Ah, good point about the Power Supplies! That's also hardware monitoring of course.
So, let's check which Sensors our hardware scan has discovered. If you expand the Host in the Compute Topology view, there is a hardware sensor container, and various sensor classes underneath.
You can select any sensor class (or the container itself) and there will be an in-context Task available "List all xxxx sensors" (e.g. List all power sensors)
If you list out all the Disk sensors, do you see the RAID volumes/disks there?