diff --git a/disko.nix b/disko.nix
index ace68af..079927d 100644
--- a/disko.nix
+++ b/disko.nix
@@ -1,4 +1,4 @@
-# disko.nix  – Root-on-ZFS (rpool) + Datenpool (tank)
+# disko.nix – Root-on-ZFS (rpool) + Daten-Pool (tank)
 { disks, ... }:
 
 {
@@ -6,12 +6,12 @@
     disk.main = {
       device = builtins.elemAt disks 0;
       type   = "disk";
+
       content = {
         type = "gpt";
         partitions = {
           ESP = {
-            size = "512M";
-            type = "EF00";
+            size = "512M"; type = "EF00";
             content = {
               type       = "filesystem";
               format     = "fat32";
@@ -19,36 +19,46 @@
             };
           };
           rpool = {
-            size = "60G";
-            type = "BE00";
-            content = {
-              type = "zfs";
-              pool = "rpool";
-            };
+            size = "60G";  type = "BF00";
+            content = { type = "zfs"; pool = "rpool"; };
           };
           tank = {
-            type = "BE00";
-            content = {
-              type = "zfs";
-              pool = "tank";
-            };
+            type = "BF00";
+            content = { type = "zfs"; pool = "tank"; };
           };
         };
       };
     };
 
     zpool.rpool = {
+      type    = "zpool";
+      options = { ashift = "12"; autotrim = "on"; };
       datasets = {
-        root = { mountpoint = "/"; };
-        nix  = { mountpoint = "/nix"; };
-        home = { mountpoint = "/home"; };
+        root = {
+          type       = "zfs_fs";
+          mountpoint = "/";
+          options.compression = "zstd";
+        };
+        nix = {
+          type       = "zfs_fs";
+          mountpoint = "/nix";
+          options.compression = "zstd";
+        };
+        home = {
+          type       = "zfs_fs";
+          mountpoint = "/home";
+          options.compression = "zstd";
+        };
       };
-      rootFs = "root";
     };
 
     zpool.tank = {
-      datasets = {
-        media = { mountpoint = "/tank"; };
+      type    = "zpool";
+      options = { ashift = "12"; autotrim = "on"; };
+      datasets.media = {
+        type       = "zfs_fs";
+        mountpoint = "/tank";
+        options.compression = "zstd";
       };
     };
   };