Quantum DLTtape DLT 2000 Bedienungsanleitung

FROM QUANTUM CORPORATION

Quantum®

DLTtape™Handbook

Your Complete Guide to Today’s

Hottest Storage Technology

Eighth Edition

Notice

Editor

Peter McGowan

g•m marketing

communications

Associate Editor

Stephen Weekley

Quantum Corporation

Senior Writer

Hank Giles

g•m marketing

communications

Art Director

Christine Koch

Knockout Graphics

Illustrator

Steve Hussey

QUANTUM CORPORATION

501 Sycamore Drive

Milpitas, CA 95035

1-800-624-5545

www.quantum.com or www.DLTtape.com

Quantum and the Quantum logo are trademarks of Quantum Corporation, registered in the U.S.A.

and other countries. DLTtape,the DLTtape logo,Super DLTtape, and the Super DLTtape logo are

trademarks of Quantum Corporation. Products mentioned herein are for identification purposes

only and may be trademarks or registered trademarks of their respective companies. Quantum is not

responsible for typographical, editorial, or pictorial errors in this publication. Product specifications

and technical information are subject to change without notice.

Foreword

The world of data storage has changed a great deal since we pub-

lished the first Quantum DLTtape™Handbook in 1997. In just this

short time, the role of storage has evolved dramatically. It has

become clear that effective storage strategies are fundamental to

the success of virtually any information technology strategy,

whether it’s in re-energized smokestack industries or e-commerce.

Since the first Quantum DLTtape Handbook, we now have pub-

lished a total of eight editions, plus two editions in Japanese and

one in Chinese.And,while the roles of storage and DLTtape tech-

nology have changed and evolved with incredible speed, the

objective of the handbook is still much the same as it was original-

ly: to educate our various audiences by providing an in-depth look

at DLTtape system technology and a comprehensive overview of

DLTtape products and solutions. The book will also give you a

context for understanding how storage technology has evolved into

such an integral part of enterprise IT strategy, and the role

DLTtape technology plays.

The most notable change in the content of this eighth edition is

the inclusion of extensive information on the new Super DLTtape™

technology, the next generation of DLTtape technology. Super

DLTtape technology delivers dramatic increases in DLTtape speed

and capacity, while continuing the DLTtape commitment to com-

patibility with previous generations of drives and media.

Incorporating a number of important technology innovations,

Super DLTtape technology promises to broaden the role of the

QUANTUM DLTtape HANDBOOK iii

DLTtape system as the dominant tape technology for backup,

recovery, archiving, vaulting, near on-line storage, and multi-

media storage hierarchies.

Because Super DLTtape technology is the newest development in

DLTtape systems,we have included in this edition of the handbook

a great deal of new information specific to Super DLTtape technolo-

gy. However, it is important to emphasize that, while Super DLTtape

technology includes a number of breakthrough innovations, it is

not a“new”technology: it is an extension of all the concepts that

have made the DLTtape systems so successful since the original

linear tape technology was introduced in 1985.So when we use the

term“DLTtape systems”or“DLTtape technology”throughout this

book, we refer to all DLTtape technology, including Super DLTtape

technology, and the entire DLTtape family of products, including

the newest Super DLTtape drives and media.

Welcome to the eighth edition of the Quantum DLTtape

Handbook,and to the exciting possibilities of a whole new

generation of Super DLTtape systems.

FOREWORD

Contents

Chapter

— Introduction

— 1. The Evolving Tape Storage Market

— 2.What is the DLTtape System?

— 3. History of DLTtape Technology

— 4.Why Customers Want the DLTtape System

— 5. Reliability: The Heart of the DLTtape System

— 6. Demystifying Tape Drive Specs

— 7. DLTtape Media

— 8.Automation

— 9. Horizontal Applications

— 10.Vertical Market Applications

— 11. DLTtape System Technology Compared

— 12. Evaluating the Cost of a DLTtape Backup Solution

— 13. Platform Connectivity & Software Compatibility

— 14. Storage Management Software

— 15. Firmware

— 16. Using the DLTtape System

— 17. Super DLTtape: The Future of DLTtape Technology

— Appendix A: Super DLTtape System Products

and DLTtape System Products

— Glossary

— Index

Page

vii

1.1

2.1

3.1

4.1

5.1

6.1

7.1

8.1

9.1

10.1

11.1

12.1

13.1

14.1

15.1

16.1

17.1

A.1

G.1

I.1

QUANTUM DLTtape HANDBOOK v

Introduction

This handbook will introduce you to one of the dominant forces in

mid-range storage technology – the DLTtape systems,including the

new Super DLTtape systems.These systems are the acknowledged

market-share leaders in mid-range tape backup and archiving, thanks

to their remarkable performance,reliability, and storage capacity.

