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spin-down-hdd

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This commit is contained in:
Daniel Langbein 2023-11-23 13:04:07 +01:00
parent b07e59d12d
commit 15dc4c195a
Signed by: langfingaz
GPG Key ID: 6C47C753F0823002
2 changed files with 35 additions and 11 deletions
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13
examples/case-esac.sh Normal file
View File

@ -0,0 +1,13 @@
#!/usr/bin/env bash
set -eu -o pipefail
x='some-test'
case "${x}" in
*'_'*|*'-'*)
echo "The string contains _ or -"
;;
*)
echo 'No pattern matched'
;;
esac

33
modules/spin-down-hdd.nix
View File

@ -54,11 +54,6 @@
# # -i 120: Spin down after 2 minutes (120 seconds) of inactivity.
# ExecStart = "${pkgs.hd-idle}/bin/hd-idle -a /dev/disk/by-id/XXX-XXX-XXX -i 120";
# Note about the `script` settings below.
# If the disk is spun-down (in standby mode):
# - The standby timeout has been set before already, otherwise it would be spinning.
# - Don't set the standby timeout again, as this will spin up the disk.
{ lib, config, options, pkgs, modulesPath, ... }:
with lib;
let
@ -77,11 +72,6 @@ in
};
config = mkIf (length cfg > 0) {
# TODO: Is this required or is it enough to use `${pkgs.hdparm}` in the systemd service script?
environment.systemPackages = with pkgs; [
hdparm
];
# For each element (e.g. "ata-WDC_WD40EFRX-68N32N0_WD-WCC7K0CPF0N1") in `cfg` create this config:
# systemd.services."hdparm-ata-WDC_WD40EFRX-68N32N0_WD-WCC7K0CPF0N1" = {
# description = ...;
@ -95,7 +85,28 @@ in
wantedBy = [ "multi-user.target" ];
serviceConfig.Type = "oneshot";
script = ''
${pkgs.hdparm}/bin/hdparm -C /dev/disk/by-id/${id} | ${pkgs.busybox}/bin/grep 'standby' || ${pkgs.hdparm}/bin/hdparm -S 24 /dev/disk/by-id/${id}
set -eu -o pipefail
# Get IDE power mode status and remove any whitespace characters for easier pattern matching.
result="$(${pkgs.hdparm}/bin/hdparm -C /dev/disk/by-id/${id} | ${pkgs.coreutils}/bin/tr -d '[:space:]')"
case "''${result}" in
*'/dev/disk/by-id/${id}:drivestateis:standby'*|*'/dev/disk/by-id/${id}:drivestateis:sleeping'*)
printf '%s\n' 'Disk is in standby or sleeping.'
# Don't set idle timeout as this would spin up the disk.
# It has already been set before, otherwise the disk would be spinning.
;;
*'/dev/disk/by-id/${id}:drivestateis:active/idle'*)
printf '%s\n' 'Disk is active. Set idle timeout to 10 minutes.'
${pkgs.hdparm}/bin/hdparm -S 24 /dev/disk/by-id/${id}
;;
*'/dev/disk/by-id/${id}:drivestateis:unknown'*)
printf '%s\n' 'Disk is not supported by hdparm.'
exit 1
;;
*)
printf '%s%s\n' 'Unknown hdparm output: ' "''${result}"
exit 1
;;
esac
'';
};
}) cfg);