Pat, I found the following link that deals with this issue via an open firmware edit: http://nanchatte.wordpress.com/2008/04/27/128gb-large-hdd-lba48-support-on-the-g4-cube-with-leopard/ I've been using this edit with my own G4 DA and a 250 GB second drive. There's also a way to do this with the command line, although I don't know enough about UNIX to understand it. Do a search on the Google Groups G3-G5 list; I remember seeing it there. - Michael B. in Cincinnati