final-finally?

configuration.nix

@@ -11,16 +11,27 @@
   networking.hostName = "nix-nas";
   networking.hostId = "39373132";  # via: head -c4 /etc/machine-id | od -An -tx4
 
-  fileSystems = {
+  fileSystems."/" =
-    "/nix" = {
+    { device = "rpool/root";
-      device = "rpool/nix";
       fsType = "zfs";
     };
-    "/home" = {
+
-      device = "rpool/home";
+  fileSystems."/nix" =
+    { device = "rpool/nix";
       fsType = "zfs";
     };
-  };
+
+  fileSystems."/home" =
+    { device = "tank/home";
+      fsType = "zfs";
+    };
+
+  fileSystems."/tank" =
+    { device = "tank/media";
+      fsType = "zfs";
+    };
+
+  swapDevices = [ ];
 
   users.users.nicole = {
     isNormalUser = true;

disko.nix

@@ -11,7 +11,7 @@
         type = "gpt";
         partitions = {
           ESP = {
-            size = "512M"; type = "EF00";
+            size = "1G"; type = "EF00";
             content = {
               type       = "filesystem";
               format     = "vfat";
@@ -20,11 +20,11 @@
             };
           };
           rpool = {
-            size = "60G";  type = "BF00";
+            size = "60G";
             content = { type = "zfs"; pool = "rpool"; };
           };
           tank = {
-            type = "BF00";
+            size = "100%";
             content = { type = "zfs"; pool = "tank"; };
           };
         };
@@ -34,20 +34,25 @@
     zpool.rpool = {
       type    = "zpool";
       options = { ashift = "12"; autotrim = "on"; };
+      rootFsOptions = {
+        compression = "zstd";
+      };
+      postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^rpool@blank$' || zfs snapshot rpool@blank";
+
       datasets = {
         root = {
           type       = "zfs_fs";
           mountpoint = "/";
-          options.compression = "zstd";
+          options = {
+            mountpoint = "legacy";
+            compression = "zstd";
+            "com.sun:auto-snapshot" = "false";
+          };
         };
         nix = {
           type       = "zfs_fs";
-          mountpoint = "legacy";
+          mountpoint = "/nix";
-          options.compression = "zstd";
+          options.mountpoint = "legacy";
-        };
-        home = {
-          type       = "zfs_fs";
-          mountpoint = "legacy";
           options.compression = "zstd";
         };
       };
@@ -56,10 +61,20 @@
     zpool.tank = {
       type    = "zpool";
       options = { ashift = "12"; autotrim = "on"; };
-      datasets.media = {
+      postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^tank@blank$' || zfs snapshot tank@blank";
-        type       = "zfs_fs";
+      datasets = {
-        mountpoint = "/tank";
+        media = {
-        options.compression = "zstd";
+          type       = "zfs_fs";
+          mountpoint = "/tank";
+          options.mountpoint = "legacy";
+          options.compression = "zstd";
+        };
+        home = {
+          type       = "zfs_fs";
+          mountpoint = "/home";
+          options.mountpoint = "legacy";
+          options.compression = "zstd";
+        };
       };
     };
   };

flake.nix

@@ -14,7 +14,7 @@
   let
     system = "x86_64-linux";
   in {
-    nixosConfigurations.host = nixpkgs.lib.nixosSystem {
+    nixosConfigurations.nix-nas = nixpkgs.lib.nixosSystem {
       inherit system;                     # ← Pflichtfeld
       specialArgs.disks = [ "/dev/nvme0n1" ];
       modules = [