I recently did a clean install of 20.04 on my server. In 18.04, I could spin down my mechanical drive with this line in hdparm.conf:
/dev/sda {
spindown_time = 25
}
Now, the config file doesn't appear to have any effect. I can still set the spindown manually:
sudo hdparm -S 25 /dev/sda
Any help is appreciated. Thanks!