drive.
I hacked the drive code on my Hitachi xbox 360 drive so that it reads the disks BCA area as well

it looks encrypted though

details of my research / GCDiskDumper are here
http://www.staffs2.webspace.virginmedia ... dumper.htm