# Power management for NAS
# - CPU powersave governor (scales up on demand for transcoding)
# - Disk spindown after 15 minutes idle
{ config, lib, pkgs, ... }:

{
  # CPU Power Management - powersave scales up on demand for transcoding
  powerManagement.cpuFreqGovernor = "powersave";

  # Disk spindown - hdparm for Seagate 18TB drives
  environment.systemPackages = [ pkgs.hdparm ];

  services.udev.extraRules = ''
    # Seagate 18TB NAS drives - APM 127 allows spindown, -S 180 = 15 min
    ACTION=="add", KERNEL=="sd[a-z]", SUBSYSTEM=="block", \
      ATTRS{model}=="ST18000NM000J*", \
      RUN+="${pkgs.hdparm}/bin/hdparm -B 127 -S 180 /dev/%k"

    # Toshiba 20TB NAS drives - same settings
    ACTION=="add", KERNEL=="sd[a-z]", SUBSYSTEM=="block", \
      ATTRS{model}=="TOSHIBA MG10ACA20TE*", \
      RUN+="${pkgs.hdparm}/bin/hdparm -B 127 -S 180 /dev/%k"
  '';
}