IBM(R) Multipath Subsystem Device Driver Release V1.7.2.0 README for AIX July 31, 2008 ------------------------------------------------------------------------------- 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 SDD 3.0 SDD change history 3.1 Defects Fixed 3.1.1 Common 3.1.2 ESS/DS8000/DS6000 defects 3.1.3 SVC defects 3.2 New Features 3.3 Feature/ Defect Details 3.4 Known issues 3.5 Correction to User's Guide 4.0 User license agreement for IBM device drivers 4.1 Background / Purpose 4.2 Definitions 4.3 License grant 4.4 Responsibilities 4.5 Confidential information 4.6 Limitation of liability 4.7 Termination 4.8 Representations and warranties 4.9 General provisions 4.10 Appendix A 5.0 Notices 6.0 Trademarks and service marks ------------------------------------------------------------------------------- 1.0 About this README file Welcome to IBM Multipath Subsystem Device Driver (SDD). This README file contains the most recent information about the IBM Multipath Subsystem Device Driver, Version 1 Release 7 Modification 2 Level 0 (SDD 1.7.2.0) for AIX. IBM recommends that you go to the following Web site to get the most current information about this release of SDD: http://www.ibm.com/servers/storage/support/software/sdd/ You should carefully review the following information available through the website: 1. The most current README file. This will contain corrections to this readme file, corrections to the SDD User's Guide, and other documentation updates discovered since this copy of the README was prepared. 2. The Multipath SDD User's Guide. Because SDD can be installed in so many different environments / configurations, detailed information about each environment is placed in the appropriate chapter of the Multipath SDD Users Guide. The 'Summary of Changes' section of the SDD Users' Guide can help you quickly determine if the latest changes affect you. 3. The Flashes. As we become aware of any information that is likely to impact a broad set of our customers, Flashes are prepared and posted on this site. You should review this section periodically to see any new Flashes that have been posted since your last review. For prerequisites information, be sure to look in the Multipath SDD User's Guide as well as the prerequisites section of this readme file for the latest updates. 1.1 Who should read this README file This README file is in general intended for storage administrators, system programmers, and performance and capacity analysts. The information in this file only applies to customers who run: 1. DS8000 2. DS6000 3. SAN Volume Controller 4. ESS Please refer to SDD support matrix to determine the supported SDD levels for above storage subsystem. 1.2 How to get help Go to the following Web site for SDD technical support and for the most current SDD documentation and support information: http://www.ibm.com/servers/storage/support/software/sdd/ Go to the following Web site for the IBM ESS Open Systems support: http://www.ibm.com/servers/storage/disk/ess/ Go to the following Web site for IBM TotalStorage DS8000 support: http://www.ibm.com/servers/storage/disk/ds8000/index.html Go to the following Web site for IBM TotalStorage DS6000 support: http://www.ibm.com/servers/storage/disk/ds6000/index.html Go to the following Web site for IBM System Storage SAN Volume Controller support: http://www.ibm.com/servers/storage/support/software/sanvc/ Call one of the following numbers to obtain nontechnical or administrative support, such as hardware and software orders, hardware maintenance, services contract of entitlement, and invoices: .For commercial or state and local support operations: 1-877-426-6006 (Listen to the voice prompts) .For business partner support operations: 1-800-426-9990 .For federal government support operations: 1-800-333-6705 ------------------------------------------------------------------------------- 2.0 Prerequisites for SDD Starting from SDD 1.6.2.0, a unique ID attribute is added to SDD vpath devices, in order to support AIX5.3 VIO future features. AIX device configure methods have been changed in both AIX52 TL08 (52M) and AIX53 TL04 (53E) for this support. Following are the requirements for this version of SDD on AIX5.2 and AIX5.3: AIX52 TL08 & above with PTF U804193 (IY76991) AIX53 TL04 & above with PTF U804397 (IY76997) Prior to installing SDD, you should install the latest version of AIX host attachment script. - For ESS (2105) devices: Install ibm2105.rte. The latest version is 32.6.100.31. Attention: Starting from ibm2105.rte version 