{
  # Disks are sdb and sdc 
  # https://github.com/nix-community/disko/blob/master/example/boot-raid1.nix
  imports = [ ../../common/services/snapper.nix ];

  # extra configs not present in the standard config above
  services.snapper.configs.Storage = {
    TIMELINE_CREATE = true;
    TIMELINE_CLEANUP = true;
    SUBVOLUME = "/Storage";
  };
  
  services.btrfs.autoScrub.enable = true;
  services.btrfs.autoScrub.interval = "weekly";

  disko.devices.disk = {
    sdb = {
      type = "disk"; 
      device = "/dev/sdb";
      content = {
        type = "gpt";
        partitions = {
          BOOT = {
            size = "1M"; 
            type = "EF02"; # GRUB MBR
          };
          ESP = {
            size = "500M";
            type = "EF00";
            content = {
              type = "mdraid";
              name = "boot";
            };
          };
          mdadm = {
            size = "100%";
            content = "mdraid";
            name = "raid1";
          };
        };
      };
    };

    sdc = {
      type = "disk"; 
      device = "/dev/sdc";
      content = {
        type = "gpt";
        partitions = {
          BOOT = {
            size = "1M"; 
            type = "EF02"; # GRUB MBR
          };
          ESP = {
            size = "500M";
            type = "EF00";
            content = {
              type = "mdraid";
              name = "boot";
            };
          };
          mdadm = {
            size = "100%";
            content = "mdraid";
            name = "raid1";
          };
        };
      };
    };
  };
  mdadm = {
    boot = {
      type = "mdadm";
      level = 1;
      metadata = "1.0";
      content = {
        type = "Filesystem";
        format = "vfat";
        mountpoint = "/boot";
        mountOptions = [ "umask=0077" ];
      };
    };
    raid1 = {
      type = "mdadm";
      level = 1;
      content = {
        type = "gpt";
        partitions = {
          LUKS-ROOT = { 
            start = "550MiB";
            end = "100%";
            content = {
              type = "luks";
              name = "ROOT";
              extraOpenArgs = [ "--allow-discards" ];
              content = {
                type = "btrfs";
                extraArgs = [ "-f" ];
                subvolumes = {
                  "/root" = {
                    mountpoint = "/";
                    mountOptions = [ "compress=zstd" "noatime" ];
                  }; # root
                  "/home" = {
                    mountpoint = "/home";
                    mountOptions = [ "compress=zstd" "noatime" ];
                  }; # home
                  "/nix" = {
                    mountpoint = "/nix";
                    mountOptions = [ "compress=zstd" "noatime" ];
                  }; # nix
                  "/Storage" = {
                    mountpoint = "/Storage";
                    mountOptions = [ "compress=zstd" "noatime" ];
                  }; # Storage
                  # SNAPSHOT SUBVOLS
                  "/root/.snapshots" = {
                    mountpoint = "/.snapshots";
                    mountOptions = [ "compress=zstd" "noatime" ];
                  }; # root
                  "/home/.snapshots" = {
                    mountpoint = "/home/.snapshots";
                    mountOptions = [ "compress=zstd" "noatime" ];
                  }; # home
                  "/nix/.snapshots" = {
                    mountpoint = "/nix/.snapshots";
                    mountOptions = [ "compress=zstd" "noatime" ];
                  }; # nix
                  "/Storage/.snapshots" = {
                    mountpoint = "/Storage/.snapshots";
                    mountOptions = [ "compress=zstd" "noatime" ];
                  }; # Storage
                }; # subvolumes
              }; # content.content
            }; # content
          }; # partition 2 (/ BTRFS)
        };
      };
    };
  };
}