[docs] add vmWithDisko documentation

doc/src/anleitung/create.md

@@ -42,6 +42,25 @@ sudo nix --extra-experimental-features "flakes nix-command" run 'github:nix-comm
 # failed with no space left on device.
 # problem is lots of data is written to the local /nix/store which is mounted on tmpfs in ram
 # it seems that a workaround could be modifying the bootable stick to contain a swap partition to extend tmpfs storage
-
-
+```
+
+# Testing Disko
+Testing disko partitioning is working quite well. Just run the following and check the datasets in the vm:
+```bash
+nix run -L .\#nixosConfigurations.fanny.config.system.build.vmWithDisko
+```
+
+Only problem is that encryption is not working, so it needs to be commented out. For testing host fanny the following parts in ```./machines/modules/disko/fanny.nix``` need to be commented out(for both pools!):
+```nix
+datasets = {
+  encrypted = {
+    options = {
+      encryption = "aes-256-gcm"; #THIS ONE
+      keyformat = "passphrase"; #THIS ONE
+      keylocation = "file:///tmp/root.key"; #THIS ONE
+    };
+    # use this to read the key during boot
+     postCreateHook = '' #THIS ONE 
+       zfs set keylocation="prompt" "zroot/$name"; #THIS ONE 
+     ''; #THIS ONE 
 ```