Diskmanagement.disenter error 49218

Hello everyone,

I'm having a little issue with mounting my external hard drive lately. I've tried quite a few methods in hope of getting it to work again, but so far, no luck. I hope someone can help me solve this issue, or those who have the same problem may also share your insights.

My external hard drive was working fine about a week ago. But one day, I ejected the hard drive and the icon disappeared, so I thought it was safe to unplug it. When I did, it said the hard drive was not properly removed. It still works fine when I use it the next day, but the same thing happened. It said the drive was not properly removed after I ejected the drive, waited for the icon to disappear, and then unplugged the drive. After that, it never works again, and the attached images are the info I got when I tried to mount or run first aid on this drive.

Please help & thank you in advance!

Computer: 27" iMac - MacOS Monterey

External Hard Drive: WD_Black 4TB. APFS encrypted

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Posted by
QS49218
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  • I have the same problem. External SSD drive for Timemachine, APFS formatted. Creating the initial backup worked, then was running for some time and all of a sudden it can't be mounted anymore. Might be that it occurred after a reboot, I usually never reboot my Mac.

    The same external drive was working before Monterey smoothly for over a year. After the update the Timemachine backup could not be finished because of some strange file conflict. Whatever, I reformatted everything and started from scratch and now I am in this new situation.

    I think there is a sever bug somewhere in Monterey.

    —
    gnaegi

  • Same problem. External SSD for Time Machine, APFS formatted. Lost access with Monterey and can't get it back.

    I did find this:

    https://developer.apple.com/forums/thread/680500?answerId=676624022#676624022

    Not formatted in ExFAT (APFS), but after entering command was prompted for password but had no ability to enter ($ sign was pre-entered.)

    —
    anotherapplefan

  • Same problem. Thanks a lot Mac Monterey. Now I can not access my files.

    —
    kiramau

Replies

Same issue with my drives…. I had an external drive for my pictures and I could not access it. I tried saving it through terminal with all the commands i could think of…. Nothing really helped. In the end i capitulated and bought „Disk Drill“ to access my files.

Then i loaded all the pics on a new external drive and about two weeks later the same error happened. I am afraid, Monterey has a weird bug.

Posted by
Yur92
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  • did you solve the problem???

    —
    emanueleagostini_

  • same question - how did you fix it?

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    skogarfoss

  • I have the same issue under BigSur 11.6.2 so it's not a Monterey specific bug.

    —
    Addle

FIXED - NOW I'M GOING ***** 😁

Posted by
Pixalab
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FIXED ... by doing WHAT? Please post a solution to this problem if you could fix it.

Posted by
Schokolado
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  • 找到找回数据的解决办法，我的情况是是博主情况是一样的。4T外接USB移动硬盘,进行了APFS加密。插入macbookpro无法装载。在磁盘管理点装载提示4928错误。急救也是错误。我的解决办法是用windows系统。接上4T外接移动硬盘。网上安装apfs from windows这个工具。就能找到盘了。转入加密密码就可以看到磁盘上面的文件。但是只能读取不能写入。就把里面的文件全部拷出来。再进入macos系统用磁盘工具格式化后再把文件拷进去就可以了

    —
    samonline
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I had this happen 4 TB WD My Passport on Big Sur 11.6.2, the 1 TB partition for my Time Machine didn't come up and mounting gave the "disenter error 49218". Here's what worked for me (at least for now):

https://developer.apple.com/forums/thread/680500?answerId=676624022#676624022 "Try to mount the disk, and switch to Terminal and write sudo pkill -f fsck"

Attempted to run First-Aid on that partition.

Restarted the computer.

Time machine came back after that. No clue which of the steps may have actually fixed it. Will find out the next time that this inevitably occurs.

Posted by
HeCardReadGood
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  • The same problem occurred right after I updated to Monterey. Where/what is Terminal. I don't even know where to look for it. Thanks for any help.

    —
    mardicar

  • The Terminal is an always installed application on your Mac. You can find it very easy by typing Terminal into the spotlight search.

    —
    Noxmain

  • This really helped. Thank you.

    https://developer.apple.com/forums/thread/680500?answerId=676624022#676624022 "Try to mount the disk, and switch to Terminal and write sudo pkill -f fsck"

    —
    crazyFlip
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This worked for me too:

https://developer.apple.com/forums/thread/680500?answerId=676624022#676624022%C2%A0%22Try to mount the disk, and switch to Terminal and write sudo pkill -f fsck" Attempted to run First-Aid on that partition. Restarted the computer.

