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Understanding Information Storage and Management: A Comprehensive Guide, Study Guides, Projects, Research of Histology

An in-depth exploration of information storage and management, covering the evolution of storage technology, the importance of data centers, and various storage options and protocols. It serves as a valuable resource for it professionals seeking to expand their knowledge in this field.

What you will learn

  • What is the information lifecycle and why is it important?
  • What are the benefits of network-attached storage (NAS) and IP SAN?
  • What are the key challenges in managing digital information?
  • What are the different types of data and how are they used to derive information?
  • What are the components of a storage system environment?

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Information Storage and Management
Storing, Managing, and Protecting Digital Information
COMPUTERS/
Networking/General
Visit our website at www.wiley.com/compbooks.
http://education.emc.com/ismbook
Storing, Managing, and Protecting Digital Information
Information
Storage and
Management
EMC Education Services
• Challenges and solutions for data storage and data management
Intelligent storage systems
Storage networking (FC-SAN, IP-SAN, NAS)
Backup, recovery, and archive (including CAS)
Business continuity and disaster recovery
Storage security and virtualization
Managing and monitoring the storage infrastructure
EMC Corporation (NYSE: EMC) is the world’s leading developer and provider of information infrastructure technology and solutions
that enable organizations of all sizes to transform the way they compete and create value from their information. Information about
EMC’s products and services can be found at www.EMC.com.
Information Storage and Management
Storing, Managing, and Protecting Digital Information
Managing and securing information is critical to business success. While information storage and management used
to be a relatively straightforward and routine operation in the past, today it has developed into a highly mature and
sophisticated pillar of information technology. Information storage and management technologies provide a variety of
solutions for storing, managing, networking, accessing, protecting, securing, sharing, and optimizing information.
To keep pace with the exponential growth of information and the associated increase in sophistication and complexity of
information management technology, there is a growing need for skilled information management professionals. More
than ever, IT managers are challenged with employing and developing highly skilled information storage professionals.
This book takes an open approach in explaining concepts, principles, and deployment considerations across all tech-
nologies that are used for storing and managing information, rather than any specifi c product. It gives insight into:
EMC Proven Professional is the premier certifi cation program in the information
storage and management industry. Being proven means investing in yourself
and formally validating your knowledge, skills, and expertise by the industry’s
most comprehensive learning and certifi cation program.
This book helps you prepare for Information Storage and Management exam E20-001 leading
to EMC Proven Professional Associate certifi cation. Please visit http://education.emc.com
for details.
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Storing, Managing, and Protecting Digital Information

Information

Storage and

Management

EMC Education Services

Information Storage and Management

Published by Wiley Publishing, Inc. 10475 Crosspoint Boulevard Indianapolis, IN 46256 www.wiley.com

Copyright © 2009 by EMC Corporation

Published by Wiley Publishing, Inc., Indianapolis, Indiana

Published simultaneously in Canada

ISBN: 978-0-470-29421-

Manufactured in the United States of America

10 9 8 7 6 5 4 3 2 1

No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600. Requests to the Publisher for permission should be addressed to the Legal Department, Wiley Publishing, Inc., 10475 Crosspoint Blvd., Indianapolis, IN 46256, (317) 572-3447, fax (317) 572-4355, or online at www.wiley.com/go/permissions.

Limit of Liability/Disclaimer of Warranty: The publisher and the author make no representations or war- ranties with respect to the accuracy or completeness of the contents of this work and specifically disclaim all warranties, including without limitation warranties of fitness for a particular purpose. No warranty may be created or extended by sales or promotional materials. The advice and strategies contained herein may not be suitable for every situation. This work is sold with the understanding that the publisher is not engaged in rendering legal, accounting, or other professional services. If professional assistance is required, the services of a competent professional person should be sought. Neither the publisher nor the author shall be liable for damages arising herefrom. The fact that an organization or Web site is referred to in this work as a citation and/or a potential source of further information does not mean that the author or the publisher endorses the information the organization or Web site may provide or recommendations it may make. Further, readers should be aware that Internet Web sites listed in this work may have changed or disappeared between when this work was written and when it is read.

