Best Disk Utilities? Surface scan. Find bad sectors.

Discussion in 'macOS' started by lokiju, Sep 6, 2011.

  1. lokiju macrumors 6502

    Jun 10, 2008
    I have some external USB drives and one of them seems to be having issues.

    I've done the built in disk utility app and it does it's thing but never seems right.

    Is there another way built into the OS or a 3rd party utility or set of utilities that excels at checking and if possible repairing the health of your disk drives and for that matter the system as a whole?
  2. speacock macrumors member

    Jul 26, 2011
    We use DiskWarrior, fixes things that Disk Utility can't.

    I know others who recommend Onyx but I know nothing about it.

    If you need to get data off a corrupt or damaged disk (even things like a missing partition table) then I'd highly recommend UFSexplorer
  3. lokiju thread starter macrumors 6502

    Jun 10, 2008
    Thank you!
  4. Quad5Ny, Sep 7, 2011
    Last edited: Sep 7, 2011

    Quad5Ny macrumors 6502a


    Sep 13, 2009
    New York, USA
    Disk Utility only fixes file system errors not physical problems. Backup your data and see if formatting/re-partitioning the drive fixes the problems.

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