gnome-disk-utility or hdparm to spin down hdd permanently → issues

I used to use this hdparm -Y /dev/sda under KDE to spin down hdd disk but this stopped to work as disk started to spin up by itself, I couldn't find a way to correct this by using other hdparm parameters and afrer a wide research found that still this function offers gnome-disk-utility and work like a charm but...I would like to make disk spun down at startup and found that this gnome-disks app offers really only few options via terminal, it's rather GUI app...anyway if somebody know how this may be done and hdd disk spun down at each system startup I would appreciate this help