HP StorageWorks NAS 8000 User Manual

solution integration

manual

hp StorageWorks NAS 8000

dedicated storage high availability

solution integration manual (SIM)

Product Version: 1.6.0

Edition: March 2003

Part Number: A7418-96021

warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

This document contains proprietary information, which is protected by copyright. No part of this document may be photocopied, reproduced, or translated into another language without the prior written consent of Hewlett-Packard. The information contained in this document is subject to change without notice.

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Printed in the U.S.A.

HP StorageWorks NAS 8000 Dedicated Storage High Availability Solution Integration Manual (SIM) Edition: March 2003 Part Number: A7418-96021

3HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

contents

Contents

About this Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Getting Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

HP Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

HP Storage Website. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

HP Authorized Reseller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

1 HP StorageWorks NAS 8000 Dedicated Storage High Availability Solution Integration . . . . . . . . . . . 7

Read Me First . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Binder Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

2 Solution Integration and

Product Configuration Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3 Network and Storage Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Storage Overview and Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Physical Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Storage Arrays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Logical Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Virtual Array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Logical Unit Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Volume Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

File Volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Directories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Snapshots. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

High Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Clusters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Failover Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Data Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

RAID Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Active Spare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

HA Storage Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Port Designation and Enumeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Integrated Lights-Out (iLO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

NIC Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Contents

4 HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

Planning Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Available Disk Space Spreadsheets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Storage Planning Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

HA Planning Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Network Planning Worksheet Node 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Network Planning Worksheet Node 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

4 Installation Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

1. Review the Planning Worksheets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

2. Check the Contents of Each Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

System Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Shipping Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

3. Rack the Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Safety Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

4. Connect the Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Connect the Array(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Connecting VA7100 Arrays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Connecting VA74xx Series Arrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Connect a Tape Library (optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Connect the Network Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Bonding the Network Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Connect Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

5. Define Basic Network and HA Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Configure the Quorum server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Configure the NAS servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

6. Run the Command View NAS Configuration Wizard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

7. Build the Storage System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Create LUNs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Create Volume Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Create and Start Failover Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Create File Volumes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Assign Shared Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

8. Enable the Software Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Next Steps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Installing Additional Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Using the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Where to Go for Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

5 Safety and Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

about this guide

About this Guide

This installation guide provides information to help you:

■ install your customer’s HP StorageWorks NA S 8000 system.

■ configure your customer’s HP StorageWorks NAS 8000 system.

Intended Audience

This guide is intended for use by system administrators, technicians, and HP on-site service representatives, who are experienced with HP StorageWorks NAS 8000 systems.

Related Documentation

In addition to this guide, HP provides HP StorageWorks NAS 8000 1.6.0 Release Notes.

Document Conventions

The document conventions included in Table 1 apply in most cases.

Getting Help

If you still have a question after reading this guide, contact an HP authorized service provider or access our website:

www.hp.com/support/nas8000

Table 1: Document Conventions

Element Convention

Cross-reference links Blue text: Figure 1 Key and field names, menu items,

buttons, and dialog box titles

Bold

File names, application names, and text emphasis

Italics

User input, command and directory names, and system responses (output and messages)

Monospace font COMMAND NAMES are uppercase

monospace font unless they are case sensitive

Variables <monospace, italic font> Website addresses Blue, underlined sans serif font text:

http://www.hp.com

About this Guide

6 HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

HP Technical Support

In North America, call technical support at 1-800-652-6672, available 24 hours a day, 7 days a week.

Note: For continuous quality improvement, calls may be recorded or monitored.

Outside North America, call technical support at the nearest location. Telephone numbers for worldwide technical support are listed on the HP website under support:

http://thenew.hp.com/country/us/eng/support.html

Be sure to have the following information available before calling:

■ Technical support registration number (if applicable)

■ Product serial numbers (NAS 8000 and arrays in question)

■ Product model names and numbers

■ Applicable error messages

■ Operating system type and revision level (from Command View NAS Identity page)

■ Detailed, specific questions

HP Storage Website

The HP website has the latest information on this product, as well as the latest drivers. Access storage at:

http://thenew.hp.com/country/us/eng/prodserv/

storage.html

. From this website, select the appropriate product or solution.

HP Authorized Reseller

For the name of your nearest HP authorized reseller:

■ In the United States, call 1-800-345-1518

■ In Canada, call 1-800-263-5868

■ Elsewhere, see the HP website for locations and telephone numbers:

http://www.hp.com

7HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

HP StorageWorks NAS 8000 Dedicated Storage

High Availability Solution Integration

Read Me First

This binder includes the details of the integration tasks that Hewlett-Packard or an authorized reseller has performed:

■ The first section, Solution Integration and Product Configuration Overview, gives you a

detailed picture of the solution you ordered from Hewlett Packard. Depending on the system you ordered, and through whom it was purchased, you will either receive system-specific configuration information or sample configuration information.

