1 files changed, 82 insertions, 0 deletions
diff --git a/system/disks/default.nix b/system/disks/default.nix
new file mode 100644
index 0000000..f4e6935
--- /dev/null
+++ b/system/disks/default.nix
@@ -0,0 +1,82 @@
+{
+  config,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.system.disks;
+  defaultMountOptions = ["compress-force=zstd:15"];
+in {
+  options.system.disks = {
+    disk = mkOption {
+      type = lib.types.path;
+      example = literalExpression "/dev/disk/by-id/ata-WDC_WD10SDRW-11A0XS0_WD-WXP2A901KJN5";
+      description = lib.mdDoc "Path to the disk";
+    };
+  };
+
+  config = {
+    disko.devices = {
+      disk.main = {
+        device = cfg.disk;
+        content = {
+          type = "table";
+          format = "gpt";
+          partitions = [
+            {
+              name = "boot";
+              start = "0";
+              end = "1M";
+              part-type = "primary";
+              flags = ["bios_grub"];
+            }
+            {
+              name = "root";
+              # leave space for the grub aka BIOS boot
+              start = "1M";
+              end = "100%";
+              part-type = "primary";
+              bootable = true;
+              content = {
+                type = "btrfs";
+                extraArgs = ["-f" "--label nixos"]; # f: Override existing partitions
+                subvolumes = {
+                  "nix" = {
+                    mountpoint = "/nix";
+                    mountOptions = defaultMountOptions;
+                  };
+                  "persistent-storage" = {
+                    mountpoint = "/srv";
+                    mountOptions = defaultMountOptions;
+                  };
+                  "persistent-storage@snapshots" = {
+                    mountpoint = "/srv/.snapshots";
+                    mountOptions = defaultMountOptions;
+                  };
+                  "boot" = {
+                    mountpoint = "/boot";
+                    mountOptions = defaultMountOptions;
+                  };
+                };
+              };
+            }
+          ];
+        };
+      };
+      nodev = {
+        "/" = {
+          fsType = "tmpfs";
+          mountOptions = ["defaults" "size=2G" "mode=755"];
+        };
+      };
+    };
+    fileSystems = {
+      "/srv" = {
+        neededForBoot = true;
+      };
+      "/boot" = {
+        neededForBoot = true;
+      };
+    };
+  };
+}