Is HDD Advanced Power Management in SnakeOil OS possible?

[agent_kith]

Thanks for a super quick answer! 
Yes, it is about good ole spinning drives. 
I'm not sure if I'm going to by a WD drive, and, if I understood correctly the info on the net, idle3 utility works exclusively on WD.
I'm leaning more to Seagate, due to a very tempting price that I can get locally.
HDPARM should be more universal? More like HDAPM that I'm using on my MacMini with a Hitachi drive.
Can it be used with SnakeOil? What would be the procedure?

It's more the firmware on the HDD than Linux software. Seagate will be a good choice, as hdparm specifically says:
 

Code:

       -Z     Disable the automatic power-saving function of certain Seagate drives (ST3xxx models?), to prevent
              them from idling/spinning-down at inconvenient times.

So, try and run this in the SSH session (Replacing X with the correct alphabet:

Code:

sudo hdparm -Z /dev/sdX

If you get no errors, and confirm the HDD is never spun down. You can then add the command in /etc/rc.local