pm-utils: убъем ваш винт за пол года

# Default values on AC
DRIVE_SPINDOWN_VALUE_AC="${DRIVE_SPINDOWN_VALUE_AC:-0}"
DRIVE_WRITE_CACHE_AC="${DRIVE_WRITE_CACHE_AC:-1}" 
DRIVE_POWER_MGMT_AC="${DRIVE_POWER_MGMT_AC:-254}"
DRIVE_ACOUSTIC_MGMT_AC="${DRIVE_ACOUSTIC_MGMT_AC:-0}"

# Default values on battery
DRIVE_SPINDOWN_VALUE_BAT="${DRIVE_SPINDOWN_VALUE_BAT:-6}" # Парковка головок винта каждые 30 сек неактивности
DRIVE_WRITE_CACHE_BAT="${DRIVE_WRITE_CACHE_BAT:-0}" 
DRIVE_POWER_MGMT_BAT="${DRIVE_POWER_MGMT_BAT:-1}" # Агрессивный метод энергосбережения, винт паркуется сразу после прекращения активности.
DRIVE_ACOUSTIC_MGMT_BAT="${DRIVE_ACOUSTIC_MGMT_BAT:-254}"

This hook has 8 tuneable parameters:
DRIVE_SPINDOWN_VALUE_AC = time until a drive will spin down on AC
Defaults to 0, which disables drive spindown.
DRIVE_SPINDOWN_VALUE_BAT = time until a drive will spin down on battery
Defaults to 6, which will spin the drive down after 30 seconds of inactivity.

See the -S option on the hdparm manpage for more information.

DRIVE_WRITE_CACHE_AC = Whether the drive caches writes on AC
Defaults to 1, which means that the drive will cache writes internally.
DRIVE_WRITE_CACHE_BAT = Whether the drive caches writes on battery.
Defaults to 0 which means that the drive will not cache writes internally.

See the -W option on the hdparm man page for more information.

DRIVE_POWER_MGMT_AC = Drive Advanced Power Management value on AC
Defaults to 254 for max performance.
DRIVE_POWER_MGMT_BAT = Drive Advanced Power Management value on battery
Defaults to 1 for max power savings.

See the -B option on the hdparm man page

Drive acoustic management:
DRIVE_ACOUSTIC_MGMT_AC = Drive Acoustic Management value on AC
Defaults to 254 for max head speed.
DRIVE_ACOUSTIC_MGMT_BAT = Drive Acoustic Management value on battery
Defaults to 128 for max quietness.

See the -M option on the hdparm man page.