Compaq BL10e - HP ProLiant - 512 MB RAM Manuale utente

Booting HP ProLiant servers from a storage

area network

HOWTO, 2nd edition

Abstract.............................................................................................................................................. 2

Required hardware .............................................................................................................................. 2

Supported firmware versions ............................................................................................................. 2

Supported Fibre Channel switches ..................................................................................................... 2

Setting up LUN on HP StorageWorks arrays and zoning on Fibre Channel switches.................................... 3

Deploying the OS by CD overview ........................................................................................................ 3

Deploying the OS by Rapid Deployment Pack overview ........................................................................... 4

Before you start................................................................................................................................4

Instructions ...................................................................................................................................... 4

Scripted installs................................................................................................................................6

Image deployment ........................................................................................................................... 6

For more information............................................................................................................................ 7

Call to action ...................................................................................................................................... 7

Abstract

Traditionally, HP ProLiant servers boot operating systems (OSs) from internal SCSI and IDE storage

devices. Now, certain HP ProLiant server, StorageWorks Fibre Channel host bus adapter (HBA), and

RAID array combinations support external OS booting. Customers can choose to eliminate server-

based internal boot devices. Booting from an external device decreases downtime by enabling faster

server replacement in the event of a server failure and provides other benefits, including the following:

•Redundant storage paths

•Disaster recovery

•Improved security

•Minimized server maintenance

•Reduced impact on production servers

•Reduced backup time

This paper consolidates available resources with information about booting from SAN, points

customers to vital information, and contains procedures for deploying OSs.

Required hardware

To avoid issues when booting a ProLiant server from a SAN, it is essential to verify that your

hardware configuration supports booting from SAN and that you have the required firmware

installed.

Supported firmware versions

Outdated firmware is a common cause of server problems. Firmware updates provide the latest

available fixes and are essential for optimal system performance and system stability.

For information on the latest firmware versions for server and storage systems, visit the HP website at

http://welcome.hp.com/country/us/en/support.html?jumpid=hpr_R1002_USEN.

Supported Fibre Channel switches

The matrix at

ftp://ftp.compaq.com/pub/products/servers/support/Boot_from_SAN_Fibre_Channel_Switch_Supp

ort_Matrix.pdf lists which ProLiant servers are supported for Fibre Channel switch and HP

StorageWorks array combination that supports booting from SAN.

Verifying compatibility and support among system products can help avoid problems in the future.

Setting up LUN on HP StorageWorks arrays and zoning on

Fibre Channel switches

NOTE:

All supported OSs must be zoned to only have a single path to the

target LUN during an OS install. After installation, a multi-path

driver (MPIO, SecurePath, etc.) must be installed before multiple

paths are presented to the host. This is true for any SAN and any

switch vendor. If the OS is not single-path during the install, the OS

returns various errors.

In boot from SAN configurations, the boot paths must be on the active path to the boot logical unit

number (LUN) and switch zoning must be set up unless directly connected to the array.

The following documents contain information about setting up LUN on HP StorageWorks arrays and

zoning on Fibre Channel switches:

•32-bit Linux systems:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00166137/c00166137.pdf

•Itanium-based Linux systems:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00166110/c00166110.pdf

•Windows Server 2003 and Windows Server x64 edition systems:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00099862/c00099862.pdf

Deploying the OS by CD overview

The following steps provide an overview a CD installation:

1. Download, but do not install, the latest HBA drivers, SmartStart, and the ProLiant Support Pack.

NOTE:

The latest HBA drivers are available at

http://h18006.www1.hp.com/storage/saninfrastructure/hba.

html.

2. Insert the OS CD into the Boot from SAN host system CD-ROM drive and reboot the host system.

The installation begins.

NOTE:

You may be prompted for additional OS CDs or driver diskette

during the installation.

3. Follow the installation instructions that appear on the screen.

4. Load the OS to the Boot LUN on the SAN.

5. When the Installation Complete window appears, press Enter to complete the installation and

reboot the system. This step completes the configuration.

6. Install the latest HBA drivers that you downloaded in Step 1.

Deploying the OS by Rapid Deployment Pack overview

IMPORTANT:

These instructions illustrate how to use Windows Edition 3.00 (or

greater) to deploy an OS on a ProLiant BL server with a QLogic

Fibre Channel Host Bus Adapter (FC HBA) that boots from an HP

StorageWorks Storage Area Network (SAN). If you are using

Windows Edition 1.00, you must upgrade to Windows Edition

3.00.

Before you start

Consult the HP ProLiant Essentials Rapid Deployment Pack – Windows Edition Support Matrix at

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01174425/c01174425.pdf?ju

mpid=reg_R1002_USEN to determine which ProLiant servers and OSs are supported for Boot From

SAN deployment with RDP. Refer to the three support manuals listed in the “Setting up LUN on HP

StorageWorks arrays and zoning on Fibre Channel switches” section for important details about SAN

configurations and minimum firmware versions for boot from SAN.

