Disk 20 was suspect and is mid-preclear. I'm pretty sure it's going to get disposed of.
Default web GUI inside a Vivaldi tab. Behavior is the same (spins, goes back to green ball) from Edge and Chrome with all other web browsers closed when trying.
Most recent nchan error looked to me to be about 6 hours before I pulled diagnostics (and a few hours before I started looking into SAS spindown), and I'd rebooted my desktop between then and trying to get Spin Down SAS Drives installed/working.
edit: typo