For general information on our other products and services please contact our Customer Care Department within the United States at (800) 762-2974, outside the United States at (317) 572-3993 or fax (317) 572-4002.

Library of Congress Cataloging-in-Publication Data is available from the publisher.

Trademarks: Wiley and the Wiley logo are trademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates, in the United States and other countries, and may not be used without written permission. All other trademarks are the property of their respective owners. Wiley Publishing, Inc. is not associated with any product or vendor mentioned in this book.

Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not be available in electronic books.

EMC^2 , EMC, EMC Centera, EMC ControlCenter, AdvantEdge, AlphaStor, ApplicationXtender, Avamar, Captiva, Catalog Solution, Celerra, Centera, CentraStar, ClaimPack, ClaimsEditor, ClaimsEditor Professional, CLARalert, CLARiiON, ClientPak, CodeLink, Connectrix, Co-StandbyServer, Dantz, Direct Matrix Architecture, Dis- kXtender, DiskXtender 2000, Document Sciences, Documentum, EmailXaminer, EmailXtender, EmailXtract, eRoom, Event Explorer, FLARE, FormWare, HighRoad, InputAccel, Invista, ISIS, Max Retriever, Navisphere, NetWorker, nLayers, OpenScale, PixTools, Powerlink, PowerPath, Rainfinity, RepliStor, ResourcePak, Retrospect, Smarts, SnapShotServer, SnapView/IP, SRDF, Symmetrix, TimeFinder, VisualSAN, Voyence, VSAM-Assist, WebXtender, where information lives, xPression, xPresso, Xtender, and Xtender Solutions are registered trade- marks and EMC LifeLine, EMC OnCourse, EMC Proven, EMC Snap, EMC Storage Administrator, Acartus, Access Logix, ArchiveXtender, Atmos, Authentic Problems, Automated Resource Manager, AutoStart, Auto- Swap, AVALONidm, C-Clip, Celerra Replicator, CenterStage, CLARevent, Codebook Correlation Technology, Common Information Model, CopyCross, CopyPoint, DatabaseXtender, Digital Mailroom, Direct Matrix, EDM, E-Lab, eInput, Enginuity, FarPoint, FirstPass, Fortress, Global File Virtualization, Graphic Visualization, Infini- Flex, InfoMover, Infoscape, InputAccel Express, MediaStor, MirrorView, Mozy, MozyEnterprise, MozyHome, MozyPro, OnAlert, PowerSnap, QuickScan, RepliCare, SafeLine, SAN Advisor, SAN Copy, SAN Manager, SDMS, SnapImage, SnapSure, SnapView, StorageScope, SupportMate, SymmAPI, SymmEnabler, Symmetrix DMX, UltraFlex, UltraPoint, UltraScale, Viewlets, Virtual Provisioning, and VisualSRM are trademarks of EMC Corporation. All other trademarks used herein are the property of their respective owners. © Copyright 2009 EMC Corporation. All rights reserved. Published in the USA. 01/

iii

G Somasundaram (Somu) is a graduate from the Indian Institute of Technology

in Mumbai, India, and has over 22 years of experience in the IT industry, the

last 10 with EMC Corporation. Currently he is director, EMC Global Services,

leading worldwide industry readiness initiatives. Somu is the architect of EMC’s

open storage curriculum, aimed at addressing the storage knowledge “gap”

that exists in the IT industry. Under his leadership and direction, industry

readiness initiatives, such as the EMC Learning Partner and Academic Alliance

programs, continue to experience significant growth and educate thousands of

students worldwide on information storage and management technologies. Key

areas of Somu’s responsibility include guiding a global team of professionals,

identifying and partnering with global IT education providers, and setting the

overall direction for EMC’s industry readiness initiatives. Prior to his current

role, Somu held various managerial and leadership roles with EMC as well as

other leading IT vendors.

Alok Shrivastava is senior director, EMC Global Services and has focused

on education since 2003. Alok is the architect of several of EMC’s successful

education initiatives including the industry leading EMC Proven Professional

program, industry readiness programs such as EMC’s Academic Alliance, and

most recently this unique and valuable book on information storage technology.

