I have a problem with my external HDD from Seagate. It was working fine and I was transferring files from it to another external SSD on my MacBook Air (running macOS Monterey). However, the battery on my Mac was low and it turned off midway. After reconnecting, the trouble started. One partition which is used for time machine is not mounting anymore, though it can be seen in
diskutil list and Disk Utility. The other two partitions are mounting and I can see the files but they cannot be unmounted. The disk is also not ejecting and I have to just disconnect the usb cable every time. I have tested the HDD with another Mac but the issues remain.
diskutil list gives:
Apple$ diskutil list /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *121.3 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_APFS Container disk1 121.1 GB disk0s2 /dev/disk1 (synthesized): #: TYPE NAME SIZE IDENTIFIER 0: APFS Container Scheme - +121.1 GB disk1 Physical Store disk0s2 1: APFS Volume Macintosh HD - Data 85.2 GB disk1s1 2: APFS Volume Preboot 591.9 MB disk1s2 3: APFS Volume Recovery 1.6 GB disk1s3 4: APFS Volume VM 1.1 GB disk1s4 5: APFS Volume Macintosh HD 15.2 GB disk1s5 6: APFS Snapshot com.apple.os.update-... 15.2 GB disk1s5s1 /dev/disk2 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk2 1: EFI EFI 209.7 MB disk2s1 2: Apple_HFS time_mach2 203.0 GB disk2s2 3: Apple_HFS what_toDo 203.1 GB disk2s3 4: Apple_HFS things_kept 593.5 GB disk2s4
I have tried out all the suggestions given in the post External drive does not mount after plug off without eject but to no avail. Results of
mount with or without readOnly for the different partitions are:
...Apple$ diskutil mountDisk /dev/disk2 One or more volume(s) failed to mount ...Apple$ diskutil mount /dev/disk2s2 Volume on disk2s2 timed out waiting to mount ...Apple$ diskutil mountDisk readOnly /dev/disk2 One or more volume(s) failed to mount ...Apple$ diskutil mount readOnly /dev/disk2s2 Volume on disk2s2 timed out waiting to mount ...Apple$ diskutil mount /dev/disk2s3 Volume what_toDo on /dev/disk2s3 mounted ...Apple$ diskutil mount /dev/disk2s4 Volume things_kept on /dev/disk2s4 mounted
Operation times out if I try to unmount the mounted partitions (
unmountDisk gives the error
Unmount of disk2 failed: at least one volume could not be unmounted. An attempt to eject the disk also fails.
Next I checked whether
fsck is running:
Apple$ ps aux | grep fsck root 1058 59.7 12.6 34676988 1053428 ?? R 2:59PM 18:01.42 /System/Library/Filesystems/hfs.fs/Contents/Resources/./fsck_hfs -y /dev/disk2s2 Apple 1165 0.0 0.0 34122828 836 s000 S+ 3:36PM 0:00.00 grep fsck
Everything remains unchanged even after killing
sudo pkill -f fsck. First Aid in Disk Utility also does not work.
All this could have been avoided if I had plugged the charger on time. But now that the harm has been done, can you please suggest any solution? I hope this is solvable. The problematic partition
\dev\disk2s2 contains my time machine backup of three years. Thank you for any help.