Enabling TRIM causes USB external drives to eject improperly on sleep?

Discussion in 'OS X El Capitan (10.11)' started by JoeTheZombie, Apr 9, 2016.

  1. JoeTheZombie macrumors newbie

    Mar 17, 2006
    I have an older Samsung SSD drive, so I purchased this StarTech USB/SATA adapter cable so I could use the drive externally on my late 2013 iMac. I then enabled TRIM using the terminal:
    sudo trimforce enable
    This worked, and the drive works well. But as a side effect, it has caused itself, as well as my Seagate Backup Plus Desktop Drive (4TB) to spontaneously eject whenever the computer sleeps. I then get the warnings in notification center that the drives have not been ejected properly.

    I turned off TRIM using the terminal:
    sudo trimforce disable
    And just as I thought, I no longer have problems with drive ejection during sleep. Anyone else seeing this? Any workaround?
  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    This does not fix your problem, but TRIM does not work over USB, so there is no point in trying to enable it.
  3. JoeTheZombie thread starter macrumors newbie

    Mar 17, 2006
    Ah, thank you. I will keep it disabled then and avoid the issue. :)

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