diff --git a/FUSE-Mount.md b/FUSE-Mount.md
index 4d3d0f2..d5a075a 100644
--- a/FUSE-Mount.md
+++ b/FUSE-Mount.md
@@ -44,7 +44,8 @@ There are no network round trip to lookup the volume id location.
 
 For reads:
 1. Client Reads File Metadata => Weed Filer => Weed Filer database (LevelDB, Cassandra, Redis, Mysql, Postgres, etc)
-2. Client Reads File Chunks => Weed Volume Servers
+2. Client optionally lookup volume Id => Weed Filer => Weed Master
+3. Client Reads File Chunks => Weed Volume Servers
 
 ![](MountRead.png)
 
diff --git a/MountRead.png b/MountRead.png
index e5d8fec..ad28871 100644
Binary files a/MountRead.png and b/MountRead.png differ
diff --git a/MountWrite.png b/MountWrite.png
index 2053368..47d2464 100644
Binary files a/MountWrite.png and b/MountWrite.png differ
diff --git a/zenuml.txt b/zenuml.txt
new file mode 100644
index 0000000..494c3de
--- /dev/null
+++ b/zenuml.txt
@@ -0,0 +1,32 @@
+fileContent = WeedMount.ReadFile{
+  metadata = WeedFiler.ReadMetaData{
+    metadata = FilerStore.ReadMetaData{}
+  }
+  location = WeedFiler.LookupVolumeId{
+    location = Master.LookupVolumeId{}
+  }
+  chunks = VolumeServer.ReadChunks(){}
+}
+
+success = WeedMount.WriteFile{
+  fileIds = WeedFiler.Assign{
+    fileIds = Master.Assign{}
+  }
+  success = VolumeServer.WriteChunks(fileId){}
+  success = WeedFiler.WriteMetaData{
+    success = FilerStore.SaveMetaData{}
+    VolumeServer.PurgeOldChunks{}
+  }
+}
+
+metadata = Filer.Read(path){
+  metadata = FilerStore.Lookup(path)
+}
+volumeServerLocation = WeedMaster.Lookup(volumdId)
+content = VolumeServer.Read(fileId) {
+}
+
+fileContent = WeedMount.ReadFile{
+  metadata = WeedFiler.ReadMetaData{}
+  chunks = VolumeServer.ReadChunks(){}
+}