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85 lines
3.6 KiB
Nix
85 lines
3.6 KiB
Nix
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{ config, pkgs, ... }:
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# hdparm - get/set SATA/IDE device parameters
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# -q Handle the next option quietly, suppressing normal output (but not error messages).
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# -I Print device information.
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# -C Check the current IDE power mode status:
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# unknown (drive does not support this command)
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# active/idle (normal operation)
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# standby (low power mode, drive has spun down)
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# sleeping (lowest power mode, drive is completely shut down)
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# -S Set the standby (spindown) timeout for the drive.
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# The timeout specifies how long to wait in idle (with no disk activity) before turning off the motor to save power.
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# The value of 0 disables spindown,
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# the values from 1 to 240 specify multiples of 5 seconds
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# and values from 241 to 251 specify multiples of 30 minutes.
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# -y Force an IDE drive to immediately enter the low power consumption standby mode, usually causing it to spin down.
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# Get power status:
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# sudo hdparm -C /dev/disk/by-id/ata-WDC_WD40EFRX-68N32N0_WD-WCC7K0CPF0N1
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# #=> drive state is: active/idle
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#
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# Spin down after 2 minutes (120s/5 = 24):
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# sudo hdparm -S 24 /dev/disk/by-id/ata-WDC_WD40EFRX-68N32N0_WD-WCC7K0CPF0N1 # 4tb1
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# sudo hdparm -S 24 /dev/disk/by-id/ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N1173157 # 3tb1
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# sudo hdparm -S 24 /dev/disk/by-id/ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0564095 # 3tb2
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# #=> setting standby to 24 (2 minutes)
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#
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# ... after >> 2 minutes ...
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#
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# Query disk without waking it up:
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# https://wiki.archlinux.org/title/hdparm#Querying_the_status_of_the_disk_without_waking_it_up
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# sudo smartctl -i -n standby /dev/disk/by-id/ata-WDC_WD40EFRX-68N32N0_WD-WCC7K0CPF0N1
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# #=> Device is in STANDBY mode, exit(2)
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#
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# Get power status:
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# sudo hdparm -C /dev/disk/by-id/ata-WDC_WD40EFRX-68N32N0_WD-WCC7K0CPF0N1
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# sudo hdparm -C /dev/disk/by-id/ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N1173157
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# sudo hdparm -C /dev/disk/by-id/ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0564095
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# #=> drive state is: standby
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# Power savings.
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# With 12tb1, 3tb1, 3tb2 spinning and 4tb1 spun-down: 26.1 W
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# With 12tb1 spinning and 3tb1, 3tb2, 4tb1 spun-down: 19.8 W
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# -> WD30EFRX measured idle spinning vs standby = +3.15 W
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# -> WD30EFRX advertised idle spinning vs unplugged = +3.0 W
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# See also: Systemd service to spin down after boot. https://wiki.archlinux.org/title/hdparm#Putting_a_drive_to_sleep_directly_after_boot
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# TODO: For external (USB-)disks, use `hd-idle`.
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# https://www.reddit.com/r/NixOS/comments/751i5t/comment/do3f3l7/
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# # Options:
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# # -a <disk>: Select disk for subsequent parameters.
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# # -i 180: Spin down after 2 minutes (180 seconds) of inactivity.
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# ExecStart = "${pkgs.hd-idle}/bin/hd-idle -a /dev/disk/by-id/XXX-XXX-XXX -i 180";
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{
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environment.systemPackages = with pkgs; [
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hdparm
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];
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systemd.services."hdparm-4tb1" = {
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description = "Spin down inactive HDD";
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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Type = "oneshot";
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ExecStart = "${pkgs.hdparm}/bin/hdparm -S 24 /dev/disk/by-id/ata-WDC_WD40EFRX-68N32N0_WD-WCC7K0CPF0N1";
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};
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};
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systemd.services."hdparm-3tb1" = {
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description = "Spin down inactive HDD";
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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Type = "oneshot";
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ExecStart = "${pkgs.hdparm}/bin/hdparm -S 24 /dev/disk/by-id/ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N1173157";
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};
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};
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systemd.services."hdparm-3tb2" = {
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description = "Spin down inactive HDD";
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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Type = "oneshot";
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ExecStart = "${pkgs.hdparm}/bin/hdparm -S 24 /dev/disk/by-id/ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0564095";
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};
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};
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}
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