Huh, interesting! The unit is a Pioneer DR-US124X. I thought it was a bit weird that there was no apple branding on it whatsoever. Now that you say this, I'm almost certain it was a replacement. I noticed that the ID select on the back of the external drive did not match up with the ID listed by the computer. I think I had to set it to 7 or something to get the computer to tell me it was ID 3. Now that I compare the two drives, I noticed that the pins representing the bits for the ID select are backwards, listed as 2, 1, 0 from right to left, compared to the apple branded drive from the comput