IBM Enterprise Storage Server 2105 E10, Enterprise Storage Server 2105 E20, Enterprise Storage Server 2105 F10, Enterprise Storage Server 2105 F20 Introduction And Planning Manual

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IBM Enterprise Storage Server

™

Introduction and Planning Guide 2105 Models E10, E20, F10, and F20

IBM

GC26-7294-05

IBM Enterprise Storage Server

™

Introduction and Planning Guide 2105 Models E10, E20, F10, and F20

IBM

GC26-7294-05

Note!

Before using this information and the product it supports, read the information in “Notices” on page 95.

Sixth Edition (December 2000)

This edition replaces GC26–7294–04.

Publications are not stocked at the address given below. If you want additional IBM publications, ask your IBM representative or write to the IBM branch office serving your locality.

A form for your comments is provided at the back of this document. If the form has been removed, you may address comments to:

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US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.

Contents

Figures ...........................vii

Tables ............................ix

Safety and environmental notices .................xi

Product recycling ........................xi

Disposing of products.......................xi

About this guide .......................xiii

Who should use this guide ....................xiii

Frequently used terms ......................xiii

Publications ..........................xvi

The ESS product library ....................xvi

Ordering publications .....................xvii

Related publications......................xvii

Web sites...........................xix

Summary of Changes .....................xxi

Chapter 1. Introduction......................1

IBM Enterprise Storage Server overview ................1

Host systems supported by the ESS ................2

Web interfaces ........................4

Service interface........................9

Fibre-channel connection ....................10

Introducing the IBM Subsystem Device Driver ............12

IBM Enterprise Storage Server availability features ...........14

Redundant array of independent disks implementation .........14

Non-RAID disk group support ..................15

Predictive failure analysis ....................15

Failover protection ......................15

Sparing...........................15

Fibre-channel support .....................15

Cache ...........................16

Nonvolatile storage ......................16

Concurrent maintenance ....................16

FlashCopy .........................16

Peer-to-Peer Remote Copy ...................17

FlashCopy and PPRC restrictions for open system hosts ........18

UNIX, Windows NT, and Windows 2000 availability features .......18

System/390 availability features..................19

Descriptions and comparisons of the IBM Enterprise Storage Server models 20

Power differences between models ................21

Features ..........................21

Logical subsystems .......................23

Chapter 2. Planning the physical configuration ............25

United States-government orders ..................25

Power features .........................25

Power outlets ........................25

Uninterruptible power system...................26

Power supply input voltage ...................26

Power cables ........................26

Remote support features ....................26

Extension cords .......................28

Adapter features ........................29

SCSI host adapters ......................30

Fibre-channel host adapters ...................30

ESCON host-adapters .....................30

Device adapters .......................30

Reserved loops........................31

Memory capacity features .....................31

Physical configuration features and options ..............31

DDM cages and 8 packs ....................32

Physical configuration options ..................32

ESS storage on demand ....................34

Feature codes and requirements for attaching 7133 drawers ........36

Connection hardware ......................37

SCSI host cables .......................37

Fibre-channel cables......................38

ESCON host cables ......................38

Remote-power-control attachment cables ..............39

Language for the operator panel ..................39

Configuration changes ......................40

Optional one-year warranty ....................40

Licensed internal code and optional software ..............40

Parallel Access Volumes (PAV) ..................40

ESS Copy Services ......................40

Guidelines for enabling and using ESS Web Copy Services .......41

Planning ESS Copy Services configuration .............45

IBM Subsystem Device Driver ..................46

Chapter 3. Installation planning ..................49

Equipment requirements .....................49

Engineering changes.......................50

Site requirements for the ESS ...................50

Service clearance and floor-loading requirements for the ESS ......55

Planning for installation of the ESSNet ...............57

Power requirements .......................58

Input voltages and frequencies ..................58

Power consumption and environmental information ..........58

Cooling requirements .....................59

Operating environment ......................59

Power on environment .....................59

Power off and storage environments ................60

Recommended storage points or ranges ..............60

Energy saving law.......................60

Power cable and power connector requirements ............60

Power cable connectors ....................61

Outlet power for the extension cord ................63

Remote service connection ...................63

Chapter 4. Planning for communication ...............65

Communication overview .....................65

Guidelines for completing the Communication Resources work sheet .....65

Communications for ESS Web Copy Services .............73

Disaster Recovery Considerations for Copy Services ..........76

Chapter 5. Planning data migration ................79

iv ESS Introduction and Planning

