Hdparm does not apply spindown settings

I have conf for hdparm: /etc/hdparm.conf apm = 127 force_spindown_time = 120 /dev/sda { apm = 127 acoustic_management = 128 spindown_time = 120 } /dev/sdb { apm = 127 acoustic_management = 128 spindown_time = 120 } But **hdparm -S** show missing value root@DietPi:~# hdparm -S /dev/[sh]d[a-z] -S: bad/missing standby-interval value (0..255) If I run command to enable it - everything seems ok, but no. Settings does not apply: root@DietPi:~# hdparm -S 120 /dev/sda /dev/sda: setting standby to 120 (10 minutes) root@DietPi:~# hdparm -S /dev/sda -S: bad/missing standby-interval value (0..255) root@DietPi:~# hdparm -B /dev/sda /dev/sda: APM_level = 127 root@DietPi:~#