Dell EMC PowerVault MD 34XX/38XX Series Storage Arrays Administrator's Guide

When you set up an authentication method, you can choose to create a CHAP secret. The CHAP secret is a password that is recognized by the initiator and the target. If you are using mutual authentication to configure the storage array, you must enter the same CHAP secret that is defined in the host server iSCSI initiator, and you must define a CHAP secret on the target (the storage array) that must be configured in every iSCSI initiator that connects to the target storage array. For more information about CHAP, see Understanding CHAP Authentication in the storage array's Deployment Guide.