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Mountain Lion improperly ejects external disks

25850 Views 151 Replies Latest reply: Mar 30, 2014 6:52 AM by E Sheard RSS
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wjackman Calculating status...
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Aug 29, 2012 9:00 AM

Has anybody else had this problem? Ever since I updated to Mountain Lion, my external hard drives are periodically and seemingly randomly ejected, giving me an error message about improperly ejected disks. I have two drives, daisy-chained in firewire on a 2012 iMac.

 

Any help would be welcome. Thank you in advance for your help.

iMac, Mac OS X (10.7.1), 3.4 GHz Intel Core i7
  • Sam Beaver Level 1 Level 1 (120 points)
    Currently Being Moderated
    Aug 29, 2012 9:34 AM (in response to wjackman)

    i have this problem too on the imac 2011. swapped all externals to connect with USB and used external power bricks/cords. external drives either connect a short time after connected or they don't.

  • Krutsch Level 1 Level 1 (0 points)
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    Aug 29, 2012 2:40 PM (in response to wjackman)

    I have a similar problem; however, when I reboot my MacBook Pro (or shutdown and restart later), one of the drives will be reported by Mac OS X that it cannot be repaired.  I have wiped, repartitioned and reformated a couple of times and this keeps happening.

     

    I have noticed that if I manually unmount (i.e. eject) the drive, prior to shutting down the drive, I don't have this problem.  Once in a while, however, the drive spontaneously unmounts or I cannot eject the drive at all and have to reboot - when the latter happens, the drive is corrupted.

     

    Mountain Lion ROCKS!

  • xenicuslongpipe Calculating status...
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    Aug 29, 2012 3:58 PM (in response to wjackman)

    Glad I'm not the only one with this. Mountain Lion is constantly ejecting my external card reader. I think it also caused corruption to my external HDD which was ejected too.

     

    Any more word on this?

  • MSW_MAC Calculating status...
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    Sep 3, 2012 11:43 AM (in response to wjackman)

    Me too. I have my entire itunes and Time machine on 2 external drives (one connect with Firewire 8000, one with  USB2.0) neither drive is partictioned. I was streaming everything to Apple TV too- but nbow nothing. Can't mount external drives, cant' backup and can't watch anything !!! Apple- say someting.

  • RRFS Level 5 Level 5 (4,425 points)
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    Sep 3, 2012 11:49 AM (in response to wjackman)

    I would do a Repair Disk from Disk Utility, from there do a Repair Disk Permissions and see if the problem persists.

  • MSW_MAC Level 1 Level 1 (0 points)
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    Sep 3, 2012 1:10 PM (in response to wjackman)

    Tried all of the above- repair everything and still nothing. Anything else i can try?

  • Sam Beaver Level 1 Level 1 (120 points)
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    Sep 4, 2012 6:45 AM (in response to MSW_MAC)

    you say you have daisy-chained through firewire.

    what happens if you try one at a time, with the drives recieving power from their own cords?

  • RRFS Level 5 Level 5 (4,425 points)
    Currently Being Moderated
    Sep 4, 2012 6:56 AM (in response to wjackman)

    Do the drives have their own power sources? What baran are they? Some are not playing well with Macs especially USB 3.0 that are connected as USB 2.0. Do the FireWire drives show up in the list of Disk Utility? Are they formatted correctly?

  • michaelfrommonterey Calculating status...
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    Sep 5, 2012 1:26 PM (in response to wjackman)

    I, too, am having hard drive problems with my new Macbook Pro 15" Retina, specifically it won't unmount or eject one of my USB drives. I can shut-down the computer and remove the drive, but that's the only way to eject it without a "force quit." I also can't run Disk Utility on it because it won't unmount.

  • Bryce Graven Calculating status...
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    Sep 12, 2012 10:04 AM (in response to wjackman)

    Same thing over here.  Only seems to be an issue with my USB drives.  Happens about 1 out of 5 times I use the spotlight shortcut.  I have heard it is a problem with the drive controller but havent been able to fix.  Also seem to be having issues with my drives running really hot since updating.

  • kbford1 Calculating status...

    I am having the same problem with a Seagate 3 TB Thunderbolt drive.  Drive gets improperly ejected, then wont show up on desktop or disc utility until I reboot.  My Firewire external drive is fine.  Even though not showing up on desktop, System Info still shows drive connected via Thunderbolt port.  And it will eject randomly, not just at sleep.  So far no problems when actively writing to or reading from drive.  Apple tech support tries zapping PRAM, didn't help.

     

    Anyone come up with a solution?  Or even a cause?

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