Merge pull request #5269 from vladimirvivien/scaleio-doc-1.8

ScaleIO documentation update for 1.8

docs/concepts/storage/volumes.md

@@ -674,8 +674,8 @@ More details and examples can be found [here](https://github.com/kubernetes/kube
 ### ScaleIO
 ScaleIO is a software-based storage platform that can use existing hardware to create clusters of scalable
 shared block networked storage.  The ScaleIO volume plugin allows deployed pods to access existing ScaleIO
-volumes (or it can dynamically provision new volumes for persistent volume claims, see
-[ScaleIO Persistent Volumes](/docs/user-guide/persistent-volumes/#scaleio)).
+volumes or it can dynamically provision new volumes, see
+[ScaleIO Persistent Volumes](/docs/user-guide/persistent-volumes/#scaleio).
 
 **Important:** You must have an existing ScaleIO cluster already setup and running with the volumes created before you can use them.
 {: .caution}
@@ -699,6 +699,8 @@ spec:
     scaleIO:
       gateway: https://localhost:443/api
       system: scaleio
+      protectionDomain: sd0
+      storagePool: sp1
       volumeName: vol-0
       secretRef:
         name: sio-secret