Comment 5 for bug 738757

Ah, thanks for the details. The -S part is the second point in comment 2. It seems to me that /lib/udev/rules.d/85-hdparm.rules already applies *all* the settings (i. e. including -S) from hdparm.conf, so that should work on at least boot and probably also hibernate.

So I'll modify this to be more closely to your original proposal.