In the thread there was a reference to use the command "/sbin/poweroff" to see what would happen shutting the OS down that way. [note: I am NOT a Linux person, barely a MS-DOS guy, but I'm not afraid to try commands]
I booted the system, but I didn't Start the array from a browser like I normally do.
It was at the login prompt on the console "Tower login:". I logged into root and entered the command "/sbin/poweroff".
The OS hung on the way down at the same place as it does when I remote in and Start unRaid from a browser, then tell it to Shutdown:
...
/boot : successfully unmounted
/run : successfully unmounted
/sys : ignored
/proc : ignored
umount: /: not mounted.
It didn't power off. Just hung right there at "umount: /: not mounted." as before. Not sure what that tells me. I feel pretty sure the hardware is OK. Something has changed on one of my OS updates I guess.
I don't have any VMs, but I do have these 4 Plugins:
Community Applications, Dynamix System Information, Unassigned Devices and Unassigned Devices Plus
The other thing I couldn't help but notice is how there are big delays at some places on startup and shutdown when I watch the console. That's new. The OS used to boot and shutdown pretty fast.