{
  pkgs,
  config,
  lib,
  ...
}: let
  cfg = config.holocron.zfs;
  sec = config.sops.secrets;
in {
  options.holocron.zfs = {
    enable = lib.mkEnableOption "enables zfs";
  };

  config = lib.mkIf cfg.enable {
    # set network host id

    # enable zfs support
    boot.kernelModules = ["zfs"];
    boot.supportedFilesystems = ["zfs"];
    boot.zfs.forceImportRoot = false;
    #    boot.initrd.services.zfs.enable = true;
    #    boot.zfs.requestEncryptionCredentials = true;

    # arc cache size
    boot.kernelParams = ["zfs.zfs_arc_max=12884901888"];

    # pools to import
    boot.zfs.extraPools = ["holocron"];

    # enable smart monitoring

    services.smartd = {
      enable = true;
      autodetect = true;
      defaults.monitored = "-a -o on -s (S/../.././05|L/../01/./05)";
      notifications = {
        test = false;
        mail = {
          enable = true;
          recipient = "blake";
          sender = "alerts@blakedheld.xyz";
        };
      };
    };

    # enable zfs
    services.zfs = {
      autoScrub.enable = true;
      autoScrub.interval = "weekly";
      autoSnapshot = {
        enable = true;
        frequent = 4; # 15 min snapshots
        hourly = 24; # hourly snapshots
        daily = 7; # daily snapshots
        weekly = 4; # weekly snapshots
        monthly = 12; # monthly snapshots
      };
      # email notifs
      zed = {
        enableMail = true;
        settings = {
          ZED_EMAIL_ADDR = ["root" "blake"];
          # send notification if scrub succeeds
          ZED_NOTIFY_VERBOSE = true;
        };
      };
    };

    # install userspace tools for smart
    environment.systemPackages = with pkgs; [smartmontools];
  };
}