I like how almost everybody back then earnestly believed that if power dropped, the drive would use its spinning-down motor as a generator to power finishing th

I like how almost everybody back then earnestly believed that if power dropped, the drive would use its spinning-down motor as a generator to power finishing the current sector write, and then home and lock the head. I don't know if any drive ever did that. But certainly the drives actual people actually had would not. Power hiccups, and whatever is being written becomes garbage (and maybe a few sectors after it, too), and the heads flop loose. Maybe a top-quality drive would turn off current to the write head if power sagged, so that the controller going crazy would not have lasting consequences. But certainly cheap drives never had anything that might have cost an extra penny.