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Workaround: For any "oc" command covered in class, general guidance should be to use the associated "--help" option for further nuanced usage.

Description: In 2nd GE of Chapter 7, students drain one of the nodes.

If any pod with ephemeral storage is on the node, the standard "oc adm drain" command will fail.  A good example of this is a "build" pod.  If a build pod happens to be on the node being drained, the "drain will fail". 

The GE now uses the "--delete-local-data" option, to go ahead and forcefully removed pods that are utilizing ephemeral storage.  This enables the GE to work for students, but the option is not discussed in the SG. 

Also- I believe in OCP 3.9 the 'oc adm drain' command will mark a node as 'unschedulable'.  It's not necessary (but it still may be a good practice) to label the node as 'unschedulable' before draining it.