HP StorageWorks 500 - G2 Modular Smart Array User Manual
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HP StorageWorks 500 - G2 Modular Smart Array User Manual

Hp smart array multipath software user guide
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HP Smart Array Multipath Software

User Guide

December 2005 (Fourth Edition)
Part Number 354907-004

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Summary of Contents for HP StorageWorks 500 - G2 Modular Smart Array

  • Page 1: User Guide

    HP Smart Array Multipath Software User Guide December 2005 (Fourth Edition) Part Number 354907-004...
  • Page 2 © Copyright 2005 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

  • Page 3: Table Of Contents

    Contents Overview............................. 5 Software overview............................. 5 Software distribution ..........................5 Minimum requirements ..........................5 Supported operating systems ........................6 Microsoft feature support ........................6 Linux feature support ........................6 Multiple operating system support...................... 6 Supported four-node configurations ......................6 Two-server external boot configuration ....................6 Two-server internal boot configuration ....................
  • Page 4 Index............................30 Contents 4...

  • Page 5: Overview

    Overview In this section Software overview............................ 5 Software distribution..........................5 Minimum requirements..........................5 Supported operating systems ........................6 Supported four-node configurations ......................6 Software overview Smart Array Multipath software delivers dual path functionality and supports failover capability for a redundant HBA in a server with redundant cabling to an HP StorageWorks Modular Smart Array 500 Generation 2 storage system.

  • Page 6: Supported Operating Systems

    Supported operating systems Supported operating systems include: Microsoft® Windows® 2000 Windows® Server 2003 Linux Red Hat Enterprise Linux UnitedLinux For information about the most current operating system support, errata kernels, and service pack requirements, refer to the HP website (http://www.hp.com/products/sharedstorage). Microsoft feature support Static LUN balancing enables the administrator to optimize I/O by assigning specific volumes to specific paths in the storage system.

  • Page 7: Two-Server Internal Boot Configuration

    Server Port (bus) Boot volume location Data volume location Storage system* Storage system Storage system* Storage system *Red Hat Enterprise Linux operating systems support boot volumes on servers only. For a mixed or external boot configuration in a multiple operating system environment, always locate Linux boot volumes on servers. Two-server internal boot configuration Boot volumes reside on their respective servers, while data volumes reside on the MSA500 G2 storage system.

  • Page 8: Three-Server Internal Boot Configuration

    Server Port (bus) Boot volume location Data volume location Storage system* Storage system Storage system* Storage system Storage system* Storage system *Red Hat Enterprise Linux operating systems support boot volumes on servers only. For a mixed or external boot configuration in a multiple operating system environment, always locate Linux boot volumes on servers. Three-server internal boot configuration Boot volumes reside on their respective servers, while data volumes reside on the MSA500 G2 storage system.

  • Page 9: Installation And Operation In Microsoft Environments

    Installation and operation in Microsoft environments In this section Pre-installation hardware setup for Microsoft....................9 Uninstalling the Smart Array Multipath software driver................10 Installation for an existing 2-node cluster with Microsoft Windows 2000 ............10 Multipath installation for Microsoft......................11 Post-installation hardware setup for Microsoft ....................

  • Page 10: Uninstalling The Smart Array Multipath Software Driver

    Uninstalling the Smart Array Multipath software driver CAUTION: Before uninstalling the software driver in a Microsoft® Windows® Server 2003 clustering environment, use the Cluster Administrator to stop the cluster service on the appropriate node. Power down the server. Disconnect all SCSI cables from any controller in the storage system, unless the boot drive is attached.

  • Page 11: Multipath Installation For Microsoft

    Multipath installation for Microsoft CAUTION: Before installing Smart Array Multipath Software, be sure to uninstall any previous versions of the software and update the HBA and MSA500 G2 controller drivers. Insert the Smart Array Multipath Software CD into the CD-ROM drive of the server. IMPORTANT: If autorun is disabled, run setup.exe from the CD.

