MBPro won't read external HDD

Discussion in 'Mac Basics and Help' started by zansaif, Oct 28, 2011.

  1. zansaif macrumors newbie

    Oct 28, 2011
    I'm new here so I apologize if this is in the wrong section. I have a MacBook Pro, running OS X 10.7.2. And my external hard drive is a WD passport that is 1TB. It's been working fine but today I accidentally unplugged it without ejecting it and ever since then it won't seem to work. I get a "NTFS - 3G" error. When I enter Disk Utility it shows my HDD, but I can't Verify it or Repair it.

    Here is the error message:

    NTFS - 3G

    NTFS-3G could not mount /dev/disk1
    at /Volumes/Untitled because the following problem occurred:

    Error reading bootsector: Input/output error
    Failed to mount '/dev/rdisk1': Input/output error
    NTFS is either inconsistent, or there is a hardware fault, or it's a
    SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows
    then reboot into Windows twice. The usage of the /f parameter is very
    important! If the device is a SoftRAID/FakeRAID then first activate
    it and mount a different device under the /dev/mapper/ directory, (e.g.
    /dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation
    for more details.

    Any ideas on what's up?
  2. zansaif thread starter macrumors newbie

    Oct 28, 2011
  3. bmcgonag macrumors 65816


    Mar 20, 2007
    If you're using NTFS-3G, then I guess you have it formated in NTFS. It won't be able to be repaired or verified in that format.

    You can however connect it to a Windows machine and it should in theory give you the option to fix errors by doing a chkdsk in command prompt, or by going to the disk tools and selecting to check and repair disk errors.

    NTFS-3G only lets mac write to the format as far as I know. I don't think it will be able to verify or repair that format type. I could be wrong.

    I've had the same issue in the past, and I had to use Windows (sadly) to fix it. I just quite using an NTFS format with mac, and it's been much simpler.

    If you need to go between mac and windows, I would suggest Fat32 format. Just remember that it won't handle files larger than 4 GB in size.

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