{ config, pkgs, ... }: {

  boot.initrd.kernelModules = [ "dm-snapshot" ];
  boot.initrd.luks.devices = {
    "system".device = "/dev/disk/by-uuid/ba646016-2618-4d9b-acf2-41986ab76f7e";
    "data".device = "/dev/disk/by-uuid/6cfe504d-992f-4b11-be3e-31d00c3e108d";
    "backup".device = "/dev/disk/by-uuid/772017c5-f176-4473-9db6-4aa3769cf056";
    "swap".device = "/dev/disk/by-uuid/c2f2bf21-51a8-4404-944c-ba83a9d7cf21";
  };

  fileSystems = {
    "/" = {
      device = "/dev/mapper/system";
      fsType = "btrfs";
    };
    "/mnt/data" = {
      device = "/dev/mapper/data";
      fsType = "btrfs";
    };
    "/mnt/backup" = {
      device = "/dev/mapper/backup";
      fsType = "btrfs";
    };
    "/boot-primary" = {
      device = "/dev/disk/by-uuid/7D11-F31D";
      fsType = "vfat";
    };
    "/boot-secondary" = {
      device = "/dev/disk/by-uuid/ED1A-59BF";
      fsType = "vfat";
    };
  };

  swapDevices = [{ device = "/dev/mapper/swap"; }];

  # TODO: RAID Monitoring
  # TODO: Set spin-down time of physical disks

  # Use the systemd-boot EFI boot loader.
  boot.loader.efi.canTouchEfiVariables = true;
  boot.loader.grub = {
    enable = true;
    efiSupport = true;
    mirroredBoots = [
      {
        devices = [ "nodev" ];
        path = "/boot-primary";
        efiBootloaderId = "NixOS primary";
      }
      {
        devices = [ "nodev" ];
        path = "/boot-secondary";
        efiBootloaderId = "NixOS secondary";
      }
    ];
  };
}