Mac mini M4 cooling an external drive with a secondary sensor trigger

[lylehm]

Thanks to Apple's storage tax, the new mini M4 will herald a surge of external drive sales.

With some of these fanless drives designed to sit beneath the M4 mini, the downward mini fan contributes to its cooling.

My request is first to make external drive sensors a toggle-able option vs. fully disabled (see bug report #735).
(I see this request is also mentioned here #803 "Display of temperatures of Thunderbolt drives")

Part 2 is to allow for secondary fan overrides so a single fan can increase speed based on multiple sensors.

An example would be a typical range set for the mini's Exhaust fan based on the CPU as the primary control. A secondary control for the same Exhaust fan would then be defined for the external SSD. So, if the SSD warms but the CPU doesn't, the secondary control can override the primary and increase the fan speed. The control with the fastest fan speed at a particular temperature takes priority.

Here's a rudimentary mockup:

Here's an example of one of the external "under the mini" drives.

I can see easily this as a pro version feature.

Thanks!