iSCSI_SAN_Configuration_Guide.pdf

iSCSI SAN Configuration Guide

ESX 4.1

ESXi 4.1

vCenter Server 4.1

This document supports the version of each product listed and

supports all subsequent versions until the document is replaced

by a new edition. To check for more recent editions of this

document, see http://www.vmware.com/support/pubs .

EN-000288-01

iSCSI SAN Configuration Guide

You can find the most up-to-date technical documentation on the VMware Web site at:

http://www.vmware.com/support/

The VMware Web site also provides the latest product updates.

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Contents

Updated Information 5

About This Book 7

1 Using ESX/ESXi with an iSCSI Storage Area Network 9

Understanding Virtualization 9

iSCSI SAN Concepts 11

Overview of Using ESX/ESXi with a SAN 16

Specifics of Using SAN Storage with ESX/ESXi 17

Understanding VMFS Datastores 18

Making LUN Decisions 19

How Virtual Machines Access Data on a SAN 21

Understanding Multipathing and Failover 22

Choosing Virtual Machine Locations 27

Designing for Server Failure 27

LUN Display and Rescan 28

2 Configuring iSCSI Initiators and Storage 29

ESX/ESXi iSCSI SAN Requirements 29

ESX/ESXi iSCSI SAN Restrictions 30

Setting LUN Allocations 30

Network Configuration and Authentication 30

Setting Up Independent Hardware iSCSI Adapters 31

Setting Up and Configuring Dependent Hardware iSCSI Adapters 32

Setting Up and Configuring Software iSCSI Adapter 34

Networking Configuration for Software iSCSI and Dependent Hardware iSCSI 36

Bind iSCSI Ports to iSCSI Adapters 40

Using Jumbo Frames with iSCSI 41

Enabling Jumbo Frames for Software and Dependent Hardware iSCSI 42

Configuring Discovery Addresses for iSCSI Initiators 43

Configuring CHAP Parameters for iSCSI Adapters 44

Configuring Additional Parameters for iSCSI 48

iSCSI Session Management 49

Add iSCSI Storage 51

3 Modifying SAN Storage Systems for ESX/ESXi 53

Testing ESX/ESXi SAN Configurations 53

General Considerations for iSCSI SAN Storage Systems 54

EMC CLARiiON Storage Systems 54

EMC Symmetrix Storage Systems 55

Enable HP StorageWorks MSA1510i to Communicate with ESX/ESXi 55

HP StorageWorks EVA Storage Systems 56

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iSCSI SAN Configuration Guide

NetApp Storage Systems 57

EqualLogic Storage Systems 59

LeftHand Networks SAN/iQ Storage Systems 59

Dell PowerVault MD3000i Storage Systems 59

iSCSI Targets in vApps 59

4 Booting from iSCSI SAN 61

General Boot from iSCSI SAN Recommendations 62

Prepare the iSCSI SAN 62

Configure ESX Hosts to Boot from iSCSI SAN 63

iBFT iSCSI Boot Overview 64

Collecting Diagnostic Information for ESXi Hosts 69

5 Managing ESX/ESXi Systems That Use SAN Storage 71

Viewing Storage Adapter Information 71

Viewing Storage Device Information 72

Viewing Datastore Information 74

Resolving Storage Display Issues 75

Path Scanning and Claiming 79

Sharing Diagnostic Partitions 84

Avoiding and Resolving SAN Problems 84

Optimizing SAN Storage Performance 85

Resolving Performance Issues 88

SAN Storage Backup Considerations 91

Managing Duplicate VMFS Datastores 93

Storage Hardware Acceleration 96

A iSCSI SAN Configuration Checklist 99

B VMware vSphere Command-Line Interface 101

resxtop Command 101

vicfg-iscsi Command 101

vicfg-mpath Command 101

esxcli corestorage claimrule Command 102

vmkping Command 102

C Managing Multipathing Modules and Hardware Acceleration Plug-Ins 103

Managing Storage Paths and Multipathing Plug-Ins 103

Managing Hardware Acceleration Filter and Plug-Ins 110

esxcli corestorage claimrule Options 113

Index 115

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Updated Information

This iSCSI SAN Configuration Guide is updated with each release of the product or when necessary.

This table pro vides the update history of the iSCSI SAN Configuration Guide .

Revision Description

EN-000288-01 “ESX/ESXi iSCSI SAN Restrictions,” on page 30 has been updated to clarify multipathing support for

different types of iSCSI adapters.

EN-000288-00 Initial release.

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