Could not mount “DEVEN”. (com.apple.DiskManagement.disenter error 0.)
MacBook Air 13″, macOS 12.7
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User level:
Level 1
4 points
Posted on Dec 17, 2019 5:37 PM
I ran into this issue with a Western Digital 2TB drive... I had seen some irreperable disk errors and was ironically, attempting to back the drive up so I could reformat it... so, I was panicking because I've got some important data on the drive and was starting to research data recovery tools. After messing around and doing some research, I discovered the system was trying to run a filesystem check on it and was getting hung up.
I opened a terminal window and entered the following commands
$ ps -ef | grep fsck
$ sudo kill [pid from above]
BAM! Disk mounted just like that.
At this point, I opened Disk Utility and ran First Aid... which ironically unmounted the drive and then got hung up again... DUH! So had to repeat the process. At this point, with the drive mounted, I backed up the drive and reformatted it.
Hope this helps.
Basically means the drive is seen as possibly having problems.
Open Activity Monitor in Utilities, View>All Processes, sort on Name, see if fsck is running, if so force quit it.