I have tried: Disk Utility Disk Warrior Drive Genius 2 TechTool Pro 5 When I tried to rebuild the hard drive on each one, they all gave me the result, "failed," basically, except TechTool Pro 5, which said it completed it with no problems, but obviously it had no idea what it was speaking of because the external hard drive still did not mount on the desktop. I chose basically every thing that each program offered me that might help the disk, but I think it's finally dead. I've had to rebuild it about 3 or 4 times now and it's only been a year or so...? I'm assuming there's no hope left and my 1 TB external hard drive is done for, but I would like to see what the generous and intelligent people here had to say about my situation. Thank you for your consideration and help! --wad11656 EDIT: In Drive Genius 2, it also says that "S.M.A.R.T. not supported" for the external hard drive. Does this indicate anything? Thanks!