Alok provides vision and leadership to a team of highly talented experts and

professionals that develops world-class technical education for EMC’s employ-

ees, partners, customers, and other industry professionals. Prior to his success

in education, Alok built and led a highly successful team of EMC presales

engineers in Asia-Pacific and Japan. Earlier in his career, Alok was a systems

manager, storage manager, and a backup/restore/disaster recovery consultant

working with some of the world’s largest data centers and IT installations. He

holds dual Masters degrees from the Indian Institute of Technology in Mumbai,

India, and the University of Sagar in India. Alok has worked in information

storage technology and has held a unique passion for this field for most of his

25-plus year career in IT.

About the Editors

v

Acknowledgments

When we embarked upon the project to develop this book, the very first chal-

lenge was to identify a team of subject matter experts covering the vast range

of technologies that form the modern information storage infrastructure.

A key factor working in our favor is that at EMC, we have the technologies,

the know-how, and many of the best talents in the industry. When we reached

out to individual experts, they were as excited as we were about the prospect of

publishing a comprehensive book on information storage technology. This was an

opportunity to share their expertise with professionals and students worldwide.

This book is the result of efforts and contributions from a number of key EMC

organizations led by EMC Education Services and supported by the office of

CTO, Global Marketing, and EMC Engineering.

In addition to his own research and expertise, Ganesh Rajaratnam, from

EMC Education Services, led the efforts with other subject matter experts to

develop the first draft of the book. Dr. David Black, from the EMC CTO office,

devoted many valuable hours to combing through the content and providing

cogent advice on the key topics covered in this book.

We are very grateful to the following experts from EMC Education Services

for developing the content for various sections and chapters of this book:

Rodrigo Alves

Charlie Brooks

Debasish Chakrabarty

Diana Davis

Amit Deshmukh

Michael Dulavitz

Ashish Garg

Dr. Vanchi Gurumoorthy

Simon Hawkshaw

Anbuselvi Jeyakumar

Sagar Kotekar Patil

Andre Rossouw

Tony Santamaria

Saravanaraj Sridharan

Ganesh Sundaresan

Jim Tracy

Anand Varkar

Dr. Viswanth VS

vi Acknowledgments

The following experts thoroughly reviewed the book at various stages and

provided valuable feedback and guidance:

Ronen Artzi

Eric Baize

Greg Baltazar

Edward Bell

Christopher Chaulk

Roger Dupuis

Deborah Filer

Bala Ganeshan

Jason Gervickas

Nancy Gessler

Jody Goncalves

Jack Harwood

Arthur Johnson

Michelle Lavoie

Tom McGowan

Jeffery Moore

Toby Morral

Peter Popieniuck

Kevin Sheridan

Ed VanSickle

We also thank NIIT Limited for their help with the initial draft, Muthaiah

Thiagarajan of EMC and DreaMarT Interactive Pvt. Ltd. for their support in

creating all illustrations, and the publisher, John Wiley & Sons, for their timely

support in bringing this book to the industry.

