Mac Mini disk not ejected properly error.

Discussion in 'Mac Basics and Help' started by Dave_O, Nov 18, 2018.

  1. Dave_O macrumors newbie

    Joined:
    Nov 16, 2018
    #1
    Just got a Mac Mini (2018) after using a Windows PC for a long time. It has a Samsung T5 external SSD, connected via the USB-C / Thunderbolt port, and was erased and formatted with APFS. No Samsung drivers or software was installed. Sometimes when the Mac wakes up, I get a Notification that the disk was not ejected properly. Checking or unchecking the Energy Saver setting about putting hard disks to sleep has no effect.

    There does not appear to be any files system issues. Is this the norm, or does it indicate a correctable problem?

    Thanks.
     
  2. Velin macrumors 65816

    Velin

    Joined:
    Jul 23, 2008
    Location:
    Hearst Castle
    #2
    Sounds like you're doing everything correctly. I've seen this error with both Win10 and OSX machines. It generally is an issue with the way the disk manufacturer and Apple/Windows are implementing the USB-C spec, and right now everything's a mess across all platforms. Could also be your Mini isn't sleeping, but the external drive is, and the Energy Saver setting is having no effect on your T5. I'm not sure how to change that, and it would seem to me the disk manufacturer would want your T5 to rest/sleep to lessen power use and prolong disk life.

    Another thought: are you using a powered USB hub? I've found powered USB hubs are way better for connecting drives and peripherals across Win10 and Apple desktops, with far fewer errors. I wouldn't go and spend money on one, but, if you have one lying around, maybe try plugging your T5 into the powered hub (and obviously the hub into your MacMini). Just that little bit of electricity to the hub could make a difference. Longshot, yes, but worth it if you have the powered hub lying around.
     
  3. gigatoaster macrumors regular

    gigatoaster

    Joined:
    Jul 22, 2018
    Location:
    Singapore
    #3
    Hello

    Is this happening only when Mac wakes up or totally randomly? Because on my brand new Mac mini, I had the same issue. My HDD is now dead: he works only on USB 2.0, I spent 10 hours on Sunday to back-up using my old MBA from 2011 the data and bought 2 HDD for 248 SGD.
     
  4. Velin macrumors 65816

    Velin

    Joined:
    Jul 23, 2008
    Location:
    Hearst Castle
    #4
    There have been some reports resetting the SMC has solved the external HDD ejection issue with USB 3 ports. Don't know if that applies to USB-C, but may be worth researching.
     
  5. chscag macrumors 68030

    chscag

    Joined:
    Feb 17, 2008
    Location:
    Fort Worth, Texas
    #5
    I've got that same SSD (512 GB model, formatted to APFS) attached to my 2017 5K iMac's USB-C/TB3 port and use it for my CCC backups. However, I do not leave it attached to the Mac but eject it after the backup is done. I'll have to experiment and keep the drive attached when I put the Mac to sleep to see if I'm getting the same error.
     
  6. Dave_O thread starter macrumors newbie

    Joined:
    Nov 16, 2018
    #6
    Thanks for the help. So far, the notification happens only once or twice a week, not every time the sleep / wake cycle occurs. APFS is supposed to very resilient to corruption, and the Mac is on a UPS. I think I'll treat it as a minor annoyance at this time.
     
  7. gigatoaster macrumors regular

    gigatoaster

    Joined:
    Jul 22, 2018
    Location:
    Singapore
    #7
    Hello

    Have you checked any error messages in the console? Did you run a diagnosis on the hard disk and do you have the possibility to try a day or 2 on a new machine?
     
  8. Dave_O thread starter macrumors newbie

    Joined:
    Nov 16, 2018
    #8
    Disk first aid shows no errors. Apple support recommended installing Samsung drivers as the SSD’s controller may need special sequencing when the Mac sleeps. I did the install, things seem fine, speeds as before.
     
  9. Velin macrumors 65816

    Velin

    Joined:
    Jul 23, 2008
    Location:
    Hearst Castle
    #9
    This issue notwithstanding, I think you'll be quite happy with the Mac Mini and OSX Mojave, and the new APFS file system. It's robust and is quality software. Much preferred to Windows 10, especially once you get used to it.
     
  10. Dave_O, Nov 19, 2018
    Last edited: Nov 25, 2018

    Dave_O thread starter macrumors newbie

    Joined:
    Nov 16, 2018
    #10
    So far, I completely agree. I actually have not used the PC since I got the Mac operating. More than that, I moved from Chrome to Safari for browsing, except for reddit (no RES). 2FA texts from my iPhone sync to the Mac automatically and auto fill the response field in Safari.

    Thanks for the help.
     
  11. Dave_O, Nov 25, 2018
    Last edited: Nov 26, 2018

    Dave_O thread starter macrumors newbie

    Joined:
    Nov 16, 2018
    #11
    Update -

    The disk eject notification appeared again, resuming from sleep overnight. I used the uninstall script provided to uninstall all Samsung software and drivers. No other symptoms except the notification.

    Talked to Samsung support, who said that the behavior is normal. To prevent the issue they recommend ejecting the volume before sleep. Then, either unplug the disk and insert it after the Mac wakes up, or restarting the Mac after it wakes up to mount the volume again.

    The Samsung drivers are only needed if you use Samsung’s built in encryption.
     

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