I have a WD 2 TB mybook (less than a year old) that I have partitioned to use for both my and my wife's time machines (2 separate laptops). The last time I backed up my computer was about a month ago. My wife...well...it's been a while. With iCloud apparently being Lion only, I thought I'd upgrade our machines, but not before backing them up. When I plug the HD into my machine, only her partition shows up. When I plug it into her machine, only mine shows up. Before, they would both show up. Needless to say, TM won't work because it can't see the HD. If I go in to disk utility with it plugged in to my laptop, my partition is there, but it is greyed out. I'm not very experienced with this type of stuff. Should I repair the disk? Should I just scrap the HD and wipe it? I'm stuck. Thanks if anyone has any ideas!