■ The remaining sections of this binder will be used by you or your installation specialist,

who will work with you to plan and install your HP Network Attached Storage (NAS) 8000 system according to your specific requirements.

Before installing the HP StorageWorks NAS 8000 solution, you must first complete the items in the Network and Storage Planning section of this binder. If your installation specialist has not done so already, he or she will contact you to schedule a joint planning session.

After the planning is complete, your installation specialist will perform tasks specified in this binder’s “Installation Guide” section.

We sincerely hope that you will be delighted with our integration services, and we are looking forward to hearing from you.

HP StorageWorks NAS 8000 Dedicated Storage High Availability Solution Integration

8 HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

Binder Contents

This binder contains the following sections:

Section Audience Purpose

1. HP StorageWorks NAS 8000 Dedicated Storage High Availability Solution Integration

Customer IT administrator Introduction

2. Solution Integration and Product Configuration Overview

Customer IT administrator Product information

3. Network and Storage Planning Installation specialist and customer

IT administrator

Pre-installation planning session

4. Installation Guide Installation specialist Hardware installation and software

configuration

5. Safety Installation specialist and customer

IT administrator

Warnings and regulatory information

9HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

Solution Integration and Product Configuration Overview

This section contains the following documents, which are either sample documents (labeled as such), or were customized for your system and inserted by the Integration Center:

■ Deployment information

■ Rack, server and component configurations

■ Parts list

■ Network, cabling, and power connection diagrams

Figure 1: HP StorageWorks NAS 8000 Racked System

Sample high availability solution shown here.

Solution Integration and Product Configuration Overview

10 HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

Figure 2: Sample Configuration—NAS 8000 dedicated storage HA

For information on NIC ports, see NIC Ports on page 18 of this manual.

11HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

Network and Storage Planning

This section contains pre-planning materials that the installation specialist can re view with the customer before the HP StorageWorks NAS 8000 system arrives onsite.It includes:

■ System Overview, a conceptual overview of the storage system of the HP StorageWorks

NAS 8000 solution, including: — Storage Overview and Terminology — HA Storage Configuration

■ Planning Worksheets, where you can record network and storage settings for the NAS

8000 system. The information in the planning worksheets is required to install and configure the system.

— Determining Available Disk Space — Storage Planning — High Availability Planning —Network Planning

You need to construct an overall storage architecture by:

1. Determining the amou nt of total storage available.

2. Deciding how to allocate it to different groups or functions. Storage space is spread across volume groups. In these volume groups, file volumes di vide the

disk space. It is important to plan storage space prior to creating file volumes. Although the NAS 8000 lets you expand volume groups later, you may want to reserve extra space during setup to allow for the use of the backup process via snapshots (integrated into the user interface). For more information, see Snapshots on page 13.

Network and Storage Planning

12 HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

Storage Overview and Terminology

The NAS 8000 is an easy-to-manage storage solution for heterogeneous environments including Windows, UNIX, and Linux.

The storage space on the NAS 8000 is made up of physical and logical storage:

■ Physical storage refers to the hardware you use for data storage.

■ Logical storage is created by software that organizes your physical storage into file

volumes and directories that are made accessible to users.

In addition, the HA configurations include high-availability features such as redundant hardware and failover packages.

The installation specialist works with the customer to construct an overall storage architecture, determining the total amount of storage available and how it should be allocated to different groups or functions. Data protection, including two RAID levels and active spare settings, should also be considered.

Physical Storage

Storage Arrays

The NAS 8000 Dedicated Storage HA solution uses either the HP Virtual Array 7100, or the HP Virtual Array 74xx series high-performance, high-availability, multi-terabyte storage arrays. One- and two-array configurations are supported.

Logical Storage

Virtual Array

The term “Virtual Array” refers to the way the disks within the array are treated as a pool of data storage blocks instead of real physical disks.

Because data is spread across all of the disks in the array, logical-to-physical data maps keep track of where the data is physically located on the disks in the array . These maps are stored in array controller cache memory. The host has no visibility of the cache data maps; it is simply presented with logical units (LUNs) for data storage operations.

Logical Unit Number

A logical unit number (LUN) is a logical aggregation of space on physical drives. LUNs are unique identifiers that enable the controller to differentiate between separate devices (each of which is a logical unit). Each LUN is a unique number that identifies a specific unit of storage. The NAS 8000 supports up to 128 LUNs in single-array dedicated-storage configurations and as little as 31 LUNs in FC-attach multiple-array configurations.

