Boot issues using multiple drives

[Jeff Yowell]

I am using Ubuntu on a Mac G4.  I have OSX installed on an SATA bus.   
Then, I have Ubuntu installed on a disk on the machine's ATA bus.
Ubuntu doesn't seem to want to find the SATA bus, and always goes  
into Ubuntu regardless of how many times I reset the PRAM on the  
machine.

Has anyone else had experience with this?  How can I boot into OSX  
when I have a linux disk on the system?

Thanks


jeff