69-hdparm.rules

ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -A 1 /dev/%k"
# A value of 127 should be used, except for servers where 254 should be used instead.
ACTION=="add|change", KERNEL=="sd[a-z]", ATTRS{queue/rotational}=="1", RUN+="/usr/bin/hdparm -q -B 127 /dev/%k"
ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -c 3 /dev/%k"
ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -d 1 /dev/%k"
ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -D 1 /dev/%k"
ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -m 16 /dev/%k"
ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -M 254 /dev/%k"
ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -R 0 /dev/%k"
# This should only be set for servers.
# ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -S 0 /dev/%k"
ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -u 1 /dev/%k"
ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -W 1 /dev/%k"

# Disable automatic power-saving of Seagate ST3* drives.
ACTION=="add|change", KERNEL=="sd[a-z]", ATTRS{device/model}=="*ST3*", RUN+="/usr/bin/hdparm -q -Z /dev/%k"

# Increase the parking delay of WD Green drives.
ACTION=="add|change", KERNEL=="sd[a-z]", ATTRS{device/model}=="WDC WD*ADS|WDC WD*EZRX", RUN+="/usr/bin/hdparm -q -J 30 /dev/%k"

# Reduce tail latency for high queue depths.
ACTION=="add|change", KERNEL=="sd[a-z]", ATTRS{device/ncq_prio_supported}=="1", ATTRS{device/ncq_prio_enabled}="1"
ACTION=="add|change", KERNEL=="sd[a-z]", RUN+="/usr/bin/hdparm -q -Q 32 /dev/%k"