Document URL: 

https://docs.openshift.com/container-platform/4.1/architecture/understanding-development.html#understanding-kubernetes-pods

read 5th paragraph
If your container requires on-disk storage instead of database storage, which might be provided through a service, you can add volumes to your manifests to make that storage available to your Pods. You can configure the manifests to create physical volumes (PVs) or dynamically create volumes that are added to your Pod definitions.

Section Number and Name: 

Describe the issue: 
PV is persistent volume

Suggestions for improvement: 

Fix the issue

Additional information: