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As the title suggests, what's the best way to go about doing this?

I'm talking about figuring out bad sectors in the hard drive that already has OS X installed, and that I'm using right now to do stuff.

Of course the correct answer would be some software that runs from a USB, and that's compatible with Mac, or something like that. Could somebody point me to this?

merged by nohillside Apr 16 '13 at 6:03

This question was merged with Checking for bad blocks without formatting because it is an exact duplicate of that question.

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