Instructions

Complete the following steps to deploy the OS using RDP:

1. Ensure that the target server is cabled in a single path configuration (only one active channel). It is

possible to cable both paths and to zone only a single port to have access to the boot LUN until

the server OS install is complete and the multipathing software is installed.

2. Ensure that the server has booted PXE and is waiting in the Deployment Server Console.

3. Provision the SAN storage for the target server to execute the Read ProLiant ML/DL/BL QLogic

HBA Configuration [server specific] job from the Server Deployment Toolbox\1 - Hardware

Configuration\HBA job folder on the target server. This job will create the file

.\lib\hwconfig\hba\ID.ini where ID is the target server’s computer ID. For example, the generated

file might look like this:

[HBA0]

WWID=500508b200713e72

HostAdapterBiosEnable=0 (this should be set to 0 like a new server)

SelectBootEnable=0(this should be set to 0 like a new server)

BootDeviceWWID=

BootDeviceLUN=

[HBA1]

WWID=500508b200713e73

HostAdapterBiosEnable=0

SelectBootEnable=0

BootDeviceWWID=

BootDeviceLUN=

NOTE:

To determine the target server's computer id:

For Windows Edition, right-click on the target server, select

Properties, select General, and then look for the ID field.

For Linux Edition, click on New Computers or All Computers.

Move the mouse cursor over the target server. In the browser

status bar, the computer's ID is shown in the link description as

ID=.

4. Create a LUN for the target server’s boot volume. Notice the WWID of the boot controller and the

LUN number that was created.

5. Using the target server’s HBA WWID from the file created in Step 3, configure the SAN switches

for zoning or Selective Storage Presentation as needed in your environment.

6. Configure the target server’s HBA to boot from the provisioned SAN storage.

7. Edit the file created in Step 3 to add the boot controller WWID and LUN from Step 3. The boot

volume must be set up as the first visible LUN. For example,

[HBA0]

WWID=500508b200713e72

HostAdapterBiosEnable=1

SelectBootEnable=1

BootDeviceWWID=395442c135713a41

BootDeviceLUN=01

[HBA1] WWID=500508b200713e73

HostAdapterBiosEnable=0

SelectBootEnable=0

BootDeviceWWID=395442c135713a42

BootDeviceLUN=01

NOTE:

Use Microsoft WordPad instead of Microsoft Notepad because

Notepad does not read or write the line feeds correctly.

8. Execute the Write ProLiant ML/DL/BL QLogic HBA Configuration [server specific] job from the

Server Deployment Toolbox\1 - Hardware Configuration\HBA job folder on the target server.

9. Execute the Deploy ProLiant BL System Configuration (Boot From SAN) job from the Server

Deployment Toolbox\1 - Hardware Configuration\System job folder on the target server.

This job disables the embedded array controller and put the HBA controller first in the boot order.

Customers who will use local storage as well as SAN must modify the pl-bfs.ini file.

10.Deploy an OS to the target server using any of jobs from the Server Deployment Toolbox\2A - OS

Installation (Imaged) or Server Deployment Toolbox\2B - OS Installation (Scripted) job folders.

Scripted installs

If multiple LUNs are visible to the HBA, by default the Red Hat Linux kickstart file will install Linux

partitions across the available LUNs. In most cases, it is desirable to place the OS partitions on the

first LUN. To do this, copy and rename the desired kickstart file and add the following to the end of

each part command:

--ondisk=sda

On Red Hat Enterprise Linux 3, you must specify the location of the bootloader. To place the grub

bootloader on the first LUN, add the following to the end of the bootloader command in your kickstart

file:

--driveorder=sda

Copy and modify the desired job to point to the modified kickstart file.

Setting up two paths to the LUN (for example, through both HBAs on a blade) will cause an OS

failure due to a drive that is “unformatted, damaged, or formatted with a file system that is

incompatible” or return errors like “Invalid Partition.” The OS must be installed in a single path

configuration. To resolve the issue, either remove one of the HBA cables or set up the SAN switch

zoning to allow access to the LUN from only the first HBA and one array controller port. After the OS

is installed, install the multipathing software and enable the second HBA to access the LUN.

Image deployment

After deploying the first server using scripting, you can deploy additional servers using imaging. To

deploy a server with an embedded array controller to boot from SAN using imaging, you must first

modify the provided image deployment jobs in the Server Replication job folder to eliminate the array

configuration tasks. Copy and rename the appropriate job, and then delete the third and fourth tasks.

For more information

For additional information, refer to the resources listed below.

Source Hyperlink

HP StorageWorks SAN Design

Reference Guide

http://h20000.www2.hp.com/bc/docs/support/SupportM

anual/c00403562/c00403562.pdf

Regular Firmware Updates Essential

for Optimal Performance and

Functionality of HP ProLiant Servers

http://h20000.www2.hp.com/bc/docs/support/SupportM

anual/c00264524/c00264524.pdf

Call to action

Send comments about this paper to: [email protected].

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.

TC070303HT, 3/2007

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