Added OSDOCS-141 to 4.0 files

Author: mburke5678

modules/efk-logging-deploy-variables.adoc

@@ -377,7 +377,10 @@ openshift_logging_es_pvc_dynamic value.
 |`openshift_logging_es_pvc_size`
 |Size of the persistent volume claim to
 create per Elasticsearch instance. For example, 100G. If omitted, no PVCs are
-created and ephemeral volumes are used instead. If this parameter is set, `openshift_logging_elasticsearch_storage_type` is set to `pvc`.
+created and ephemeral volumes are used instead. If you set this parameter, the logging installer sets `openshift_logging_elasticsearch_storage_type` to `pvc`.
+
+|`openshift_logging_elasticsearch_storage_type`
+|Sets the Elasticsearch storage type. If you are using xref:aggregated-logging-persistent-storage[Persistent Elasticsearch Storage], the logging installer sets this to `pvc`.
 
 |`openshift_logging_elasticsearch_storage_type`
 |Sets the Elasticsearch storage type. If you are using Persistent Elasticsearch Storage, set to `pvc`.