The Mac mobile hard disk cannot be used/mounted and an error is reported
cause of the incident
When plugging in the mechanical hard disk before, I forgot to unplug it before shutting down, resulting in a direct power failure of the mobile hard disk. I tried the win computer and found that the hard disk was not damaged. It can be recognized but cannot be displayed or operated when plugged into the MacBook. Enter the settings to report an error on disk loading.
loading/first aid
Startup Disk -> Disk Utility
can perform first aid and mount
terminal loading
Enter the command in the terminal to mount the mobile hard disk
Step 1: Connect the mobile hard disk to the Mac computer and open the [Terminal] on the computer.
Step 2: Enter the following commands, and press the [Enter] key every time you enter a command.
- Enter [diskutil list] to list the disks in the computer, and then determine the disk number according to the disk capacity or disk name and other information.
- If you confirm that the number of the mobile hard disk is [/dev/disk1] (please replace the hard disk number according to your actual situation), you can enter [sudo diskutil mount /dev/disk1] to mount the hard disk.
- If the loading fails, please enter [ps aux | grep fsck] to check whether the fsck process list pops up. If so, please enter [sudo pkill -f fsck] to kill all fsck processes, and then enter [sudo diskutil mount /dev/disk1] or unplug the hard disk and reconnect it, then the mount will be successful.
Generally, this step can solve most of the problems that the mobile hard disk cannot be loaded. If it still cannot be solved, then the mobile hard disk may be damaged or not formatted correctly. You need to use the [First Aid] and [Erase] functions of Disk Utility to deal with it. However, these two methods may damage or erase the data in the hard disk, it is recommended to back up in advance.
What is the fsck process
reference link
CSDN: How to repair the mobile hard disk that cannot be mounted on Mac?
Reneelab: How to repair the mobile hard disk that cannot be mounted on Mac?