1Red Hat EnterpriseLinux 5.5Online Storage GuideFor Red Hat Enterprise Linux 5Red Hat Enterprise Linux EngineeringMike ChristieTom CoughlanDon DomingoRob EversDevelopment CommunityPasi KärkkäinenAbstractThis document outlines the different procedures involved in reconfiguring storage devices while thesystem is running. The document currently addresses iSCSI and Fibre Channel interconnects. Otherinterconnects may be added in future versions of this document.1. Introduction ............................................................................................................................. 21.1. Document Conventions ................................................................................................. 31.2. We Need Feedback! .................................................................................................... 52. Fibre Channel ......................................................................................................................... 62.1. Fibre Channel API ........................................................................................................ 62.2. Native Fibre Channel Drivers and Capabilities ............................................................... 73. iSCSI ..................................................................................................................................... 73.1. iSCSI API .................................................................................................................... 74. Persistent Naming ................................................................................................................... 84.1. WWID .......................................................................................................................... 94.2. UUID and Other Persistent Identifiers .......................................................................... 105. Removing a Storage Device .................................................................................................. 10