Raspberry 4 B;
OS: Arch Linux ARM;
Interface: USB 3.0
I have a Raspberry and external HDD, all the stuff's details are above.
I want to automatically suspend my hard disk (in order to saving power and make HDD lifespan longer). And when there is new IO request, the HDD will start again. But There isn't any GNOME or KDE software on the platform.
What software should I use or what configuration should I set to make My Raspberry 4 act as what I described above?