I have a mini box (laptop based hardware) with windows 10 x64 installed on msata based SSD. Power plan set to Never Sleep. I have a SATA 2.5' HDD for backup purpose.
The HDD just keeps spinning even set offline in Partition Management.
I suspect it's hardware related or caused by SSD-HDD mix. Is there a way to prevent the HDD from spinning when idle?
Edit: HDD connected through internal SATA3 port. I've waited day long and HDD spin down won't happen. Haven't tried on other systems yet.