It's an m.2, i don't get any relevant information out of any smartctl.
It all started when the GRUB refused to find the lvm:
1. Cloned the m.2 to another storage, Grub still needed to be repaired
2. done the grub repair procedure with the ''nudge'' operation to repair this newly cloned image
This post
3. Works
4. Tried to do the same thing on the original m.2 (step 2)
5. Grub found LVM and got repaired
6. System booted
but The aforementionned behavior occured
7. Tried to
reclone the working SSD copy (proven to be working) onto the original m.2
8. The aforementionned behavior occured again
It's a 970 evo plus
Samsung magician tells the m.2 is in good health and running the latest firmware. (I read posts of people stating that their problem where resolved with a flash, so no luck here for me.)
I'm currently running a DD clone off a ssd, feels slow like a snail.
I'm considering having a cheap boot zfs ssds and using the m.2 as a thin provision, but still not sure I can trust this device anymore.