Unable to access Lacie external disc

Discussion in 'macOS High Sierra (10.13)' started by blueb3ll, Feb 27, 2018.

  1. blueb3ll macrumors member

    Joined:
    Nov 3, 2010
    #1
    I have 2 Lacie external drives in MSDOS (Fat32) format.

    Since upgrading to High Sierra I can no longer access them and sometimes they also make the system freeze.

    I have tried to erase them in Disk Utility but it did not work, see attached screenshot.

    I do not know what to do now in order to make them work and would appreciate any help.

    Thanks.
     

    Attached Files:

  2. casperes1996 macrumors 68040

    casperes1996

    Joined:
    Jan 26, 2014
    Location:
    Horsens, Denmark
    #2

    Sometimes when I get this error, it works too erase them to a different file system and then re-erase them to what I want. Sometimes also having to change from GUID to MBR.

    Alternatively you could try via the Terminal
     
  3. blueb3ll thread starter macrumors member

    Joined:
    Nov 3, 2010
    #3

    Thank you for your reply.
    Disk Utility cannot erase the disc as it cannot be unmounted.

    Could you please explain how to do it via the Terminal?

    Thanks
     
  4. CoastalOR macrumors 68020

    CoastalOR

    Joined:
    Jan 19, 2015
    Location:
    Oregon, USA
    #4
    I have seen the unmount error also. What I do is after the can't unmount problem, click the Done button, select the top level drive (LaCie Rugged in this case), click erase again, name the volume, select the partition map, and ok the erase. It seems to work the second try for me.
     
  5. casperes1996 macrumors 68040

    casperes1996

    Joined:
    Jan 26, 2014
    Location:
    Horsens, Denmark
    #5
    First, run

    diskutil list

    and identify the disk on the list. Having identified the disk, going by a name such as "/dev/disk4", run the following command

    diskutil eraseDisk JHFS+ (if you want HFS+ as the file system) 'name of drive' (no spaces unless in quotation marks) 'Disk ID'
     
  6. blueb3ll, Feb 28, 2018
    Last edited: Feb 28, 2018

    blueb3ll thread starter macrumors member

    Joined:
    Nov 3, 2010
    #6
    Thank you for your tips.

    I tried it several times but unfortunately it did not work :(

    I have also tried it under Windows but it just froze.
     

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5 February 27, 2018