G4 Yikes and sawtooth adding and up grade hard drives

[Darryl Mueller]

  On G 400 yikes and G 400 sawtooth. It seems that you can keep using 
the existing hard drive on these macs add a pci controler in the slot 
and then add a new ata hard drive. Correct? Then the 2 drive work as one 
correct? Please correct me if I am wrong. Then on the new drive, because 
apple doesn't support 3 party, firmware, I know just an excuse but when 
I have called with problems in the past it's easy to blame 3 party, so I 
am looking for some kind of 80 gig. 120 gig.etc apple drive, got any 
ideas. Or what drive would be a close copy of and apple drive. And what 
about the pci controler where and do they cause any conflicts. I have a 
G4 400 yikes with a 10 gig that in the biggest need and my main one. I 
also have a G4 500 sawtooth with a 27gig that I just got and might start 
using it, my only problem is I am not sure how used it is. Dors mutiple 
hard drive and pci controler have any reliability problems.