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Q: "Disk Not Ejected Properly" error after EL Capitan goes to sleep and wakes up again.

Hi, community.

 

On public launch day, I upgraded my Macs (Mid 2010 MacBook Pro 15", Mid 2012 MacBook Peo 15", Late 2011 MacBook Air and a Mid 2010 Mac Pro) to OS X El Capitan. In general terms, the upgrade process went smooth.

 

But, I've been presenting an annoying problem:

 

Each time any of my computers go to sleep, if they have an external hard drive connected to an external USB Hub (unpowered), they present a "Disk Not Ejected Properly" error after they wake up again.

 

I didn't have any of these issues with Lion, Mountain Lion, Mavericks nor Yosemite! Only now, when I upgraded to El Capitan, things are getting annoying.

 

Does any one else present the same issues and, do you have a solution to this problem.

 

Thanks for reading.

MacBook Pro, OS X El Capitan (10.11)

Posted on Oct 2, 2015 9:38 PM

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Q: "Disk Not Ejected Properly" error after EL Capitan goes to sleep and wakes up again.

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  • by baasdied,

    baasdied baasdied Nov 4, 2015 5:44 AM in response to davidra
    Level 1 (4 points)
    Nov 4, 2015 5:44 AM in response to davidra

    The issue hasn't occurred anymore since I attached the drive directly to my MBP, but this doesn't seem to be a fix for others.

    Strangely, I was at my father this weekend and he has a mac mini with 10.10.4 and he had the same issue for a while (also a Western Digital Elements connected directly to his mac mini), so it doesn't seem to be limited to El Capitan.

  • by davidra,

    davidra davidra Nov 4, 2015 5:49 AM in response to baasdied
    Level 1 (0 points)
    Nov 4, 2015 5:49 AM in response to baasdied

    My drives have always been connected directly to the iMac without a hub, so it's not that. And it may not be solely due to El Capitan, but in my case, with my drives and setup it actually is, since I have been using these drives for years on earlier OS's and never had this problem until the day I updated to El Capitan.

  • by iSamNC,

    iSamNC iSamNC Nov 8, 2015 1:42 AM in response to goye
    Level 1 (0 points)
    Nov 8, 2015 1:42 AM in response to goye

    +1 for SMC reset.  My Retina MBP started doing it after upgrade. I use a PNY Storedge to keep my photos on and it would complain every time it would wake up. Did the SMC reset a couple days ago and so far it's not doing it any longer.

  • by David Cowling,

    David Cowling David Cowling Nov 9, 2015 12:48 PM in response to davidra
    Level 1 (20 points)
    Nov 9, 2015 12:48 PM in response to davidra

    Ditto. And the SMC reset didn't work for me.

  • by davidra,

    davidra davidra Nov 9, 2015 12:54 PM in response to David Cowling
    Level 1 (0 points)
    Nov 9, 2015 12:54 PM in response to David Cowling

    SMC didn't work here either. I have noticed that it's not EVERY night that I get the DNEP errors. And one time, I got errors for both drives, and one didn't reconnect automatically. Then the last two days it hasn't happened at all....mystifying. At least for a while it was consistent.

  • by David Cowling,

    David Cowling David Cowling Nov 9, 2015 1:02 PM in response to davidra
    Level 1 (20 points)
    Nov 9, 2015 1:02 PM in response to davidra

    I've simply disconnected the power from the drive and boot it up from time to time to perform TimeMachine backups, if I can remember to do so. Not exactly a foolproof backup strategy.

