I have external HDD connected to raspberry PI. I wont to set the spindown time to 5 minutes. When I use
sudo hdparm -S 60 /dev/sda it works fine. Of course, I set up APM before to 127 by
sudo hdparm -B 127 /dev/sda. I wont this configuration to apply after reboot of raspberry PI so I add to /etc/hdaprm.conf this lines:
apm = 127
spindown_time = 60
After reboot, my disk have APM set to 127 but spindown time is not 5 minutes. When I tryed to reach my HDD and, it will spin down in 2 or 3 sec. I dont konw how to solve this issue. Can anybody help me and explain me why this happend?