  • Page 12: Static Lun Balancing

    To avoid these security messages: Open Internet Explorer 6.0. Select Tools>Internet Options. Select the Security tab. Click Local intranet. Manually set the servers to the Local intranet zone by entering: http://<servername or IP address>:2301 https://<servername or IP address>:2381 Static LUN balancing The Smart Array Multipath software and Microsoft operating system support static LUN balancing.
  • Page 13 From the Multipath Management and Configuration screen, do one of the following: To move all drives from the current path to the redundant path, click the link for the controller and select Switch All Paths. The system moves all drives to the redundant path. To move a drive from one path to the redundant path, click the link for the drive and select Switch Path.

  • Page 14: Installation And Operation In Red Hat Enterprise Linux 2.1 Environments

    Installation and operation in Red Hat Enterprise Linux 2.1 environments In this section Pre-installation configuration for Red Hat Enterprise Linux 2.1..............14 Multipath installation for Red Hat Enterprise Linux 2.1 ................19 Static load (read-only) balancing in Red Hat Enterprise Linux 2.1..............20 Pre-installation configuration for Red Hat Enterprise Linux Before installing Smart Array Multipath software on a server with a Linux Red Hat operating system: Create a new Linux kernel that recognizes the multipath hardware configuration.
  • Page 15 In the EXTRAVERSION field, replace the current value (typically -3.ecustom) by entering: E3.multipath NOTE: Do not use the same name suffix as the active kernel. This naming ensures that any misconfiguration does not harm the current configuration. Overwriting the active .config file IMPORTANT: Before overwriting any file, create a backup of the original file.

  • Page 16: Modifying The Raidtab Configuration File

    Copy the new kernel boot image to the /boot directory (use the Tab key to autocomplete directory names or display possible options). Name the boot image vmlinuz-xxxx where xxxx is the kernel version number with the name you used in the very first step (ex., vmlinuz-2.4.9- Emultipath).
  • Page 17 Sample RAIDTAB configuration file The following raidtab sample file is for a multipath configuration with three partitions (/dev/md0, /dev/md1, and /dev/md2) where each md device represents a partition on the device. If another partition is needed, add it as /dev/md3 with the same characteristics as the preceding partitions. The limit for number of partitions is four primary partitions.
  • Page 18 This command reveals which modules are running. Examining the boot-time messages reveals the static loaded drivers. IMPORTANT: If you have made configuration changes to the kernel (including the multipath or /dev/md driver) and have not rebooted from the new kernel, you must reboot before continuing. Red Hat typically includes the md driver in the kernel.

  • Page 19: Multipath Installation For Red Hat Enterprise Linux 2.1

    To start the RAID device, enter: raidstart /dev/md0 This command can be placed in shutdown scripts in /etc. For more information, refer to the operating system documentation. Pre-installation hardware setup for Red Hat Enterprise Linux 2.1 To prepare for software installation: Complete the MSA500 G2 storage system hardware installation: NOTE: For hardware and option installation procedures, refer to the storage system user guide or the documentation that ships with the option.

  • Page 20: Static Load (Read-Only) Balancing In Red Hat Enterprise Linux 2.1

    Static load (read-only) balancing in Red Hat Enterprise Linux 2.1 The Smart Array Multipath software and Linux operating system support static load (read-only) balancing functionality. To create, add, or extend logical volumes, use ACU Version 7.10 or later. Locate ACU on the SmartStart CD.

  • Page 21: Installation And Operation In Red Hat Enterprise Linux 3.0 And 4.0 Environments

    Installation and operation in Red Hat Enterprise Linux 3.0 and 4.0 environments In this section Pre-installation hardware setup for Red Hat Enterprise Linux 3.0 and 4.0............21 Multipath installation for Red Hat Enterprise Linux 3.0 and 4.0..............21 Post-installation configuration for Red Hat Enterprise Linux 3.0 and 4.0 ............22 Static load (read-only) balancing in Red Hat Enterprise Linux 3.0 and 4.0 ............

