I have an ARECA raid, I did do some things to make it a bit better and play nicer with Unraid, mostly from these forums.  This means the drives could be addressed/appear normally.  Now I'm worried my drives aren't spinning down which will generate heat and consume power.  Beyond the not spinning down and no temperature, I don't see any crashes/errors.   Prior to the upgrade the drives spun down.   In my /boot/config/go I do have an areca specific trick # Areca RAID config