Posted by
MagPieTheFirst
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  • Unfortunately not for me

    —
    Pipobike
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I agree it's a weird bug with Monterey. I ran into the same issue with my external Samsung 4TB SSD. After I upgra ded to Monterey my drive immediately started acting weird and then I received this message "Could not mount “4TB SSD”. (com.apple.DiskManagement.disenter error 49218.)" I've tried all kinds of software including Terminal to force mount and I'm still unable to mount this external drive. I have over a decades worth of family photos in iPhoto on this drive most likely all lost. Thanks MacOS Monterey!

Posted by
xsox1951
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  • try opening Disk Utility, right-click on the drive and click on Run First Aid and leave it to run till it finishes. It might fix it for you.

    —
    geneowak
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I unplugged a 1TB SSD without ejecting it first, and when I connected it again sometime later, I couldn't even see it in Finder.

I opened Disk Utility and run first aid on it and got an error (com.apple.DiskManagement.disenter error -119930878.) but after I closed it, it continued running and some minutes later, the drive was fixed and I was able to see it in Finder and use it again.

I'll remember to eject the drive properly next time before unplugging it.

Posted by
geneowak
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  • hi, I'm going through the same situation but I can't find a solution to mount my disk.

    —
    Josetale
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I unplugged an external HDD without ejecting it first, then had error 49218 when trying to mount it. Surprisingly First Aid didn't show any errors, but still I couldn't mount it. Restarting the MacBook helped, it just automounted. I'm on Big Sur.

Posted by
thirstydog
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  • I had the same experience as thirstydog, using the latest Big Sur. First Aid did not show any errors, but it auto mounted fine after restarting the MacBook Pro. I am using an Apple Thunderbolt to FireWire Adapter on a MacBookPro11,3.

    —
    DBris

  • I have the same issue on iMAC 27' 5K running Monterey.

    Used to have multiple external hard drive hooked up to my USB ports, now cannot do this.

    As a professional photographer this is death for me. I can no longer upload my photographs to my MASTER external drive then edit them to a seperate external drive to deliver to the client.

    I tried going into terminal. I tried turning off the MAC disconnecting power and waiting then reconnecting USB devices. I tried disk first aid.

    I have over 30 external hard drives ranging for 1 TB to 14 TB and I'm going CRAZY!!!! HELP

    —
    KissMyKite
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Restarting the MacBook worked

Posted by
Dan-M
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  • Not for me. This is most probably (99.99%) an issue to be fixed by Apple’s macOS developers.

    —
    Pipobike
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Ok, I had this same issue and found a fix. However, it's ONLY a fix if you do not care about what is on the external HDD. Open Disk Utility and hit Partition. Change it to APFS (Encrypted). I hit "Apply" and it warned me that all data would be deleted. I said ok. It wiped it and then it automatically mounted and all is well now.

Mine was previously on APFS (case sensitive) and I had all of the same issues you all have had and none of the suggested fixes did not work.

Posted by
SamSplain
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  • are you kidding me? you're just saying "erase all"

    —
    voyou9se
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FIXED! I've had trouble accessing my external LaCie time machine drive for a while now and nothing I had found online has helped. Couldn't mount it, erase it or use first aid on it. Would get failed messages non stop. The only solution that has helped I have, fortunately, found was by this guy on youtube, https://www.youtube.com/watch?v=Z9y1oRYlmh0. Formatting the container within the disk utility to a MAC OS Journaled had worked and I was able to access the partition anew and then restart the time machine.

I am no developer, but was reading these forums and thought of posting this in order to, maybe, help some of you.

Posted by
jgrosinger
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  • That does actually fix nothing. Next time you unmount and try to mount again, you face most probably the same problem.

    —
    Pipobike
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I'm having the same problem with my MacBook Pro M1 max. I have a 2TB external drive I was using with Time machine backups that I can No longer mount. Even disk utility won't allow the disk to be erased and reformatted. I would have thought that apple would have the solution by now seeing how so many have encountered this problem. can someone please help????

Posted by
thebasmen
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  • Same.Have you solved the problem? I have a lot of important videos on the external hard drive and I can't format it. Let me know if you have a solution

    —
    szwu
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I've seen all the post on how to regain access to the disk, but how do I do that without erasing and loosing all my Time machine backups?

Posted by
thebasmen
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Same Problem here, it happened after the MacOS firmware update to 12.4... I use an external WD hard drive, APFS (encrypted). Already conacted the Apple and WD support, they couldn't help me

Posted by
Killidim
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I'm having the same issue...

Posted by
AngeLorraine
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