Describe the issue: When Upgrading cluster from rhcs 3.x to 4.x rolling update failed saying - msg: Unsupported iscsigws.yml/iscsi-gws.yml setting detected. Remove depreciated iSCSI target, LUN, client, and gateway settings from iscsigws.yml/iscsi-gws.yml. See iscsigws.yml.sample for list of supported settings We need to add instructions to help users to do so Describe the task you were trying to accomplish: Upgrade cluster from 3.x to 4.x with iscsigws configured Suggestions for improvement: Mentioned above Chapter/Section Number and Title: Chapter 7. Upgrading a Red Hat Ceph Storage cluster Product Version: Any other versions of this document that also needs this update: No