Dell PowerVault NX1950 Guía

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Dell™ PowerVault™ NX1950

Cluster Systems

Installation and Troubleshooting

Guide

Notes, Notices, and Cautions

NOTE: A NOTE indicates important information that helps you make better use of

your computer.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data

and tells you how to avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury,

or death.

____________________

Information in this document is subject to change without notice.

Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.

Trademarks used in this text: Dell, the DELL logo, OpenManage, PowerEdge,and PowerVault are

trademarks of Dell Inc.; Microsoft, MS-DOS, Windows, and Windows Server are either trademarks or

registered trademarks of Microsoft Corporation in the United States and/or other countries.

Other trademarks and trade names may be used in this document to refer to either the entities claiming

the marks and names or their products. Dell Inc. disclaims any proprietary interest in trademarks and

trade names other than its own.

November 2007 Rev. A02

Contents 3

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . 7

Overview of MSCS. . . . . . . . . . . . . . . . . . . . . 7

Nodes . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Cluster Resources . . . . . . . . . . . . . . . . . . . . . 8

Resource Group . . . . . . . . . . . . . . . . . . . 8

Quorum Resource . . . . . . . . . . . . . . . . . . . . . 9

Shared Versus Private Storage . . . . . . . . . . . . . . 9

Firewall Port Exceptions . . . . . . . . . . . . . . . . . 9

Configuration Tools . . . . . . . . . . . . . . . . . . . 10

Supported Operating System . . . . . . . . . . . . . . 11

Cluster Administration and Management . . . . . . . . 11

Cluster Administrator . . . . . . . . . . . . . . . . 11

Cluster.exe . . . . . . . . . . . . . . . . . . . . . 11

Other Documents You May Need . . . . . . . . . . . . 12

2 Setting Up Your Cluster . . . . . . . . . . . . . . 13

Configuring Your Cluster. . . . . . . . . . . . . . . . . 13

Prerequisites for Cabling Your Cluster . . . . . . . . . 15

Cabling Your Integrated Solution . . . . . . . . . . . . 16

4Contents

Cabling Your Gateway Solution . . . . . . . . . . . . . 17

PowerVault NX1950 Initial Configuration

Tasks Wizard . . . . . . . . . . . . . . . . . . . . . . . 18

Creating the Cluster . . . . . . . . . . . . . . . . . . . 19

3 Managing Your Cluster . . . . . . . . . . . . . . . 25

Creating a Highly Available File Server Instance . . . . 25

Creating a Highly Available iSCSI Target

Using Microsoft iSCSI Target 3.0 . . . . . . . . . . 26

Creating a Highly Available iSCSI Server

Instance Using Microsoft iSCSI Target 3.1 . . . . . 27

Creating a Shared Storage Disk . . . . . . . . . . 29

Adding a Node Manually . . . . . . . . . . . . . . . . 29

Removing Nodes From the Cluster. . . . . . . . . . . . 32

Removing a Node . . . . . . . . . . . . . . . . . . 32

Removing the Last Node . . . . . . . . . . . . . . 33

Replacing a Node . . . . . . . . . . . . . . . . . . . . 33

Removing the Cluster . . . . . . . . . . . . . . . . . . 34

A Troubleshooting . . . . . . . . . . . . . . . . . . . . 35

B Important Information . . . . . . . . . . . . . . . . 39

Deleting LUNs With Storage Manager for SANs . . . . 39

Dell Storage Initialization Wizard and

Array Name. . . . . . . . . . . . . . . . . . . . . . . . 40

Contents 5

If a Node is Configured With iSCSI LUNs

Before Joining the Cluster, the iSCSI Target MMC

Snap-in Crashes . . . . . . . . . . . . . . . . . . . . . 40

Connection to the iSCSI LUN is Lost When a

Cluster Failover Occurs . . . . . . . . . . . . . . . . . 40

Limitations While Creating a Shared LUN . . . . . . . . 41

Dell Storage Initialization Wizard Does Not Register

the Cluster Node to the PowerVault MD3000

Storage Array if a Dummy Host is Registered . . . . . . 42

Assigning LUNs/Volumes to a Cluster via

Storage Manager for SANs. . . . . . . . . . . . . . . . 42

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

6Contents

Introduction 7

Introduction

This document provides you with information required for configuring the

Dell™ PowerVault™ NX1950 storage system as a cluster solution and offers

troubleshooting tips. The PowerVault NX1950 cluster solution enables two

PowerVault NX1950 nodes to provide highly-available system and data.

Dell supports the following configuration of the PowerVault NX1950 cluster

solution:

• Integrated solution—This solution consists of two PowerVault NX1950

storage systems configured with a Dell PowerVault MD3000 storage array.

• Gateway solution—This solution consists of up to eight PowerVault NX1950

storage systems configured with Dell|EMC storage arrays.

NOTE: Throughout this document, PowerVault NX1950 storage system refers to

the individual cluster node. PowerVault NX1950 cluster solution refers to the

configuration of two or more PowerVault NX1950 storage systems running

Microsoft®Cluster Services (MSCS) attached to either PowerVault MD3000 storage

array or a Dell|EMC storage array.

