nix/host/x86_64-linux/desktop/Filesystem.nix

{ ... }:
{
  fileSystems = {
    "/storage/hot" = {
      device = "/dev/storage/hot";
      fsType = "ext4";
      options = [
        "noatime"
        "nofail"
      ];
    };

    "/storage/cold_1" = {
      device = "/dev/storage/cold_1";
      fsType = "ext4";
      options = [
        "noatime"
        "noauto"
        "nofail"
      ];
    };

    "/storage/cold_2" = {
      device = "/dev/storage/cold_2";
      fsType = "ext4";
      options = [
        "noatime"
        "noauto"
        "nofail"
      ];
    };
  };
}