Seagate 500GB recognised but not 2TB external hard drive

Discussion in 'macOS Sierra (10.12)' started by jcdnguyen, Aug 10, 2016.

  1. jcdnguyen macrumors newbie

    Joined:
    Aug 10, 2016
    #1
    Hey guys and gals,

    So I installed PB4 of Sierra this morning (Macbook Air 2012) but now I can't get one of my external hard drives to work.

    When I connect my Seagate 500GB Slim (which I use for TM backups), Sierra recognises it no problem.

    However, when I connect my Seagate 2TB Backup Plus, Sierra doesn't mount the drive. It is recognised in Disk Utility and I can select the greyed out drive but when I click 'Mount', nothing happens.

    I've tried different USB ports, restarting, restarting with the 2TB drive attached but still nothing, I can't mount it. Checked Seagate's website but they don't offer drivers for download.

    Any ideas? Help and information would be greatly appreciated.

    John
     
  2. grahamperrin macrumors 601

    grahamperrin

    Joined:
    Jun 8, 2007
    #2
    I have not tested this in Sierra but traditionally it can happen if an automated run of fsck_hfs(8) begins invisibly before you attempt to do things with Disk Utility.

    Consider the following file:

    /var/log/fsck_hfs.log
     
  3. jcdnguyen thread starter macrumors newbie

    Joined:
    Aug 10, 2016
    #3
    Hi grahamperrin,

    Thanks for the recommendation. I've found the file but what I do from there?
     
  4. grahamperrin macrumors 601

    grahamperrin

    Joined:
    Jun 8, 2007
    #4
    Does the word DIRTY appear anywhere in the file?
     
  5. jcdnguyen thread starter macrumors newbie

    Joined:
    Aug 10, 2016

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