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Introduction 5

Introduction

This document provides information for installing and managing your

Dell™ PowerEdge™ blade server in a Dell PowerEdge cluster system and

specific information about clustering your PowerEdge blade server modules

with supported Dell PowerVault™, Dell EqualLogic™, and Dell/EMC storage

systems. Use this document in conjunction with the Installation and

Troubleshooting Guide for your supported Dell PowerEdge cluster solution.

This document is intended for experienced IT professionals who need to

configure the cluster solution, and for trained service technicians who

perform upgrade and maintenance procedures.

Overview

Clustering uses specific hardware and software to join multiple systems

together to function as a single system and provide an automatic failover

solution. If one of the cluster nodes (also referred to as nodes) fails, resources

running on the failed system are moved (or failed over) to one or more

systems in the cluster either by Microsoft

Windows Server

2003 Cluster

Server (MSCS), Windows Server 2008 Failover Clustering, or Windows

Server 2008 R2 Failover Clustering software. Cluster nodes share access to

external storage systems; however, only one of the nodes can own any virtual

disk or Logical Unit Number (LUN) in the external storage system at any

time. The cluster software controls which node has access to each virtual disk

in the shared storage system.

NOTE: Throughout this document, MSCS refers to either Microsoft Cluster Server

or Microsoft Failover Clustering.

When the failed system is repaired and brought back online, resources

automatically transfer back (or fail back) to the repaired system or remain on

the failover system, depending on how MSCS is configured. For more

information about MSCS, see the Installation and Troubleshooting Guide.

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