I have been trying to use an APFS partitioned Samsung T7 shield 2 TB for a couple of weeks now but keep running into the same issue. After a few days of use, one of my partitions will no longer mount.
OS version: macOS Big Sur 11.7.4
- All SSD partitions formatted as APFS
- 1 TB allocated to file storage (archival)
- 700 GB allocated to a Time Machine partition
- 300 GB allocated for files in use at the moment (i.e. audio, video, documents etc)
The 300 GB Partition has been excluded from the time machine backup however the 1 TB partition is included in the backup.
Partition details (the one that is currently not mounting):
What I have tried:
Mounting using Disk Utility
DiskManagement.disenter error 49218
Repairing drive using first aid
Results: Runs without error, exit status 0
Killing FSCK process via terminal
Repairing the volume through the command line
Trying differently sized volumes
Using volumes with size quotas instead of containers
In this instance it is the 1 TB partition that will not mount but I have also had it be the 300 GB partition (which is not included in the time machine backup).
The strangest thing to me is that even after erasing the whole SSD, and then re-adding the partitions. The issue still persists (regardless of whether I do or don't transfer any files onto the drive).
I have copies of most of the files stored on this SSD on a different drive so losing a couple things is not the end of the world but the frustrating thing is that this issue keeps returning.
Frankly I hope that I am just making a silly mistake and that someone will be happy to point it out. I cant say that I am very experienced or knowledgable in this field so any ideas or suggestions would be greatly appreciated.