{pkgs, ...}: {
  disko.devices.disk = {
    main = {
      device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi0";
      type = "disk";
      content = {
        type = "gpt";
        partitions = {
          boot = {
            size = "1M";
            type = "EF02"; # for grub MBR
          };
          root = {
            size = "100%";
            content = {
              type = "filesystem";
              format = "ext4";
              mountpoint = "/";
            };
          };
        };
      };
    };
    disk1 = {
      device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi1";
      type = "disk";
      content = {
        type = "gpt";
        partitions.luks = {
          size = "100%";
          content = {
            type = "luks";
            name = "disk1";
            passwordFile = "/tmp/pass.key";
            content = {
              type = "filesystem";
              format = "ext4";
              mountpoint = "/mnt/disk1";
            };
          };
        };
      };
    };
    disk2 = {
      device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi2";
      type = "disk";
      content = {
        type = "gpt";
        partitions.luks = {
          size = "100%";
          content = {
            type = "luks";
            name = "disk2";
            passwordFile = "/tmp/pass.key";
            content = {
              type = "filesystem";
              format = "ext4";
              mountpoint = "/mnt/disk2";
            };
          };
        };
      };
    };
    disk3 = {
      device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi3";
      type = "disk";
      content = {
        type = "gpt";
        partitions.luks = {
          size = "100%";
          content = {
            type = "luks";
            name = "disk3";
            passwordFile = "/tmp/pass.key";
            content = {
              type = "filesystem";
              format = "ext4";
              mountpoint = "/mnt/disk3";
            };
          };
        };
      };
    };
    parity = {
      device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi4";
      type = "disk";
      content = {
        type = "gpt";
        partitions.luks = {
          size = "100%";
          content = {
            type = "luks";
            name = "parity";
            passwordFile = "/tmp/pass.key";
            content = {
              type = "filesystem";
              format = "ext4";
              mountpoint = "/mnt/parity";
            };
          };
        };
      };
    };
  };
  environment.systemPackages = [
    pkgs.mergerfs
    pkgs.snapraid
  ];
  fileSystems."/mnt/pool" = {
    fsType = "fuse.mergerfs";
    device = "/mnt/disk*";
    options = [
      "cache.files=off"
      "dropcacheonclose=true"
      "category.create=eplus"
    ];
  };
  environment.etc."snapraid.conf".text = ''
    parity /mnt/parity/snapraid.parity
    content /var/snapraid.content
    content /mnt/disk1/general/snapraid.content
    content /mnt/disk2/general/snapraid.content
    content /mnt/disk3/general/snapraid.content
    data d1 /mnt/disk1/
    data d2 /mnt/disk2/
    data d3 /mnt/disk3/
    exclude /lost+found/
  '';
}