I usually use the dashboard IU to eject my 4tb external USB enclose once I do a backup. I do so manually once in a while. But when im done the eternal drive does not enter sleep mode as it does while it has the capability to do so when Its used on my laptop.
Anyways, is there a command using putty ? Otherwise I have to manually unplug the seagate external USB cable and replug it back in to the mycoud. Its a Pita. I hate to leave the seagate drive running 24/7 when its not necessary.