{ disks ? [ "/dev/vdb" "/dev/vdc" ], ... }: {
  disk = {
    vdb = {
      type = "disk";
      device = builtins.elemAt disks 0;
      content = {
        type = "table";
        format = "gpt";
        partitions = [
          {
            name = "boot";
            type = "partition";
            start = "0";
            end = "1M";
            part-type = "primary";
            flags = ["bios_grub"];
          }
          {
            type = "partition";
            name = "mdadm";
            start = "1MiB";
            end = "100%";
            content = {
              type = "mdraid";
              name = "raid1";
            };
          }
        ];
      };
    };
    vdc = {
      type = "disk";
      device = builtins.elemAt disks 1;
      content = {
        type = "table";
        format = "gpt";
        partitions = [
          {
            name = "boot";
            type = "partition";
            start = "0";
            end = "1M";
            part-type = "primary";
            flags = ["bios_grub"];
          }
          {
            type = "partition";
            name = "mdadm";
            start = "1MiB";
            end = "100%";
            content = {
              type = "mdraid";
              name = "raid1";
            };
          }
        ];
      };
    };
  };
  mdadm = {
    raid1 = {
      type = "mdadm";
      level = 1;
      content = {
        type = "table";
        format = "gpt";
        partitions = [
          {
            type = "partition";
            name = "primary";
            start = "1MiB";
            end = "100%";
            content = {
              type = "filesystem";
              format = "ext4";
              mountpoint = "/";
            };
          }
        ];
      };
    };
  };
}