I purchased a Western Digital 160GB hard drive back when I only had my old TiBook, and found out when I got it home and put it in my external FireWire enclosure that the TiBook could only format it up to 128GB. I have an iMag G5 now, and finally have gotten the drive cleared off. I want to re-format the drive so that it can now make use of the extra space that was wasted before, but can't figure out how to. Disk Utility will only continue to recognize it as an 128GB drive, not its full size. Any advice on what I need to do?