So I bought an Odroud HC2 recently, running a 10TB Barracuda Pro hard drive in it. Installed Armbian (not a big fan), would rather just install OMV "bare metal" but (since there seems to be no way to do that now) whatever.
Problem is I can't seem to get spindown to work reliably. It works one time if I set it under the Disks section, set to spin down after 5 minutes if there is no activity, but then it doesn't work a second time. If I change one of the parameters, it works again the 1st time, but not afterwards. Very annoying.
I've tied playing with Suspend from the Power Menu & that works no problem, but then can't figure out how to wake the system, since apparently the HC2 doesn't support WOL (great choice ODROID).