Convergence Emergence

Why has a seemingly mundane topic like backup and archiving

become such a hot subject in recent years? There are several

answers.A number of trends are converging to create a new and

seemingly limitless hunger for faster, higher capacity storage back-

up systems. These trends include:

•The growth of Internet, Intranet, and e-commerce

applications, many of which require constant backup of very

large databases.

•The popularity of storage-intensive applications like multi-

media, data warehousing, video editing, medical imaging,

financial analysis, and engineering.

•Centralized backup management of distributed,

networked systems.

•Exponential increases in hard disk capacity and performance.

QUANTUM DLTtape HANDBOOK vii

•A shrinking“window”for backup and archiving.

•The emergence of enterprise level storage management

strategies, including Storage Area Networks.

In this handbook,we will show you why DLTtape and Super DLTtape

drives and media are the best storage solutions for these and many of

the other storage challenges you may face.We will also help you eval-

uate your DLTtape storage options and pick the solution that’s right

for you.

We’ve Got You Covered

To help you understand DLTtape technology and how it fits into

your IS backup picture, we’ve included chapters that cover every-

thing from the history of DLTtape drives and media to a detailed

comparison of competitive backup solutions. Here’s a sample of

what we’ll cover:

•What is the DLTtape system?

• What is Super DLTtape technology?

•Why customers want DLTtape drives and media – the

DLTtape system.

•Applications for the DLTtape system.

•What makes the DLTtape system so reliable?

•Why the DLTtape system is perfect for autoloaders, libraries,

and Storage Area Networks (SANs).

•What makes DLTtape cartridges special.

•Platform connectivity considerations.

•The bright future of Super DLTtape technology.

Welcome to the new world of storage management.Welcome to

the world of the DLTtape and Super DLTtape systems from

Quantum Corporation.

INTRODUCTION

viii

The Evolving

Tape Storage Market

QUANTUM DLTtape HANDBOOK

1.1

Before we plunge into the story of the DLTtape system, we need

some context. Who’s buying DLTtape drives and media? And, more

importantly,WHY? In this chapter, we’ll walk you through some of

the market forces that are impacting the industry, including:

•Trends in computing systems: moving away from centralized

computing, toward a client/server model.

•Moving to centralized management of distributed systems.

•Growth of mission critical, leading edge applications.

•Dramatic advances in tape technology for backup.

Market Size

The market for tape drives is projected at $6 billion a year for the

next few years, with unit shipments holding steady at about 4 mil-

lion per year, worldwide. Almost all of those 4 million units are going

to be used for backup.

But,while unit shipments will remain steady,the amount of data that

needs to be backed up is growing rapidly.For example,it is estimated

that in 1999 worldwide server capacity,one important category of data

that needs to be backed up, was less than 500 petabytes (Figure 1.1).By

2004,that figure will have multiplied to over 4,300 petabytes!

THE EVOLVING TAPE STORAGE MARKET1.2

With the projected amount of data that needs to be backed up climb-

ing at a rapid rate,and the projected growth in tape drive units shipped

staying relatively flat,each of those backup tape drive units must deliv-

er more capacity than ever before.Analysts project that there may be

the potential for a melt-down if the backup technology does not keep

up with that sharply rising demand curve.The continual evolution of

DLTtape technology and the dramatic increase in capacity and perfor-

mance delivered by Super DLTtape technology are a direct response to

this need.What factors are driving this rising demand for backup

capacity? Let’s start with computer systems trends.

From Mainframe to Client/Server

The deployment of client/server systems is accelerating. From 1994

to 1996,the percentage of organizations that said they were actually

using client/server systems grew from 25 to 44 percent. Today,

client/server is the dominant mainstream approach to enterprise

500

1,500

1,000

2,000

2,500

3,000

3,500

4,000

4,500

1999 2000 2001 2002 2003 2004

Centralized

Network

Centralized

Administration

Distributed

Workgroups

SOHO

Networks

Worldwide Server Capacity (in Petabytes)

Source: Strategic Research Corp., Network Demographics, 2000

Figure 1-1 Worldwide Server Capacity is one measure of data to be

backed up. The figure is climbing at a much steeper rate than the rate of

tape shipments. Backup capacity must increase to match increased storage

demands in this and other categories.

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