{lib, ...}: {
  disko.devices = {
    disk = {
      sda = {
        device = "/dev/sda";
        type = "disk";
        content = {
          type = "gpt";
          partitions = {
            boot = {
              size = "1M";
              type = "EF02";
            };
            sda2 = {
              size = "1G";
              content = {
                type = "filesystem";
                format = "ext4";
                mountpoint = "/boot";
              };
            };

            sda3 = {
              size = "100%";
              content = {
                type = "bcachefs";
                filesystem = "mounted_subvolumes_in_multi";
                label = "group_a.sda2";
                extraFormatArgs = [];
              };
            };
          };
        };
      };
    };
    bcachefs_filesystems = {
      mounted_subvolumes_in_multi = {
        type = "bcachefs_filesystem";
        extraFormatArgs = [
          "--compression=lz4"
          "--background_compression=lz4"
        ];
        subvolumes = {
          "subvolumes/root" = {
            mountpoint = "/";
            mountOptions = [
              "verbose"
            ];
          };
          "subvolumes/nix" = {
            mountpoint = "/nix";
          };
        };
      };
    };
  };
}