I have a 2TB Western Digital drive in my MP that I use as my Time Machine drive. I noticed to day that Disc Utility says it sails SMART check or something like that and that there is physical damage to the drive and to take any data off of it while I can. I tried to do that but it doesn't seem to work (also the reason why I noticed the problem in the first place). I don't really need the data off of it but I would like to at least erase it before I RMA it. Disc Utility cannot unmount the drive so I cannot erase it that way. When I just try to delete the backups, it will not let me. Any ideas?