Volume Groups

A volume group is the aggregation of one or more LUNs. Volume groups combine the space from LUNs and make the space accessible to the file system for creating file volumes and directories, which can then be made accessible to users.

Network and Storage Planning

13HP StorageWorks NAS 8000 Dedicated Storage High Availability, Solution Integration Manual (SIM)

File Volumes

A volume group is divided into one or more file volumes. File volumes are the basic unit of logical storage for a file system on the NA S 8000 . File v olumes can be further subdivided into individual directories.

Directories

Directories let you organize information. Directories contain files or other persistent data structures in a file system that contains information about other files. Directories are usually organized hierarchically and may contain both files and other directories, and are used to organize collections of files for applications or convenience.

Snapshots

A snapshot is a read-only virtual copy of a f ile v ol ume at a specif ic point in time. As such, it is an important part of an overall data-protection plan. Snapshots provide nearly instantaneous access to previous versions of a file stored on the NAS 8000 solution.

When you create a snapshot of a file volume, it initially consumes no physical space. Howe ver , as users modify the file volume, the snapshot tracks all changes between the original file volume and the modified file volume. If an error occurs and a user needs to revert to the previous version, the snapshot version of the file can be restored.

When you create a snapshot, you must allocate storage space in the volume group in which to save the snapshot file v olume. The recommended initial allocation is 10% of the size of the f ile volume on which you are using snapshot.

Keep in mind the following when managing your allocated space:

■ You can increase the amount of space allocated to the snapshot, as long as there is space

available on the volume group.

■ If the allocated space fills during a snapshot’ s e xistence, you can no longer view or extend

the allocated space. An incomplete snapshot has been captured, and therefore, should be deleted. The snapshot will be deleted automatically only upon reboot or package failover.

■ Consider how dynamic your data will be. For file volumes in which data changes rapidly,

snapshots will consume a larger amount of space. At the extreme limit, a file volume can change so much from the original state that the snapshot consumes the same amount of space as the original file volume. Typically, data does not change that rapidly, and the usage and growth of snapshot space is relatively slow.

■ You may also use the autogrow feature, which allows you to allocate a small amount of

space initially, then instruct the system to increase the size of the allocated space on an as-needed basis. Ensure that the autogrow threshold is set low enough that it can keep up with the rate of change in the snapshot files. If the data change rate is greater than the rate at which the autogrow feature is responding, the allocated space can fill up, thereby capturing an incomplete snapshot as described above.

Note: If you take a snapshot of an empty file volume, every file added to that volume will be

duplicated in the snapshot. This will require you to allocate a much larger storage space than you would otherwise need.

Snapshots are optional and may be created at any time after a file volume is created. Users can add or extend snapshots at a later time if there is enough free space available in the volume group.

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High Availability

The NAS 8000 dedicated storage high av ailabi lity solution includes a cluster, or group, of two NAS servers that function as a unified system. It also includes a Quorum server.

The main purpose of high-availability clusters is to provide a higher degree of storage availability to client systems than is possible with a single server. This is accomplished by eliminating single points of failure and providing functional redundancy. Uninterrupted service is provided by failing o ver file serving capabilities (see Failover Packages on page 14) to a secondary server in the event of a failure in the primary server in the cluster.

■ The NAS server s provide failover services for each other.

■ The Quorum server manages the NAS servers, or cluster nodes, and provides cluster

arbitration services that prevent data corruption.

Clusters

HA clusters provide a higher degree of storage availability than is possible with a single serv er . This is provided by:

■ Hardware component redundancy designed to eliminate single points of failure. Each

cluster consists of two NAS servers (nodes) plus one Quorum server. The Quorum server can be shared by multiple NAS Clusters.

■ All storage is grouped into separate units that are given names and are accessible only by

an assigned, unique virtual IP address. These separate units of storage are referred to as failover packages. Storage is assigned to a failover package in units of volume groups. A failover package may have one or more vo lume groups assigned to it.

Note: HP currently supports a two-node cluster for the HP NAS 8000 solution.

See the HP support web site at http://hp.com/support/nas8000 for a technical paper called Configuring and Using an HP NAS 8000 HA Cluster for more information.

Failover Packages

When a package failure is detected, the failover package is halted and fails over to another node, provided that an eligible adoptive node is present. Each failover package and its associated resources are monitored independently. This allows failures that are limited to a single failover package to be handled without affecting the state of other failover packages.