— G. Somasundaram

Director, Education Services, EMC Corporation

— Alok Shrivastava

Senior Director, Education Services, EMC Corporation

March 2009

  • Section I Storage System Introduction xix
  • Chapter 1 Introduction to Information Storage and Management
    • 1.1 Information Storage
      • 1.1.1 Data
      • 1.1.2 Types of Data
      • 1.1.3 Information
      • 1.1.4 Storage
    • 1.2 Evolution of Storage Technology and Architecture
    • 1.3 Data Center Infrastructure
      • 1.3.1 Core Elements
      • 1.3.2 Key Requirements for Data Center Elements
      • 1.3.3 Managing Storage Infrastructure
    • 1.4 Key Challenges in Managing Information
    • 1.5 Information Lifecycle
      • 1.5.1 Information Lifecycle Management
      • 1.5.2 ILM Implementation
      • 1.5.3 ILM Benefits
      • Summary
  • Chapter 2 Storage System Environment
    • 2.1 Components of a Storage System Environment
      • 2.1.1 Host
      • 2.1.2 Connectivity
      • 2.1.3 Storage
    • 2.2 Disk Drive Components viii Contents
      • 2.2.1 Platter
      • 2.2.2 Spindle
      • 2.2.3 Read/Write Head
      • 2.2.4 Actuator Arm Assembly
      • 2.2.5 Controller
      • 2.2.6 Physical Disk Structure
      • 2.2.7 Zoned Bit Recording
      • 2.2.8 Logical Block Addressing
    • 2.3 Disk Drive Performance
      • 2.3.1 Disk Service Time
    • 2.4 Fundamental Laws Governing Disk Performance
    • 2.5 Logical Components of the Host
      • 2.5.1 Operating System
      • 2.5.2 Device Driver
      • 2.5.3 Volume Manager
      • 2.5.4 File System
      • 2.5.5 Application
    • 2.6 Application Requirements and Disk Performance
    • Summary
  • Chapter 3 Data Protection: RAID
    • 3.1 Implementation of RAID
      • 3.1.1 Software RAID
      • 3.1.2 Hardware RAID
    • 3.2 RAID Array Components
    • 3.3 RAID Levels
      • 3.3.1 Striping
      • 3.3.2 Mirroring
      • 3.3.3 Parity
      • 3.3.4 RAID
      • 3.3.5 RAID
      • 3.3.6 Nested RAID
      • 3.3.7 RAID
      • 3.3.8 RAID
      • 3.3.9 RAID
      • 3.3.10 RAID
    • 3.4 RAID Comparison
    • 3.5 RAID Impact on Disk Performance
      • 3.5.1 Application IOPS and RAID Configurations
    • 3.6 Hot Spares
    • Summary
  • Chapter 4 Intelligent Storage System
    • 4.1 Components of an Intelligent Storage System
      • 4.1.1 Front End
      • 4.1.2 Cache
      • 4.1.3 Back End
      • 4.1.4 Physical Disk
    • 4.2 Intelligent Storage Array Contents ix
      • 4.2.1 High-end Storage Systems
      • 4.2.2 Midrange Storage System
    • 4.3 Concepts in Practice: EMC CLARiiON and Symmetrix
      • 4.3.1 CLARiiON Storage Array
      • 4.3.2 CLARiiON CX4 Architecture
      • 4.3.3 Managing the CLARiiON
      • 4.3.4 Symmetrix Storage Array
      • 4.3.5 Symmetrix Component Overview
      • 4.3.6 Direct Matrix Architecture
    • Summary
  • Section II Storage Networking Technologies and Virtualization
  • Chapter 5 Direct-Attached Storage and Introduction to SCSI
    • 5.1 Types of DAS
      • 5.1.1 Internal DAS
      • 5.1.2 External DAS
    • 5.2 DAS Benefits and Limitations
    • 5.3 Disk Drive Interfaces
      • 5.3.1 IDE/ATA
      • 5.3.2 SATA
      • 5.3.3 Parallel SCSI
    • 5.4 Introduction to Parallel SCSI
      • 5.4.1 Evolution of SCSI
      • 5.4.2 SCSI Interfaces
      • 5.4.3 SCSI-3 Architecture
      • 5.4.4 Parallel SCSI Addressing
    • 5.5 SCSI Command Model
      • 5.5.1 CDB Structure
      • 5.5.2 Operation Code
      • 5.5.3 Control Field
      • 5.5.4 Status
    • Summary
  • Chapter 6 Storage Area Networks
    • 6.1 Fibre Channel: Overview
    • 6.2 The SAN and Its Evolution
    • 6.3 Components of SAN
      • 6.3.1 Node Ports
      • 6.3.2 Cabling
      • 6.3.3 Interconnect Devices
      • 6.3.4 Storage Arrays
      • 6.3.5 SAN Management Software
    • 6.4 FC Connectivity
