I did quite some research when I worked with the WD Red Plus drives and also tried the -S switch, without success.

In openSeaChest I just set the number of milliseconds for each power mode and it just works. I’m happy with that.

This.

Having a subscription doesn’t mean you have the right to pirate when the service goes down. You only own what you buy.

Add --no-remote to start different profiles simultaneously.

Example:

firefox -P 'Joel User' --no-remote