The NAS solution supports two failover models:

■ Active/Active (or “Dual Active”) means that both cluster nodes can be serving data

simultaneously. The nodes provide failover services for each other, but can be fully utilized at all times. This mode is achieved b y configuring failo v er packages to run on both cluster nodes – effectively dividing the storage between the nodes.

■ Active/Passive (or “Single Active”) means that one node is actively serving data while the

other node is in full-time stand-by mode, becoming active only when the other node fails. This mode can be realized by configuring all of the failo ver packages and storage to run on only one node. Without any failover packages to run, the other node waits and monitors the other node for failure.

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Data Protection

RAID Levels

Redundant Array of Inexpensive Disks (RAID) technology uses different industry-standard techniques for storing data and maintaining data redundancy. These techniques, called “RAID levels,” define the method used for distributing data on the disks in a logical unit (LUN). The storage arrays used in the NAS 8000 solution support the following RAID levels:

■ RAID 1+0. RAID 1+0 provides data redundancy and good perform ance. However, the

performance is achieved by using a less efficient technique of storing redu ndant data called “mirroring.” Mirroring maintains two sets of the data: a primary set and a backup set, or “mirror,” of the primary set. Therefore, half of the disk space is consumed by redundant data.

■ AutoRAID. AutoRAID is a combination of RAID 1+0 and 5DP (RAID 5 Double Parity).

RAID 5DP provides data redundancy and improves cost-efficiency by using a more efficient method of storing redundant data. However, there is a performance penalty for each write operation.

AutoRAID relieves you of many of the decisions regarding RAID levels and data location by automatically selecting RAID 1+0 or RAID 5DP depending on the usage patterns of the data. AutoRAID automatically manages your data for you, providing redundancy and high performance with minimal involvement. This configuration eliminates the requirement for the system administrator to understand and configure RAID levels.

Note: The information for AutoRAID presented here applies to VA arrays only.

For additional information on RAID settings, see your storage array user’s guide or search for RAID levels at

http://www.hp.com

Active Spare

The active spare feature in the storage array of fers increased protection against disk f ailure. An active spare ensures that the array can restore data redundancy and performance as quickly as possible following a hard disk failure.

An active spare reserves capacity to perform a rebuild in the event of a disk failure. If you are using disks of different capacities in your array, active spare reserves enough space to rebuild the largest disk. As with logical volumes, the capacity reserved for the active spare is distributed across all the disks in the array; no one physical disk contains the active spare.

Active spare is similar to the dedicated hot spare disks used in some conventional arrays. Howev er, those arrays let the hot spare remain idle until it is needed. This array uses the active spare for RAID 1+0 storage until the spare is needed. This provides the added benefit of enhancing performance while also protecting against disk failure.

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HA Storage Configuration

This section provides suggestions for configuring the storage on an NAS 8000 with high availability (HA) features. For a description of HA, see Physical Storage on page 12.

On a simple dedicated-storage NAS system without HA features, the simplest way to configure the storage is to create a single LUN for the entire array, then create one volume group with multiple file volumes beneath it. Ho we v er, in an HA cluster with two NAS servers, each volume group can be active on only one NAS server, or node, at a time. Therefore, if you are using active/active failover packages (see Failover Packages on page 14), you must create at least two volume groups so each node can access some of your storage.

When determining how many LUNs and volume groups to create, consider the following:

■ A volume group can be active on only one node at a time.

■ A volume group can be assigned to only one failover package.

■ File volumes can’t be split between failover packages or nodes.

■ Multiple volume groups can be assigned to the same failover package.

■ A failover package can only run on one node at a time.

■ The HA cluster is limited to 60 failover packages total (both nodes combined).

■ A package is the smallest unit of failover.

■ A volume group is the smallest unit of storage that can be failed over.

■ If a failover package contains multiple volume groups and a single volume group, file

volume or even share fails, the entire package will be failed over.

■ More failover packages means a higher degree of granularity to balance the failover

packages between the nodes and detect failures.

■ More failover packages also results in higher complexity in the cluster configuration and

requires more virtual IP addresses to keep track of.

■ The failover packages should be divided between the cluster nodes such that the storage

access load (from client systems) will be balanced. This may or may not correspond to balanced storage capacity between the nodes.

The illustrations on the following pages depict common storage configurations:

■ Single array with one LUN and one volume group (for active/passive

failoverconfigurations).

■ Single array with multiple LUNs, volume groups and failover packages.

■ Multiple arrays, LUNs, volume groups and failover packages.

