Description of problem:
Image registry configuration section (https://docs.openshift.com/container-platform/4.2/installing/installing_ibm_z/installing-ibm-z.html#installation-registry-storage-config_installing-ibm-z) doesnot provide any example of how to attach a PV to an OCP production cluster and the explanation is much abstract to follow during installation. An example or any reference to knowledge base of how to configure a PV and restart the image-registry operator will be helpful here.
Version-Release number of selected component (if applicable):
Persistent storage configuration is covered within its own section of the documentation:
Closing as not a bug.