{
  disko.devices.disk = {
    boot1 = {
      content = {
        partitions = {
          efi = {
            content = {
              format = "vfat";
              mountOptions = [ "umask=0077" ];
              mountpoint = "/boot";
              type = "filesystem";
            };

            size = "512M";
            type = "EF00";
          };

          # the root partition is set up in boot2
          root.size = "100%";
        };

        type = "gpt";
      };

      device = "/dev/sda";
      type = "disk";
    };

    boot2 = {
      content = {
        partitions = {
          efi = {
            content = {
              format = "vfat";
              mountOptions = [ "umask=0077" ];
              #mountpoint = "/boot";
              type = "filesystem";
            };

            size = "512M";
            type = "EF00";
          };

          root = {
            content = {
              extraArgs = [
                "-f"
                "-d raid1"
                "/dev/sda2"
              ];

              subvolumes = {
                "/nix" = {
                  mountOptions = [
                    "compress=zstd"
                    "noatime"
                  ];

                  mountpoint = "/nix";
                };

                "/root" = {
                  mountpoint = "/";
                  mountOptions = [ "noatime" ];
                };
              };

              type = "btrfs";
            };

            size = "100%";
          };
        };

        type = "gpt";
      };

      device = "/dev/sdb";
      type = "disk";
    };

    mass-storage = {
      content = {
        partitions.data = {
          content = {
            extraArgs = [ "-f" ];
            subvolumes."/data" = {
              mountOptions = [ "noatime" ];
              mountpoint = "/mnt/data";
            };

            type = "btrfs";
          };

          size = "100%";
        };

        type = "gpt";
      };

      device = "/dev/sdc";
      type = "disk";
    };
  };
}