32.6.100.21, ESS FC devices will be configured as "IBM FC 2105", as seen from the "lsdev -Cc disk" output. This is changed from "IBM FC 2105XXX", where 'XXX' is the ESS device model, such as F20 or 800. There are two side effects of this change: a) To avoid ODM corruption, you will need to remove all ESS FC hdisks on your host system with the "rmdev" command if you are upgrading from ibm2105.rte version 32.6.100.19 or earlier to ibm2105.rte version 32.6.100.21 or later. b) HACMP processing will fail to bring up volume groups in concurrent mode. In order to work around this issue, the /etc/cluster/conraid.dat HACMP file must be updated to include the following line: 2105*** If the /etc/cluster/conraid.dat HACMP file does not exist, it should be created and contain this line. - For the following devices, install the devices.fcp.disk.ibm.rte package. The latest version is v1.0.0.12. a) DS8000 (2107) b) DS6000 (1750) c) SAN Volume Controller (2145) NOTE: Since SDD v1.6.0.0, host attachment packages for the above devices are consolidated into one package, devices.fcp.disk.ibm.rte. For details, please refer to the Readme files of the host attachment. ------------------------------------------------------------------------------- 3.0 SDD Change History =============================================================================== 3.1 Defects Fixed 3.1.1 Common 4443 (cmvchvt94173) Hung I/O at vpath close when half of paths failed 4444 See if any packaging is already installed on host, before allow new package install 3.1.2 ESS/DS8000/DS6000 defects None 3.1.3 SVC defects None =============================================================================== 3.2 New Features 4427 (OAR 1270) Allow dynamic changing sddsrv daemon path probing interval time =============================================================================== 3.3 Feature/ Defect Details (OAR 1270) Allow dynamic changing sddsrv daemon path probing interval time This feature allows sddsrv's probing interval to be changed dynamically while sddsrv is running. It also allows the user to disable or enable probing. The probing control variable is in sddsrv.conf file. If the probe interval value is set to 0 then probing will be disabled. The default is probing enabled with interval of 1 minute. =============================================================================== 3.4 Known Issues None ================================================================================= 3.5 Correction to User's Guide On Page 29 The description of point #7 should be read as: Start the SDD Server. Enter the following command: startsrc -s sddsrv -e "XPG_SUS_ENV=ON" On Page 65 the description in section "Starting the SDD server manually" should be read as: If the SDD server did not start automatically after you performed the SDD installation, you can start sddsrv by entering startsrc ¨Cs sddsrv -e "XPG_SUS_ENV=ON" On page 66 The description of point #3 should be read as: Comment out following line: srv:2:wait:/usr/bin/startsrc -s sddsrv -e "XPG_SUS_ENV=ON" > /dev/null 2>&1 On page 66 The description of point #4 should be read as: Add following line: srv:2:wait:/usr/bin/startsrc -a s0 -s sddsrv -e "XPG_SUS_ENV=ON" > /dev/null 2>&1 On page 66 The description of point #5 should be read as: Run startsrc -a s0 -s sddsrv -e "XPG_SUS_ENV=ON" to start a stand-alone version of sddsrv ------------------------------------------------------------------------------ 4.0 User license agreement for IBM device drivers NOTICE: PLEASE READ THIS AGREEMENT CAREFULLY BEFORE USING THE PROGRAM AND DOCUMENTATION. IBM(R) WILL ONLY LICENSE THIS PROGRAM AND DOCUMENTATION TO YOU IF YOU FIRST ACCEPT THE TERMS OF THIS AGREEMENT. BY USING THE PROGRAM AND DOCUMENTATION, YOU AGREE TO ABIDE BY THESE TERMS AND APPLICABLE COPYRIGHT LAWS. IBM LIMITS YOUR ACCEPTANCE OF THE PROGRAM AND DOCUMENTATION TO THE TERMS OF THIS AGREEMENT. The Program and Documentation is owned by International Business Machines Corporation or one of its subsidiaries (IBM) or IBM suppliers, and is copyrighted and licensed, not sold. IBM does not transfer title to this Program and Documentation to you. The terms of this Agreement apply to any additional license copy of the Program or Documentation that IBM authorizes you to make. The term "Program" means the original program and all whole or partial copies of it, including portions merged with other programs. A Program consists of machine-readable instructions and related license materials. 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