External Drive Ejecting Itself on Write

Discussion in 'OS X Mavericks (10.9)' started by Megagator, Jan 3, 2014.

  1. Megagator macrumors regular

    Megagator

    Joined:
    Aug 25, 2010
    Location:
    USA
    #1
    I have a late 2013 iMac with several seagate desktop drives attached via USB 3. They all used to work great, even through the Mavericks update. But now one volume keeps ejecting itself whenever I try to write to it. Reading is fine, but once I try to move a file to the drive, it fails and Finder sends a notification telling me a "disk was not ejected properly, please eject the disk before disconnecting". Then the disk usually remounts and shows back up in Finder, but sometimes never remounts and needs to be unplugged and reinserted. Console gives these logs as I try to write a file:
    I tried reformatting, erasing, and a firmware update on the drive but this issue still persists. Any ideas?
     
  2. AppleFan22 macrumors regular

    Joined:
    Jan 3, 2014
    #2
    Probably not software issue

    It sounds more like this is to do with the actual USB slot itself. Try moving the hard disk to another slot. That might do it. Or it might even be the USB that's connected to the hard disk. Make sure that any connector wires are fully plugged in too. Also check the files on the disk. They may be broken, so it could be a faulty hard disk.

    Hope this helps :)
     
  3. bobr1952 macrumors 68020

    bobr1952

    Joined:
    Jan 21, 2008
    Location:
    Melbourne, FL
    #3
    Several? Meaning more than 2 and connected through a USB hub? If that is the case, I would guess that is the problem with not enough power to write.
     
  4. Megagator thread starter macrumors regular

    Megagator

    Joined:
    Aug 25, 2010
    Location:
    USA
    #4
    I've tried all four USB 3 ports on the back of the iMac, no difference. In fact I have an identical hard drive, but double the capacity, and switching USB and power from one to the other does nothing. One works, and the other doesn't.

    No hub, plugged straight into the iMac, and they have there own power supply from a power strip.

    There is also a huge thread from 2009 on Apple's support forum https://discussions.apple.com/thread/2151621?start=0&tstart=0. I will have to read through this, but it nothing to do with sleep settings.
    I guess this is an issue with the drive itself?
     
  5. Bear macrumors G3

    Joined:
    Jul 23, 2002
    Location:
    Sol III - Terra
    #5
    This sounds like a hardware issue with the drive. Contact Seagate for a warranty replacement if the drive is new enough.
     
  6. UpdateAddict macrumors newbie

    Joined:
    Jan 4, 2014
    #6
    For what it’s worth, OP, I’ve had similar problems of spontaneous ejections during heavy I/O with my external drive connected to a Late 2013 rMBP, the last a few days ago on 10.9.1. Continuing to have no such problems when the drive is connected to my non-Mavericks Macs (well, there are the sleep ejections on 10.8, but at least that doesn’t happen during I/O).

    Have you tested your external with other computers, preferably ones without Mavericks?
     
  7. Megagator thread starter macrumors regular

    Megagator

    Joined:
    Aug 25, 2010
    Location:
    USA
    #7
    Oddly, I have tested it on another iMac with Mavericks and it successfully copied hundreds of gigabytes without fail (same power supply). I don't have any non-Mavericks machines nearby.
     

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