As already said, the 128 Gb is the limit. I have one, and never used drive larger than 120Gb, actually, largest was 80. Now I have a 13G in it.

Don't forget the 8Gb limit for the OS X partition. The Beige IDE have a problem with this. If a required system file is located over the 8GB barrier, the system won't boot. I had this issue once, and I remember it still today! Took me a long time to figure out a way to reinstall OS X on it.

The problem still exist with OS8 and 9, but since the system is smaller, is less likely to happen. But still, you're taking chances if you do not partition.

My 13 GIG has its first 8Gig parition in 3, for OS 8, 8.5 and 9. The remaning is Data.