      • 6.4.1 Point-to-Point
      • 6.4.2 Fibre Channel Arbitrated Loop
      • 6.4.3 Fibre Channel Switched Fabric
    • 6.5 Fibre Channel Ports x Contents
    • 6.6 Fibre Channel Architecture
      • 6.6.1 Fibre Channel Protocol Stack
      • 6.6.2 Fibre Channel Addressing
      • 6.6.3 FC Frame
      • 6.6.4. Structure and Organization of FC Data
      • 6.6.5 Flow Control
      • 6.6.6 Classes of Service
    • 6.7 Zoning
    • 6.8 Fibre Channel Login Types
    • 6.9 FC Topologies
      • 6.9.1 Core-Edge Fabric
      • 6.9.2 Mesh Topology
    • 6.10 Concepts in Practice: EMC Connectrix
    • Summary
  • Chapter 7 Network-Attached Storage
    • 7.1 General-Purpose Servers vs. NAS Devices
    • 7.2 Benefits of NAS
    • 7.3 NAS File I/O
      • 7.3.1 File Systems and Remote File Sharing
      • 7.3.2 Accessing a File System
      • 7.3.3 File Sharing
    • 7.4 Components of NAS
    • 7.5 NAS Implementations
      • 7.5.1 Integrated NAS
      • 7.5.2 Gateway NAS
      • 7.5.3 Integrated NAS Connectivity
      • 7.5.4 Gateway NAS Connectivity
    • 7.6 NAS File-Sharing Protocols
      • 7.6.1 NFS
      • 7.6.2 CIFS
    • 7.7 NAS I/O Operations
      • 7.7.1 Hosting and Accessing Files on NAS
    • 7.8 Factors Affecting NAS Performance and Availability
    • 7.9 Concepts in Practice: EMC Celerra
      • 7.9.1 Architecture
      • 7.9.2 Celerra Product Family
    • Summary
  • Chapter 8 IP SAN
    • 8.1 iSCSI
      • 8.1.1 Components of iSCSI
      • 8.1.2 iSCSI Host Connectivity
      • 8.1.3 Topologies for iSCSI Connectivity
      • 8.1.4 iSCSI Protocol Stack
      • 8.1.5 iSCSI Discovery
      • 8.1.6 iSCSI Names Contents xi
      • 8.1.7 iSCSI Session
      • 8.1.8 iSCSI PDU
      • 8.1.9 Ordering and Numbering
      • 8.1.10 iSCSI Error Handling and Security
    • 8.2 FCIP
      • 8.2.1 FCIP Topology
      • 8.2.2 FCIP Performance and Security
    • Summary
  • Chapter 9 Content-Addressed Storage
    • 9.1 Fixed Content and Archives
    • 9.2 Types of Archives
    • 9.3 Features and Benefits of CAS
    • 9.4 CAS Architecture
    • 9.5 Object Storage and Retrieval in CAS
    • 9.6 CAS Examples
      • 9.6.1 Health Care Solution: Storing Patient Studies
      • 9.6.2 Finance Solution: Storing Financial Records
    • 9.7 Concepts in Practice: EMC Centera
      • 9.7.1 EMC Centera Models
      • 9.7.2 EMC Centera Architecture
      • 9.7.3 Centera Tools
      • 9.7.4 EMC Centera Universal Access
    • Summary
  • Chapter 10 Storage Virtualization
    • 10.1 Forms of Virtualization
      • 10.1.1 Memory Virtualization
      • 10.1.2 Network Virtualization
      • 10.1.3 Server Virtualization
      • 10.1.4 Storage Virtualization
    • 10.2 SNIA Storage Virtualization Taxonomy
    • 10.3 Storage Virtualization Configurations
    • 10.4 Storage Virtualization Challenges
      • 10.4.1 Scalability
      • 10.4.2 Functionality
      • 10.4.3 Manageability
      • 10.4.4 Support
    • 10.5 Types of Storage Virtualization
      • 10.5.1 Block-Level Storage Virtualization
      • 10.5.2 File-Level Virtualization
    • 10.6 Concepts in Practice
      • 10.6.1 EMC Invista
      • 10.6.2 Rainfinity
    • Summary
  • Section III Business Continuity xii Contents
  • Chapter 11 Introduction to Business Continuity
    • 11.1 Information Availability
      • 11.1.1 Causes of Information Unavailability
      • 11.1.2 Measuring Information Availability
      • 11.1.3 Consequences of Downtime
    • 11.2 BC Terminology
    • 11.3 BC Planning Lifecycle
    • 11.4 Failure Analysis
      • 11.4.1 Single Point of Failure
      • 11.4.2 Fault Tolerance
      • 11.4.3 Multipathing Software
    • 11.5 Business Impact Analysis
    • 11.6 BC Technology Solutions
    • 11.7 Concept in Practice: EMC PowerPath
      • 11.7.1 PowerPath Features
