The thread I’m talking about is: Pool Unavailable after upgrade from CORE 13 to SCALE 24
It seems like they were using just a normal truenas 13 and upgraded to 24.
I do have backups, my concern is once the main pools fail, I would be terrified trying to connect the backups to any system for concern of losing them.
I guess I could clone the backup disk to the spare and try to load that in truenas SCALE, if really everything goes that wrong.