Jesper, Well, I've done it w/ a G4 500, and an MDD 1.25DP. It's software RAID, but it worked just fine for me. Can't remember how to do it after install, but during an OS X 10.2+ install, it's an option in disk tools. As for speed, size, etc, I would use identical drives. But then again, maybe that's just me. Nick Jesper Bylund wrote: > 1) Is it possible to use RAID in a G4 Quicksilver only using the > existing hardware? (e.g. some kind of software hack) Or do I need to > buy a new PCI ATA controller card? > > 2) Is it possible to use two disks with different spcs (7200/5400 rpm > etc) for RAID? Will they perform as the slower disc or worse or not at > all? > > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4