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

Excellent. Great idea @roman127. I need to reverse back to Mojave and see if it would work. It is a pain because I just got back to Catalina from X Lion. I think I will try a time machine method to backup this computer.

Running OS Catalina on a new MacBook Pro. I just had a drive fail on me (WD 2TB) after mounting quickly for the past 24 hrs. Did not eject it manually - literally the drive unmounted itself while I was adding a Word document to it for backup. Other drives I own work fine (WD and Seagate), I could open the drive great on a windows PC, and a recovery app found the documents while loaded onto the problem Mac. The fsck command was not running in background, per activity monitor. So now I'm recovering my recovery drive on a second backup until this temper tantrum fixes itself.

I don't think it's just a Seagate thing, this definitely seems like a Catalina thing.

I need to try in on Linux then...i have tried all options even thinking to reformat the drive and then restore the files but then i know there is a possibility that i wont be able to rescue the files or just jpg files will be rescued (i want my RAW files) paying to fix my drive is not an option.. frustrating and thinking it has something to do with Seagate wanting more cases to fix with the pixel8. Or apple not supporting seagate older drives. Just so many theories!

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 ?



It has a 15 dial free trial, but:

I'm not saying it won't solve someone's problems, but it didn't solve mine (same error encountered on ext drive like OP). It just returned: Error while mounting disk2s3: No supported file system found.

...No loss of money, but a waste of time.

I have a 5T WD drive that's already been formatted for a Mac, therefore EX-NTFS. Did you have any issues after downloading Tuxera? I'm having the same problems everyone else is with mounting. I get com.apple.DiskManagement.disenter error 0

Thanks for your help.

I see. So on the first window, the type for the External drive is Disk. The type for the actual drive, under that is USB External Physical Volume, neither of which, I believe, is one of the types you can do a mount on in Terminal. So, it's not NTFS or FAT32, as far as I can see.

Correct me if I'm wrong, but I don't believe that data is helpful for mounting the drive or other drives like it.

I have the same problem. My system just updated to Catalina 10.15.3. My main HDD worked fine until the update completed and the computer rebooted. It is now disabled and nothing is bringing it back. Quite upset, as I am now running off of the much smaller fusion SDD, and appear to have lost access to all my data stored on the HDD.

This is a software issue, not a hardware issue.

You've not lost your data if you have a backup strategy in place, like Time Machine. Also the install process may have put a strain on the HDD portion of the Fusion drive during formatting and installing. It didn't happen to me but then, I didn't have a Fusion drive. I don't remember if most of the occurrences of this type of problem were Fusion drive related but maybe. In any case it's not good but with a backup strategy in place you won't lose any data.

I have many important files in the error hard disk, so I try to use another mobile hard disk to restore data from the error hard disk. When I clicked the restore from Disk Utility, the error hard disk is OK. And now my Mac is booting. FK APPLE

I am trying to mount a micro SD for my Go Pro. If I format it using the Camera it will not mount. If I format using disk utility it will not work in the Camera I get an error code (com.apple.DiskManagement.disenter error 49223.) I am currently running Catalina

Suddenly with no reason MyBook Duo 16TB does not mount anymore.

Disk Status from WD Utilities seems fine, but does not auto mount anymore, if I try manually get this error:

Could not mount “disk3s2”. (com.apple.DiskManagement.disenter error -119930868.

Attached status. There is no disk check in progress, I waited the full night. What it can be?

I've several HDD's of different brands and sizes. Until I had the 17" MBP, non things happened to me fo years. After buying the new 16" with Catalina, it happens about once a month that one of my HDD's can no longer mounted, as if it were broken. But they are not broken...; all broken ?

HDD's are formatted with Mac OS Journaled (no code). After that error (49244) I have to recover the files with DiskDrill, reset the disk and go on....

But it is impossible that happens every times, to different HDD's !!

I tried to changed the usb-hub with a new direct dedicated cable...but it's the same.

It's a Catalina bug (10.15.5). Now I tried to initialize with APFS...Let see what happens.

Does anyone have any suggestions ?

Thanks! I've never worked with codes, never even launched Terminal. Your instructions, though, make it seem like something I could handle. I'll try it out next time I get that 'disenter' error message. Much appreciated.

I'm having the same problem as Bill Canada.

The thing is that I have spent the last 2 weeks formatting and reformatting drives. I actually bought a new computer to transfer more quickly! (My mid 2010 MBP with Yosemite didn't have the muscle to reformat in a reasonable amt of time.)

The drives are 5TB WD Easystore drives I'm working with, and I'm formatting in ExFAT to be compatible with Playstation gamesystems.

I switched from SiliconPower to WD because of the great ratings. I haven't revisited that SP drive because it's smaller than the WD drives. It's commonly known that ExFAT is less stable and slower than Apple's preferred language. Bigger drives also mean more things can go wrong. Seriously though: every time a drive has been accidentally unplugged I have had to completely reformat the drive, and that seems a bit excessive. I didn't have this problem with my 32bit mid2010MBP using Yosemite, and I hate to admit how many times that 2TB SiliconPower drive had been accidentally unplugged from it not having any problems for YEARS. I'm wondering if the bit size leaves more room for things to go wrong? (Kind of like 3G vs 4G vs 5G: more compressed wavelengths or something?)

I'm chasing a deadline here, and when you pay thousands of dollars for new tech, you hope it would work. I haven't called AppleCare yet, but if it's an external drive problem, that's not their problem. I hope people are troubleshooting Catalina and can find a way to bootstrap the processes, so that these frequent wipe/reformats aren't necessary. I have been an apple user for over 10 years now and freaking love the intuitive design of most of their products. Microsoft is worse, no way I'm going back. I don't want to learn Linux and open source culture, so much work--so much time.

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Oh wait... now after 1 hour of drafting this searching for trouble shooting options, etc. (with the drive still plugged in) it decided to suddenly recognize it, mount, and populate the icon on the desktop.

I did nothing to it to cause this--it just took time (an engineer's nightmare: no process, no evidence).

I'm going to create a backup now. This is nerve-racking. Please find a way to bootstrap this process!