you lose 80 gb of usable space. i have yet to hear of any long term detrimental effects, which makes sense as the ATA-4 bus can only "see" some of the drives, and ignores the rest. sandor Rennlist #031031-4586 ----------------------------------- On May 10, 2004, at 5:59 PM, Richard Kriss wrote: > I know this subject was beat to death a few weeks ago. The problem is I > trashed the postings and question my memory about what I read. > > I may be able to get 200GB, 7200 RPM, 8MB cache ATA/100 drive to > replace > the aging 30GB drive that came with this G4-450 AGP machine running > 10.3.3 > with an ATA-4 Bus. > > As I recall the postings the new (to me) 200GB drive should work okay > but > will only show up as a 120GB drive. > > What iis the downside to installing a 200GB drive on Mac that will only > recognize 120 GB. > > aRKay