This bug has been copied from bug #592736 and has been proposed to be backported to 5.5 z-stream (EUS).
Fixed in iscsi-initiator-utils-6.2.0.871-0.19.el5.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2010-0721.html
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Previously, iscsiadm did not contain a discovery mode with an update option. This prevented vdsm to discover targets with CHAP (Challenge-Handshake Authentication Protocol) authentication. This update adds a iscsiadm discoverydb mode ('iscsiadm -m discoverydb') which fixes this issue and can be used to create, store and edit discovery records.