  • Page 22: Post-Installation Configuration For Red Hat Enterprise Linux 3.0 And 4.0

    Open a console prompt. Mount the CD-ROM. Change to the Linux directory. List the contents of the directory and select the proper RPM for the current operating system. Install the proper RPM using the following command: #rpm_-Uhv --replacefiles cpq_cciss_<os version> .i686.rpm After successful installation, reboot the server.

  • Page 23: Static Load (Read-Only) Balancing In Red Hat Enterprise Linux 3.0 And 4.0

    1 105 active sync /dev/cciss/c1d0p2 UUID : b1ec5895:5ed49b44:7ec7d4a8:397e19b1 IMPORTANT: You can also review status by running: cat /proc/mdstat Results would look similar to the following: Personalities : [multipath] read_ahead 1024 sectors md0 : active multipath cciss/c2d0p2[0] cciss/c1d0p2[1] 14683328 blocks [2/2] [UU] unused devices : <none>...

  • Page 24: Installation And Operation In Unitedlinux Environments

    Installation and operation in UnitedLinux environments In this section Pre-installation hardware setup for UnitedLinux ..................24 Multipath installation for UnitedLinux ......................24 Post-installation configuration for UnitedLinux..................... 25 Static load (read-only) balancing in UnitedLinux..................26 Pre-installation hardware setup for UnitedLinux To prepare for software installation: Complete the MSA500 G2 storage system hardware installation: NOTE: For hardware and option installation procedures, refer to the storage system user guide or the documentation that ships with the option.

  • Page 25: Post-Installation Configuration For Unitedlinux

    Change to the Linux directory. List the contents of the directory and select the proper RPM for the current operating system. Install the proper RPM using the following command: #rpm_-Uhv --replacefiles cpq_cciss_<os version> .i586.rpm After successful installation, reboot the server. Repeat steps 1 through 7 for each server connected to the MSA500 G2 storage system.

  • Page 26: Static Load (Read-Only) Balancing In Unitedlinux

    cat /proc/mdstat Results would look similar to the following: Personalities : [multipath] read_ahead 1024 sectors md0 : active multipath cciss/c2d0p2[0] cciss/c1d0p2[1] 14683328 blocks [2/2] [UU] unused devices : <none> To format the volume, run: mkfs –t ext2 /dev/md0 To mount the volume, run: mount /dev/md0 /spare_filesystem Configuration is complete.

  • Page 27: Troubleshooting

    Troubleshooting In this section Problem diagnosis ..........................27 Problems during installation ........................27 HBA failure............................28 Cable failure ............................28 Problem diagnosis When a problem exists with the multipath I/O, consult the Insight Management Agents and do one of the following: For Microsoft®...

  • Page 28: Hba Failure

    HBA failure If one of the HBAs in the server fails, the redundant HBA performs all I/O operations. To replace the failed HBA: Power down the HBA in one of the following ways: For a PCI-based HBA in a Microsoft® operating system environment, use the PCI Hot Plug functionality in the server to power down the HBA while the server is online.

  • Page 29: Acronyms And Abbreviations

    Acronyms and abbreviations direct attached storage device manager extension host bus adapter logical block addressing logical unit number Red Hat Package Manager Selective Storage Presentation VHDCI very high density cable interconnect Acronyms and abbreviations 29...
  • Page 30 Index 2-Port Shared Storage Module 5 Linux procedures 14 Linux support 6 4-Port Shared Storage Module 5 Management Agents 27 management pack overview 5 Microsoft browser security settings 11 ACU (Array Configuration Utility) 20, 23 Microsoft procedures 9 Microsoft support 6 minimum hardware configuration 5 multipath operations 12, 20, 23 batteries, replacing 27...
  • Page 31 three-server configurations 8 troubleshooting 27 two-server configurations 7 Index 31...

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