ENELES!!! Thank you so much! The drive works perfectly now. To paraphrase from The Godfather Part I: "One day, and that day may never come, you may call upon me for a favor. But for now, I gratefully accept your technical advice as a gift from you on the day of your daughter's wedding."
All kidding aside, there's a lot of really important stuff (at least to me) on that drive, and I thought I'd lost it all. Once again, thank you!