      • 11.7.2 Dynamic Load Balancing
      • 11.7.3 Automatic Path Failover
    • Summary
  • Chapter 12 Backup and Recovery
    • 12.1 Backup Purpose
      • 12.1.1 Disaster Recovery
      • 12.1.2 Operational Backup
      • 12.1.3 Archival
    • 12.2 Backup Considerations
    • 12.3 Backup Granularity
    • 12.4 Recovery Considerations
    • 12.5 Backup Methods
    • 12.6 Backup Process
    • 12.7 Backup and Restore Operations
    • 12.8 Backup Topologies
      • 12.8.1 Serverless Backup
    • 12.9 Backup in NAS Environments
    • 12.10 Backup Technologies
      • 12.10.1 Backup to Tape
      • 12.10.2 Physical Tape Library
      • 12.10.3 Backup to Disk
      • 12.10.4 Virtual Tape Library
    • 12.11 Concepts in Practice: EMC NetWorker
      • 12.11.1 NetWorker Backup Operation
      • 12.11.2 NetWorker Recovery
      • 12.11.3 EmailXtender
      • 12.11.4 DiskXtender
      • 12.11.5 Avamar
      • 12.11.6 EMC Disk Library (EDL)
    • Summary
  • Chapter 13 Local Replication Contents xiii
    • 13.1 Source and Target
    • 13.2 Uses of Local Replicas
    • 13.3 Data Consistency
      • 13.3.1 Consistency of a Replicated File System
      • 13.3.2 Consistency of a Replicated Database
    • 13.4 Local Replication Technologies
      • 13.4.1 Host-Based Local Replication
      • 13.4.2 Storage Array–Based Replication
    • 13.5 Restore and Restart Considerations
      • 13.5.1 Tracking Changes to Source and Target
    • 13.6 Creating Multiple Replicas
    • 13.7 Management Interface - EMC SnapView 13.8 Concepts in Practice: EMC TimeFinder and
      • 13.8.1 TimeFinder/Clone
      • 13.8.2 TimeFinder/Mirror
      • 13.8.3 EMC SnapView
      • 13.8.4 EMC SnapSure
    • Summary
  • Chapter 14 Remote Replication
    • 14.1 Modes of Remote Replication
    • 14.2 Remote Replication Technologies
      • 14.2.1. Host-Based Remote Replication
      • 14.2.2 Storage Array-Based Remote Replication
      • 14.2.3 SAN-Based Remote Replication
    • 14.3 Network Infrastructure
      • 14.3.1 DWDM
      • 14.3.2 SONET
        • and EMC MirrorView 14.4 Concepts in Practice: EMC SRDF, EMC SAN Copy,
      • 14.4.1 SRDF Family
      • 14.4.2 Disaster Recovery with SRDF
      • 14.4.3 SRDF Operations for Concurrent Access
      • 14.4.4 EMC SAN Copy
      • 14.4.5 EMC MirrorView
    • Summary
  • Section IV Storage Security and Management
  • Chapter 15 Securing the Storage Infrastructure
    • 15.1 Storage Security Framework
    • 15.2 Risk Triad
      • 15.2.1 Assets
      • 15.2.2 Threats
      • 15.2.3 Vulnerability
    • 15.3 Storage Security Domains xiv Contents
      • 15.3.1 Securing the Application Access Domain
      • 15.3.2 Securing the Management Access Domain
      • 15.3.3 Securing Backup, Recovery, and Archive (BURA)
    • 15.4 Security Implementations in Storage Networking
      • 15.4.1 SAN
      • 15.4.2 NAS
      • 15.4.3 IP SAN
    • Summary
  • Chapter 16 Managing the Storage Infrastructure
    • 16.1 Monitoring the Storage Infrastructure
      • 16.1.1 Parameters Monitored
      • 16.1.2 Components Monitored
      • 16.1.3 Monitoring Examples
      • 16.1.4 Alerts
    • 16.2 Storage Management Activities
      • 16.2.1 Availability management
      • 16.2.2 Capacity management
      • 16.2.3 Performance management
      • 16.2.4 Security Management
      • 16.2.5 Reporting
      • 16.2.6 Storage Management Examples
    • 16.3 Storage Infrastructure Management Challenges
    • 16.4 Developing an Ideal Solution
      • 16.4.1 Storage Management Initiative
      • 16.4.2 Enterprise Management Platforms
    • 16.5 Concepts in Practice: EMC ControlCenter
      • 16.5.1 ControlCenter Features and Functionality
      • 16.5.2 ControlCenter Architecture
    • Summary
  • Appendix
  • Glossary
  • Index

