Update NFS-Server.md

NFS-Server.md

@@ -16,6 +16,21 @@ use it for production workloads that depend on advisory file locking —
 shared NLM / NFSv4 lock state is not implemented yet (see
 [Limitations](#limitations)).
 
+```mermaid
+flowchart LR
+    Client["NFS client<br/>(Linux / macOS)"]
+    NFS["weed nfs"]
+    Filer["Filer"]
+    Volumes["Volume servers"]
+
+    Client -- "NFSv3 RPC" --> NFS
+    NFS -- "metadata" --> Filer
+    NFS -- "chunk read / write" --> Volumes
+    Filer -. "AssignVolume" .-> Volumes
+```
+
+Metadata RPCs go to the filer; chunk bytes flow directly between the NFS head and volume servers.
+
 ## Overview
 
 The NFS server provides:
@@ -150,21 +165,6 @@ servers are not reachable from the NFS host.
 
 ## Architecture
 
-```mermaid
-flowchart LR
-    Client["NFS client<br/>(Linux / macOS)"]
-    NFS["weed nfs"]
-    Filer["Filer"]
-    Volumes["Volume servers"]
-
-    Client -- "NFSv3 RPC" --> NFS
-    NFS -- "metadata" --> Filer
-    NFS -- "chunk read / write" --> Volumes
-    Filer -. "AssignVolume" .-> Volumes
-```
-
-Metadata RPCs go to the filer; chunk bytes flow directly between the NFS head and volume servers.
-
 ### Deterministic Filehandles
 
 Every filer entry in this PR now carries a filer-assigned inode