Currently Being ModeratedJan 10, 2013 2:51 PM (in response to Radiation Mac)
I figured it out. I used Disk Utility to erase/format the new disk, but it only created a 500 MB, not 500 GB partition. I reinitialize the disk several times before I noticed this. I finally got a 500 GB partition and am using SuperDuper! to copy the data from one to the other...and it's working.
Sorry for the false alarm.