IBM(R) Multipath Subsystem Device Driver Version 1.6.0.8 README for Solaris March 3, 2005 ------------------------------------------------------------------------------- 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 defects 3.1.3 SVC defects 3.1.4 SVCCISCO defects 3.2 New Features 3.3 Feature 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 6 Modification 0 Level 8 (SDD 1.6.0.8) for Solaris. 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.html 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 intended for storage administrators, system programmers, and performance and capacity analysts. The information in this file only applies to customers who run: 1. ESS, DS8000, DS6000, SAN Volume Controller, or SAN Volume Controller for Cisco MDS 9000 2. ESS and SAN Volume Controller 3. ESS and SAN Volume Controller for Cisco MDS 9000 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.html Go to the following Web site for the IBM ESS Open Systems support: http://www.storage.ibm.com/hardsoft/products/ess/supserver.htm 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 TotalStorage SAN Volume Controller support: http://www.ibm.com/servers/storage/support/virtual/2145.html Go to the following Web site for IBM TotalStorage SAN Volume Controller for Cisco MDS 9000 support: http://www.ibm.com/servers/storage/support/virtual/2062-2300.html 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 ------------------------------------------------------------------------------- 3.0 SDD Change History =============================================================================== 3.1 Defects Fixed 3.1.1 Common 1. Fixed cfgvpath coredump when there are more than 600 vpathname-to-disk bindings in /etc/vpathsave.cfg. Provided options in rmvpath to remove unused vpathname-to-disk binding. Refer to Multipath SDD User's Guide for detail. 2. "rmvpath -all" will delete all the /dev/[r]dsk/vpath* links after vpath devices are removed. 3. Fixed a rare panic when executing "rmvpath" command. 3.1.2 ESS defects None 3.1.3 SVC defects 1. Update preferred controller information for vpaths when new paths are added using "cfgvpath -r". 3.1.4 SVCCISCO defects 1. Fix a problem of determining preferred paths. 2. Update preferred controller information for vpaths when new paths are added using "cfgvpath -r". =============================================================================== 3.2 New Features 1. Support for DS8000 devices. 2. Support for DS6000 devices. 3. Mark non-preferred paths in 'datapath query device -l'. =============================================================================== 3.3 Feature Details 1. Mark non-preferred paths in 'datapath query device -l' output (PCR 2886). SDD 1.6.0.8 has introduced a new feature to aid users to verify their SAN configurations in which they have preferred/non-preferred controllers in a storage subsystem such SVC and DS6000. For example, if users have 4 paths per SDD vpath device and they would like to configure an equal distribution of paths between preferred controller and non-preferred controller, they will configure their environment with 2 paths from a preferred controller and another 2 paths from the non-preferred one. This feature will help users to verify their configuration by indicating which path is from the non-preferred controller. For 'datapath query device', a new option, '-l', is added to mark the non-preferred paths with an asterisk. This option can be used in addition to the existing datapath query device commands. Here are the examples: datapath query device -l datapath query device -l The following is a sample output of 'datapath query device -l'. # datapath query device 2 -l Dev#: 2 Device Name: vpath1c Type: 2145 Policy: OPTIMIZED Serial: 60050768018B00086800000000000000 Lun Identifier: 60050768018B00086800000000000000 =================================================================================== Path# Adapter H/W Path Hard Disk State Mode Select Error 0* /pci@1f,2000/JNI,FCR@1 sd@e,0:c,raw CLOSE NORMAL 0 0 1* /pci@4,2000/JNI,FCR@1 sd@0,0:c,raw CLOSE NORMAL 0 0 2 /pci@1f,2000/JNI,FCR@1 sd@9,0:c,raw CLOSE NORMAL 0 0 3 /pci@4,2000/JNI,FCR@1 sd@a,0:c,raw CLOSE NORMAL 0 0 =============================================================================== 3.4 Known Issues 1. System may panic if AMCC/JNI HBA driver configuration parameter, TargetOfflineEnable, is set to 1 (default). This applies for JNI HBA driver 5.3.0.x or later. AMCC/JNI adapters have a configuration parameter, TargetOfflineEnable, which enables target offline when target port fails. By default, TargetOfflineEnable is set to 1. SDD requires this feature to be disabled to avoid some rare system panics. Users should modify the AMCC/JNI configuration file (/kernel/drv/jnic146x.conf) to disable this feature by setting TargetOfflineEnable=0. 2. Uninstalling SDD may hang on a single CPU system This problem only occurs with SDD 1.6.0.7 or SDD 1.6.0.8 on a single CPU system. Workaround: Please follow the procedure below to uninstall SDD 1.6.0.7 or SDD 1.6.0.8 on a single CPU system: a. delete file /kernel/drv/sparcv9/vpathdd if the system is running on a 64 bit kernel or delete file /kernel/drv/vpathdd if the system is running on a 32 bit kernel b. reboot the system c. run "pkgrm IBMsdd" to remove SDD 1.6.0.7 or SDD 1.6.0.8 package ================================================================================= 3.5 Correction to User's Guide None ------------------------------------------------------------------------------ 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. 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