README v3.02 for DM-MPIO Configuration file for IBM RSSM Dec 19, 2011 ---------------------------------------------------------------------------- CONTENTS 1.0 About this README file 1.1 Who should read this README file 1.2 How to get help 2.0 Prerequisites for Multipath Configuration File 3.0 Change History 4.0 Supported IBM Storage Servers 5.0 Installation and Usage. 6.0 Notice 7.0 Trademarks and service marks ----------------------------------------------------------------------------- 1.0 About this README file This README file contains the most recent information about the Red Hat Enterprise Linux Server 5 (RHEL 5) and SUSE(R) Enterprise Linux Server 10 (SLES 10) DM-MPIO configuration file multipath.conf for IBM BladeCenter S SAS RAID Controller (RSSM) 1.1 Who should read this README file This README file is intended for storage administrators, system programmers, and performance and capacity analysts. The information in this file only applies to customers who run IBM RSSM 1.2 How to get help Go to the following Web site for IBM RSSM support: http://www.ibm.com/systems/support/supportsite.wss/brandmain?brandind=5000020 2.0 Prerequisites for Multipath Configuration File For RHEL 5: - the minimum level required is RHEL 5.2 - the "in-box" kernel-mode device mapper multipath module device-mapper-1.02.24-1.el5 in RHEL 5.2 - the "in-box" userspace multipath-tools device-mapper-multipath-0.4.7-17.el5 in RHEL 5.2 For SUSE 10: - The minimum level required is SLES 10.2 - the "in-box" kernel-mode device mapper multipath module device-mapper-1.02.03-6.14 in SLES 10.2 - the "in-box" userspace multipath-tools multipath-tools-0.4.7-34.38 in SLES 10.2 3.0 Change History v3.01: First version for IBM RSSM support. V3.02: change "no_path_retry" parameter from "fail" to "queue" for RSSM 4.0 Supported IBM storage Servers IBM RSSM 5.0 Installation and Usage The file needs to be copied into the "/etc" directory. Make a backup of any existing /etc/multipath.conf before copying in this file. If this file is copied to the "/etc" directory after the device mapper multipath driver and multipath-tools daemon are started, you will have to run the "multipath" command from the command line to reload the settings from the multipath.conf file. 6.0 Notices This information was developed for products and services offered in the U.S.A. IBM may not offer the products, services,or features discussed in this document in other countries. Consult your local IBM representative for information on the products and services currently available in your area. Any reference to an IBM product, program, or service is not intended to state or imply that only that IBM product, program, or service may be used. 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