Overview of MSCS

A cluster is a collection of servers that work together to provide highly- available

resources. Examples of resources include services, IP addresses, network

names, and disk drives. The PowerVault NX1950 cluster solution uses MSCS

and the Dell Storage Initialization Wizard to configure the solution for

clustering. The Dell customized components help the user to integrate the

solution with the services provided by the operating system in a seamless

way to configure the system.

Microsoft Windows®Unified Data Storage Server 2003 provides two

technologies for cluster solutions through MSCS—Server Cluster and

Network Load Balancing (NLB). The PowerVault NX1950 cluster solution

does not support NLB. This guide focuses on the Server Cluster technology

provided by the operating system.

8Introduction

The following list includes basic features of MSCS:

• Highly-available and server consolidation

• Deployable on a single network

• Multiple-node cluster support

NOTE: The multiple-node cluster is supported on PowerVault NX1950 cluster

solution with Windows Unified Data Storage Server 2003, Enterprise x64

Edition operating system only.

For more information about MSCS features and functionality, see the

Microsoft Support website at support.microsoft.com.

Nodes

Nodes or cluster nodes refer to the PowerVault NX1950 storage systems that

are members of the cluster. The PowerVault NX1950 storage solution supports

a multiple-node cluster.

Cluster Resources

The cluster resources are physical or logical entities with the following

characteristics:

• Can be brought online/offline

• Can be managed within a cluster

• Can be hosted by one node within the cluster

Examples of resources are Network Name, IP addresses, services, applications,

and disk storage. During cluster failover, only the cluster resources failover to

another node.

The PowerVault NX1950 cluster solution supports cluster resources and you

can use the cluster administration tools to configure them. For more

information about cluster administration tools, see "Cluster Administration

and Management" on page 12.

Resource Group

A resource group is a group of resources (IP addresses, disk storage) that can

failover as a unit. An example of a resource group is a Highly-Available Server

Instance.

Introduction 9

Quorum Resource

MSCS uses quorum resource to maintain state and configuration information of

the individual nodes and to enforce cluster unity. The quorum-device resource

stores critical information about the cluster nodes and the resources in the

cluster to ensure and manage consistency across both nodes. There are two types

of quorum resources namely: quorum-device and majority-of-nodes cluster.

The quorum-device resource requires a storage class device that is accessible

by the other node in the cluster. The quorum-device resource is typically a

physical disk. The PowerVault NX1950 cluster solution uses a quorum-device

that is located on the storage array.

For information about how to create or select a quorum resource, see

"Assigning the Quorum Disk to the Cluster" on page 31.

Shared Versus Private Storage

The PowerVault NX1950 cluster solution supports two types of storage—

Shared and Private. When you use Shared storage, each node within the

cluster has access to all storage resources. When you use Private storage, only

the individual node has access to the assigned storage resource. To enable the

PowerVault NX1950 configuration as a cluster, the quorum disk must be

deployed on a shared storage disk. The PowerVault NX1950 cluster solution is

deployed as a Shared storage solution by default to ensure that the quorum

disk can be created and mapped to both the nodes in the cluster.

The PowerVault NX1950 cluster solution supports both Private and Shared storage

for the logical unit numbers (LUNs) created after the quorum disk is created.

NOTICE: In the Integrated solution, you can use the Provision Storage Wizard to

configure Shared storage only. For more information, see "Limitations While

Creating a Shared LUN" on page 41.

Firewall Port Exceptions

The PowerVault NX1950 cluster solution is pre-configured from Dell with

Windows Firewall enabled. The port and application exceptions are

configured for deployment, management, and use of the cluster solution.

No user intervention is required to enable exceptions for clustering support.

NOTE: A Windows Firewall Exception is a Microsoft term used to denote ports or

applications that are allowed access through the firewall.

10 Introduction

If the Windows Firewall settings are restored to the default values either due

to user action or because of a system restore, you must reset the firewall port

exceptions for the cluster setup to be successful. Dell provides a batch file

that sets the required port exceptions to deploy, manage, and use the

PowerVault NX1950 cluster solution. For instructions to download and execute

the batch file, see the Dell PowerVault NX1950 Systems Deployment Guide.

NOTICE: Ensure that you perform the procedure described in the

Dell PowerVault NX1950 Systems Deployment Guide to avoid system failure.

Configuration Tools

The following tools assist in the configuration of the storage array and the

Dell PowerVault NX1950 storage systems and enable them to operate as a

cluster.

•The

Dell Storage Initialization Wizard

communicates with the storage

array and ensures that set up is complete.

• The Microsoft Windows Unified Data Storage Server 2003, Enterprise x64

Edition provides the following:

–The

PowerVault NX1950 Initial Configuration Tasks

wizard — This

wizard helps you to configure the PowerVault NX1950 storage system

to be a part of the cluster.

– For cluster administration and troubleshooting, the operating system

provides a graphical user interface (GUI) tool —

Cluster

Administrator (also referred to as Cluadmin.exe)

and a command

line interface (CLI) tool — cluster.exe. For more information about

these tools, see "Cluster Administration and Management" on

page 11.

– Microsoft Cluster Setup tools — The Windows Unified Data Storage

Server 2003, Enterprise x64 Edition provides cluster configuration and

management tools for advanced users. The features of these tools are

beyond the scope of this document. For more information about these

features and functionality, see the Microsoft Support website at

support.microsoft.com

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