WAN LAN FC SAN Network^ Storage IP

Virtualization Appliance

Host w ith Host w ith 1 HBA Host w ith 2 HBA Tape Library I nternal Storage

Host

RAI D Array JBOD

Control Station

NAS Head Client

FC Director

Storage Array CAS I ntegrated NAS Generic Array w ith ports

Firew all

File System Standard disk LUN Striped disk Logical Volume

iSCSI Bridge

F C I P G a t e w a y FCI P Gatew ay I P Sw itch

I P connectivity

FC connectivity

FC Hub

FC Sw itch

FC Router

I P Router

Icons used in this book

xvii

Foreword

Ralph Waldo Emerson, the great American essayist, philosopher, and poet, once

said that the invariable mark of wisdom is seeing the miraculous in the com-

mon. Today, common miracles surround us, and it is virtually impossible not

to see them. Most of us have modern gadgetry such as digital cameras, video

camcorders, cell phones, fast computers that can access millions of websites,

instant messaging, social networking sites, search engines, music downloads …

the list goes on. All of these examples have one thing in common: they generate

huge volumes of data. Not only are we in an information age, we’re in an age

where information is exploding into a digital universe that requires enhanced

technology and a new generation of professionals who are able to manage,

leverage, and optimize storage and information management solutions.

Just to give you an idea of the challenges we face today, in one year the amount

of digital information created, captured, and replicated is millions of times the

amount of information in all the books ever written. Information is the most

important asset of a business. To realize the inherent power of information, it

must be intelligently and efficiently stored, protected, and managed—so that it

can be made accessible, searchable, shareable, and, ultimately, actionable.

We are currently in the perfect storm. Everything is increasing: the informa-

tion, the costs, and the skilled professionals needed to store and manage it—

professionals who are not available in sufficient numbers to meet the growing

need. The IT manager’s number one concern is how to manage this storage

growth. Enterprises simply cannot purchase bigger and better “boxes” to store

their data. IT managers must not only worry about budgets for storage technol-

ogy, but also be concerned with energy-efficient, footprint-reducing technology

that is easy to install, manage, and use. Although many IT managers intend to

xviii Foreword

hire more trained staff, they are facing a shortage of skilled, storage-educated

professionals who can take control of managing and optimizing the data.

I was unable to find a comprehensive book in the marketplace that provided

insight into the various technologies deployed to store and manage informa-

tion. As an industry leader, we have the subject-matter expertise and practical

experience to help fill this gap; and now this book can give you a behind-the-

scenes view of the technologies used in information storage and management.

You will learn where data goes, how it is managed, and how you can contribute

to your company’s profitability.

If you’ve chosen storage and information infrastructure management as your

career, you are a pioneer in a profession that is undergoing constant change,

but one in which the challenges lead to great rewards.

Regardless of your current role in IT, this book should be a key part of your

IT library and professional development.

Thomas P. Clancy

Vice President, Education Services, EMC Corporation

March 2009