{ pkgs, lib, ... }:
{
  environment.systemPackages = with pkgs; [
    hdparm
  ];

  services.udev.extraRules =
    let
      mkRule = as: lib.concatStringsSep ", " as;
      mkRules = rs: lib.concatStringsSep "\n" rs;
    in
    mkRules ([
      (mkRule [
        ''ACTION=="add|change"''
        ''SUBSYSTEM=="block"''
        ''KERNEL=="sd[a-z]"''
        ''ATTR{queue/rotational}=="1"''
        ''RUN+="${pkgs.hdparm}/bin/hdparm -B 90 -S 41 /dev/%k"''
      ])
    ]);
}