  • by nosha siemers,

    nosha siemers nosha siemers Nov 16, 2015 12:26 PM in response to goye
    Level 1 (0 points)
    Nov 16, 2015 12:26 PM in response to goye

    SMC reset did nothing for me

    2012 era macbook air

    StorEDGE SD card

  • by iSamNC,

    iSamNC iSamNC Nov 17, 2015 10:32 PM in response to iSamNC
    Level 1 (0 points)
    Nov 17, 2015 10:32 PM in response to iSamNC

    Update to this.  It seemed that the SMC reset fixed it but what actually fixed it was that when I rebooted my machine from the reset I didn't start VMWare Fusion.  I've now found that any time I have a Windows VM running I have the problem.  If I suspend or shut down the VM before the Mac sleeps the problem goes away.  So at least in my case it's a VMWare issue.  I'm running VMWare Fusion 7.1.3 (3204469)

  • by Acumowchek,

    Acumowchek Acumowchek Nov 18, 2015 8:25 AM in response to goye
    Level 1 (5 points)
    Nov 18, 2015 8:25 AM in response to goye

    Add me to the list. One week old 5K Retina 27" iMac. The only difference for me was having to switch to USB instead of FireWire, connected directly to the iMac.

    Tried the reset, but this morning I had a dozen notifications saying disk was not ejected properly. It must be connecting and disconnecting all night.

  • by jaypea89,

    jaypea89 jaypea89 Nov 23, 2015 6:43 PM in response to goye
    Level 1 (0 points)
    iPhone
    Nov 23, 2015 6:43 PM in response to goye

    Same here. 27" iMac. External hard drives seem to be OK even after getting the "Disk Not Ejected" notification, but the SD card that contained the photos I was editing is completely erased. It basically formatted it after it fell asleep and will not mount until a restart. I should be able to recover using DiskDrill but still, this needs to be addressed.

  • by mathfrank,

    mathfrank mathfrank Dec 1, 2015 4:52 PM in response to mathfrank
    Level 1 (0 points)
    Dec 1, 2015 4:52 PM in response to mathfrank

    Just to update things, I am still having the problem.  I have tried all the things suggested above, except shutting down/suspending VMWare.  I have Ubuntu installed on a VM and I am hoping that is the problem (although I always suspend my VM before shutting down...). I've run diagnostics from WD on the drive, and confirmed that my drive's firmware is updated and no problems have shown up.  Here's hoping that a fix for this is discovered!

  • by iSamNC,

    iSamNC iSamNC Dec 2, 2015 2:52 AM in response to mathfrank
    Level 1 (0 points)
    Dec 2, 2015 2:52 AM in response to mathfrank

    I finally got a complete work around.  The interaction of VMWare Fusion and El Capitan causes issues with USB 3.0.  I changed the advanced settings on my VMs to work as USB 2.0 and haven't had the issue since then.

     

    HTH..Sam

  • by NickAvallone,

    NickAvallone NickAvallone Dec 6, 2015 10:13 AM in response to iSamNC
    Level 1 (5 points)
    Dec 6, 2015 10:13 AM in response to iSamNC

    I've got the same issue here on my mid-2010 MBP with a WD MyBook external drive. I'd had the issue in Mavericks & Yosemite, and it's actually gotten worse under El Capitan.

     

    A quick Force Sleep used to reset the external drive connection; after waking up from overnight or whatever, I'd do a quick Force Sleep, and the external drive would come back online.

     

    But now after waking up, my computer gives me the "Disk not ejected properly" message, and the Force Sleep trick no longer works, so there is no way to access the external disk at all: MyBook is powered up but my MBP won't recognize it. So I turn it off and back on. Then MyBook boots up and shows up briefly in Finder --- until El Capitan realizes that it was shut down improperly, and kills it again. It's maddening.

  • by mathfrank,

    mathfrank mathfrank Dec 6, 2015 12:36 PM in response to NickAvallone
    Level 1 (0 points)
    Dec 6, 2015 12:36 PM in response to NickAvallone

    I have posted a couple times in this thread and I finally just gave up and tried a new external hard drive.  Similar to the previous poster, I also had a WD MyBook External Drive (4TB Metal Enclosure) and I think it has failed on me.  It took many attempts to copy the data from one HDD to another, with the drive completely disconnecting in the middle of copying data regularly.  My new drive is a Seagate Backup+ 5TB and I have had no errors so far.  I will continue to update this thread if any drive drops occur.

  • by David Cowling,

    David Cowling David Cowling Dec 9, 2015 9:21 AM in response to mathfrank
    Level 1 (20 points)
    Dec 9, 2015 9:21 AM in response to mathfrank

    It looks as if 10.11.2 has fixed this issue...

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