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- Sep 5, 2011
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I'm trying to repair my 13" MacBook Pro (2009) HD with DU off Snow Leopard DVD. The first time I did repair it said it was successful, but I still couldn't boot up off the hard drive. I ran repair again and now I keep getting error message: "could not unmount disk". Is there a way I can still try to repair or is reinstalling OS inevitable? I do have backup.