I had an old external hard drive enclosure (OWC Mercury Elite FW400). It contained a 120 GB ATA/IDE hard drive. I wanted a bigger drive, so I purchased a new Seagate 500GB Ultra ATA HD. I though I could just pop the new drive into the old enclosure. So I did this, but Disk Utility is telling me that the capacity of the drive is only 128 GB. Does anyone know what the problem is? And does anyone know how/if I can fix this? Argh.