Good time of the day. I wonder if there is an utility for disturbing (writting a byte every N seconds in order to stop it move its head to a landing zone) a mounted HDD until it is unmounted? If not, then, how I can find out what is PID (being ran from a bash script) of the back grounded process (I think to accomplish it w/ the help of watch and echo a byte to the drive) in order I may kill it on un-mounting the drive? Thanks for Your time.