It seems like self test is failing
See the attached picture:
BD4717A7-A3F1-4035-8B05-9D9CCB7F7875.jpeg
I also made a short movie about what the drive does during the self test, without cover. It's available from here:
Furthermore, it's not listing the MD content anymore - further reduction of functionality. In your practice is this a problem of the disk, or the drive?
Can you recommend a next step?