I knew this would eventually happen; I lost one of my external backup hard drives yesterday. I fired up the backup drives and when I tried to connect to one of them, I kept getting the message "Disk is not formatted. Do you want to format now?"
But as you may have guessed, I do have multiple backups so there's no real loss other than I now have a very fancy brick sitting on my desk.
As an aside, does anyone know what could have happened to the hard drive? It is a Western Digital MyBook external drive.