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Larry, if the drive is not being recognized by multiple devices, it's almost surely dead. There are no tools to run on it unless it was being mounted. There are a few other places we could, or I could look for you, but i doubt its going to show up. This is probably a loss, or if there is really important stuff on it, you could send it to a data recovery shop, will run you 1-2k to have them try and recover it.