An external disk refuses to mount, com.apple.DiskManagement.disenter error -119930868.

I have this issue too, but I have it with FOUR drives that are part of a JBOD "Raid" setup. All four will mount properly when plugged into a different Mac, and the Raid works perfectly, but NONE of them will mount on my main machine. These are empty freshly formatted drives put into a JBOD to make it big enough for a Time Machine backup. To me, there is only one word to describe this situation.

PATHETIC.

Apple really needs to get their act together, when it comes to disk management.

The solution I received from mikefromwhitchurch back on 5/8/21 worked for me. My drive is partitioned and 1 segment showed up but Timeline would not mount.

I ran his solution and then used First Aid on the drive. It took several hours (5+) to recover probably due to the amount of data but I’d expect newly formatted drives should take much less time. Give it a try, and run overnight if need be.

Good luck!

Booted up my machine this morning. YET ANOTHER external SSD has now been affected, this time a Samsung T5. This brings the count to SIX drives, and means that it has hit all but ONE of my external drives. At this stage, I hardly have any data on external drives. I've moved ALL stored data to my NAS.

Am now making sure all my backups are up to date (since Time Machine no longer can be relied on) and putting things in place to abandon the Mac platform for good, as I can't afford to waste time fixing and working around stupid bugs that Apple can't be bothered fixing.

****, we're 2 years further and there is still no answer from apple on this!

I'm having the same issue and did everything that is suggested in this thread, but it's still not working. Apple where u at?

identical case following the OS update (Mac Big Sur version 11.5.2 , the external USB disk appears to be detected at the hardware layer but indicates incompatibility, disk aren't mount. issu to solve the case or just a downgrad OS ?

disk management caption

information system

Did you ever find a reason as to why it is doing it? Mine will not stop and I have all of my work on an external. One person stated it wont quickly mount as it could have been removed without being properly ejected. If this was the case, then my SD cards that I consistently forget that my LR hasn't ejected, wouldn't mount as fast. My externals are the only ones that don't mount quickly. Two in particular. I am really getting frustrated as I don't know how to make it stop. I can't access my drive right now and its been 10 minutes. And randomly in the next 30 min it will mount. I'm so grateful I have everything backed up on a non-apple server because this is insane.

I'm having the same issue and I've tried everything. I have a WD 14TB drive with original RAW files for our photo studio and we can't access them. Everything worked fine and then two days ago the MAC will not recognize external drives.

• Did reboot
• did reboot with disconnecting power
• Tried to mount through MAC and WD utilities.
• Disk Utility sees the disk and running a Disk Check / First Aid it comes back good
• 
  
• 
  

Nothing has worked with me. I tried all the solutions listed here except the one from activity monitor because I couldn’t find fsck_ext, I searched & nothing appear. I tried going into safe mode and I can see my drive and mount & unmount it but again didn’t work. Any new ideas?

Hi friend. I had your problem and since I saw your comment I searched for like 3 or 4 days and finally I found the solution:

Go to www.Tuxera.com and download it for mac.

After installation , your mac will restart. after that you're good to go.

Just plug your Hard Drive in and use it.

Simple as that

It worked for me. Hope it works for you too.

Ok so its been a week since i pressed the "i have this problem too button"

i spent most of my days not being able to write on the disk only read it and last night i tried to repair the disk again in disk utility. it didnt seem to do anything but this morning i noticed it finished the process and i pressed mount and it worked.

Sharing & permissions changed to " you have custom access". what i want to say is ease us and tuxera didnt do anything or the western digital discovery. The only thing that worked was my patience.

Yesterday I connected my device external hard disk and it seems it doesn't work anymore ore both in Pro than in MacBook Air after upgrading in Catalina 10.15.2. Now I checked trying through the utility to verify if the computer reads the hard disk and it is the message I received "com.apple.DiskManagement.disenter errore 49217" how Can I restore the problem ?

what does it mean ?



sorry, upper left hand portion of the disk utility screen.

Are you sure that command is with an ‘s’? Seems to a ‘u’ is more appropiate.

First, thank you for the response. Ok, did that and now I get the message:

I checked the external drive and now I cannot save to it. Any suggestions instead of backing up and reformatting?

😂