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Figure 3: Single Array with One LUN and One Volume Group for Active/Passive Failover

Figure 4: Single array with Multiple LUNs, Volume Groups and Failover Packages

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Figure 5: Multiple Arrays, LUNs, Volume Groups and Failover Packages

Port Designation and Enumeration

Integrated Lights-Out (iLO)

The server's on-board NIC is dedicated to the Integrated Lights Out (iLO) controller. The iLO is a management chip embedded in the NAS 8000 server. The iLO features are accessed from a network client using a web browser. This allows an administrator to fully control the host server's display (with keyboard and mouse control) from a remote location, regardless of the state of the host server or the host server's operating system. Consequently, you can install, configure, monitor, update, and troubleshoot your NAS 8000 from a desktop located anywhere.

Note: A separate network data line and IP address are required to use the iLO.

NIC Ports

There is a method to NIC port enumeration on the NAS 8000. Understanding these allows the correlation of NIC ports logical names (i.e. ‘ethX’) to physical port locations.

Supported NICs are as follows:

■ NC3134 (138603-B21) Expandable dual-port 10/100 - included in all configurations

■ NC3135 (138604-B21) Dual-port 10/100 upgrade for NC3134

■ NC7770 (244948-B21) Single-port PCI-X gigabit copper

■ NC7132 (153543-B21) Single-port gigabit copper upgrade for NC3134

■ NC6770 (244949-B21) Single-port PCI-X 1000SX gigabit fiber

■ NC6132 (338456-B23) Single-port 1000SX fiber upgrade for NC3134

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The following enumeration table provides information for specific configurations.

Table 2: Enumerations for Various Configurations

PCI Slot 3 Names

Exp

Module

Names PCI Slot 4 Names

Exp

Module

Names

Total Ports

NAS 8000 customer-configuratble options

NC3134 eth0, eth1 Empty - Empty - N/A - 2 NC3134 eth0, eth1 NC7132 eth3 NC7770 eth2 N/A - 4 NC3134 eth0, eth1 NC6132 eth3 NC6770 eth2 N/A - 4 NC3134 eth0, eth1 Empty - NC3134 eth2, eth3 Empty - 4 NC3134 eth0, eth1 NC3135 eth2, eth3 Empty - N/A - 4 NC3134 eth0, eth1 NC3135 eth2, eth3 NC3134 eth4, eth5 Empty - 6 NC3134 eth0, eth1 NC3135 eth2, eth3 NC3134 eth4, eth5 NC3135 eth6, eth7 8 NC3134 eth0, eth1 NC7132 eth3 NC6770 eth2 N/A - 4 NC3134 eth0, eth1 NC6132 eth3 NC7770 eth2 N/A - 4 NC3134 eth0, eth1 Empty - NC7770 eth2 N/A - 3 NC3134 eth0, eth1 NC7132 eth2 Empty - N/A - 3 NC3134 eth0, eth1 Empty - NC6770 eth2 N/A - 3 NC3134 eth0, eth1 NC6132 eth2 Empty - N/A - 3 NC3134 eth0, eth1 NC3135 eth2, eth3 NC7770 eth4 N/A - 5 NC3134 eth0, eth1 NC3135 eth2, eth3 NC6770 eth4 N/A - 5 NC3134 eth0, eth1 NC7132 eth4 NC3134 eth2, eth3 Empty - 5 NC3134 eth0, eth1 NC6132 eth4 NC3134 eth2, eth3 Empty - 5 NC3134 eth0, eth1 Empty - NC3134 eth2, eth3 NC7132 eth4 5 NC3134 eth0, eth1 Empty - NC3134 eth2, eth3 NC6132 eth4 5 NC3134 eth0, eth1 NC3135 eth2, eth3 NC3134 eth4, eth5 NC7132 eth6 7 NC3134 eth0, eth1 NC3135 eth2, eth3 NC3134 eth4, eth5 NC6132 eth6 7 NC3134 eth0, eth1 NC7132 eth6 NC3134 eth2, eth3 NC3135 eth4, eth5 7 NC3134 eth0, eth1 NC6132 eth6 NC3134 eth2, eth3 NC3135 eth4, eth5 7 NC3134 eth0, eth1 NC7132 eth4 NC3134 eth2, eth3 NC7132 eth5 6 NC3134 eth0, eth1 NC6132 eth4 NC3134 eth2, eth3 NC6132 eth5 6 NC3134 eth0, eth1 NC7132 eth4 NC3134 eth2, eth3 NC6132 eth5 6 NC3134 eth0, eth1 NC6132 eth4 NC3134 eth2, eth3 NC7132 eth5 6

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The following figure shows the physical port locations for the supported configurations, as viewed from the back of the NAS server.

Figure 6: Port Locations for Supported Configurations on the NAS Server

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