Will Zeroing a HHD with Disc Utility identify bad sectors?

Discussion in 'Mac Basics and Help' started by Droooooj, Dec 15, 2013.

  1. Droooooj macrumors regular

    Oct 19, 2009
    London, UK
    I've bought a 2nd hand USB external HHD.

    The guy said it was mint condition and hardly used, but I wanna check myself if there are any bad sectors.

    I was gonna zero the drive anyway, and I wondered if doing so with Disc Utility would be enough to reveal bad sectors, if there were any to be found?

    Or do I need to check for bad sectors some other way?
  2. mfram macrumors 65816

    Jan 23, 2010
    San Diego, CA USA
    Hard drive firmware automatically remaps bad sectors. So you won't really know about them anyway.

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