Once youve gone through the checklist and the error still appears, then proceed with the steps below. Recover files from one volume to another on the same Drobo? After you have done this fix, you should observe if this error will show up again if you start and stop a specific process. Read on. Where does the version of Hamapil that is different from the Gemara come from? Might be that it occurred after a reboot, I usually never reboot my Mac. MacBook-Pro:~ UserName$ diskutil verifydisk disk2 Disk first aid takes a loooong time on larger drives. OS Version Info Episode about a group who book passage on a space ship controlled by an AI, who turns out to be a human who can't leave his ship? It indicates that there are some problems on the drive or macOS, making the disk even cannot be mounted by the Mount feature in Disk Utility. I opened Disk Utility and run first aid on it and got an error (com.apple.DiskManagement.disenter error -119930878.) 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. Download and try Outbyte MacAries right now to see what it can do for your Mac. That's because they format the drive on Windows but for cross-platform use. When calculating CR, what is the damage per turn for a monster with multiple attacks? You may also have a lot of apps running in the background using up the resources macOS needs to properly recognize and mount your drive. Surprisingly First Aid didn't show any errors, but still I couldn't mount it. (com.apple.DiskManagement.disenter error 49244.) Dont worry well show you how to get rid of this pesky error in the next section. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? 2: Apple_APFS Container disk1 1.0 TB disk0s2 As long as there are people writing the code, there will always be the human error factor. When there's a logical error in the process of mounting, the hard drive refuses to be mounted. I unplugged an external HDD without ejecting it first,then had error 49218 when trying to mount it.