I have a 2TB My Book Studio connected via USB to an airport extreme.I have been using my mybook (sounds redundant lol) with my airport extreme to back up automatically through time machine for over a year now. All of a sudden the other day it stopped working. The Airport utility kicks in and advised that there was a problem with the attached hard drive, connect it to the computer to fix. So I unplug from the airport and airport immedately starts responding again.I also connect my itunes through the hard drive. I really really hope my hard drive is not f'ed because I have about 200 gigs of music on there that I would be very upset if I had to replace. When I plug the hard drive into my MacBook the WD SmartWare logo appears in the top right corner as normal but the hard drive does not appear on the screen or in finder. The disk mounts in disk utility when I connect it striaght to my macbook. Under 2 TB WD My Book, there is a sub hard drive called "disk1s2". When I do the run repair and run verify on the main 2 TB WD My Book, its says both are ok. WHen I run those test under the "disk1s2" it says Invalid key length, could not be verified completely. UNder disk repair it says cant repair this disk, Back up as many of your files as possible, reformat the disk, and restore your backed-up files. PLease tell me this isnt my worse nightmare, I mean who makes a back up of their back ups.