I have a Seagate External Hard Drive that I have been using for my Time Machine backups for a little over a year. I connect it to all of the Macs in the house every week and run the backups. Today, when I was done backing up my first MacBook Pro, I clicked eject in Finder like I always do, but it would not allow me to. I confirmed that the TM backup was completed and cleaned up and all and still would not let me. I told it to force eject and after the prompt on the screen, I detached the drive. When trying to connect to the second machine (Mac Mini), it would not recognize. Rebooted and so on...no success. I connected it again to the first machine and it isn't showing up either. In Disk Utility however, it shows the drive, but the TM partition is grayed out (it's the only partition on the disk). It won't scan, repair, or unmount or anything. I decided, fine, I'll even try to erase the disk and initiate the backups from scratch. It just sits in the "Unmounting disk" phase for 20+ minutes. Is this drive totally screwed? Is there any way to get it so I can erase and format it from scratch? Thanks!