UNIX, Windows NT, Windows 2000 and OS/400 host systems .......79

Replacing existing storage.....................80

Reformatting existing disk drive modules ..............80

524-byte sector format .....................80

Open system host views of the IBM Enterprise Storage Server .......81

OS/400 operating systems ...................81

UNIX systems ........................81

System/390 hosts ........................82

Data migration planning ....................82

IBM data migration and other services ...............82

Appendix A. Communication Resources work sheet ..........85

Appendix B. Communication Resources (ESS Web Copy Services) work

sheet ...........................89

Appendix C. Adding and Removing Drawers and Racks ........91

Drawer Placement .......................91

7133 Model 20 Requirements ..................91

Model D40 Requirements ....................92

7133 Model 020 and D40 Requirements for 2105 Installations .......93

Notices ...........................95

Trademarks ..........................95

Electronic emission notices ....................96

Federal Communications Commission (FCC) statement .........96

Industry Canada compliance statement ...............97

European community compliance statement .............97

Japanese Voluntary Control Council for Interference (VCCI) class A statement 98

Korean government Ministry of Communication (MOC) statement .....98

Taiwan class A compliance statement ...............98

IBM agreement for licensed internal code ...............98

Actions you must not take ....................99

Statement of Limited Warranty...................100

Part 1 – General Terms ....................100

Part 2 - Country-unique Terms..................102

Glossary ..........................107

Index ............................119

Contents v

vi ESS Introduction and Planning

Figures

1. Models E10, E20, F10, and F20; front and rear views..................2

2. Expansion enclosure, front and rear views ......................2

3. Connecting to ESS Web Copy Services server groups .................8

4. Point-to-point topology .............................10

5. Switched fabric topology ............................11

6. Arbitrated loop topology ............................12

7. Multipath connections between a host server and ESS LUNs ..............13

8. Reserved loops ...............................31

9. Cable cutout and door clearance for Models E10, F10, E20, and F20 ...........53

10. Cable cutout and door clearance for Model 100 ...................54

11. ESS Web Copy Services configuration with DNS ...................74

viii ESS Introduction and Planning

Tables

1. Power differences between ESS models ......................21

2. IBM Enterprise Storage Server feature comparison ..................21

3. IBM Enterprise Storage Server physical features ...................22

4. Ultra-high-performance configuration .......................33

5. High-performance configurations .........................33

6. Capacity configurations ............................34

7. High-performance Configurations with 18.2 GB DDMs .................35

8. Capacity Configurations with 36.4 GB DDMs ....................36

9. ESCON cable connectors ...........................38

10. Remote-power-control attachment cable connectors ..................39

11. ESS dimensions and weights ..........................51

12. Cable cutout dimensions (maximum size) ......................52

13. Clearance and floor-loading requirements......................55

14. ESS input voltages and frequencies ........................58

15. Power consumption and environmental information for the ESS .............58

16. Operating extremes with the power on .......................59

17. Recommended operating points with the power on ..................59

18. Recommended operating ranges with the power on ..................60

19. Recommended temperatures and humidity with the power off ..............60

20. Recommended temperatures and humidity while in storage ...............60

21. ESS power cable connectors ..........................61

22. Communication Resources work sheet.......................85

23. Enable ESS Web Copy Services work sheet ....................89

24. Enable ESS Web Copy Services without DNS work sheet................89

x ESS Introduction and Planning

Safety and environmental notices

This section contains information about:

v Safety notices that are used in this guide

v Environmental guidelines for this product

To find the translated text for a danger or caution notice:

1. Look for the identification number at the end of each danger or caution notice. In the following examples, look for the numbers 1000 and 1001.

DANGER

A danger notice indicates the presence of a hazard that has the potential of causing death or serious personal injury.

1000

CAUTION: A caution notice indicates the presence of a hazard that has the potential of causing moderate or minor personal injury.

1001

2. Find the number that matches in the GC26-7229.

IBM Storage Solution Safety Notices

book,

Product recycling

This unit contains recyclable materials. Recycle these materials at your local recycling sites. Recycle the materials according to local regulations. In some areas, IBM provides a product take-back program that ensures proper handling of the product. Contact your IBM representative for more information.

Disposing of products

This unit may contain batteries. Remove and discard these batteries, or recycle them, according to local regulations.

xii ESS Introduction and Planning

About this guide

This publication introduces the IBM®Enterprise Storage Server™(ESS) and lists the features you can order. It also gives guidelines for the following tasks:

v Planning for installation v Planning communications v Planning data migration

Who should use this guide

This publication is for storage administrators, system programmers, and performance and capacity analysts.

Frequently used terms

The following terms appear in this publication to describe the IBM Enterprise Storage Server (ESS) and its configuration. Also see the “Glossary” on page 107 for additional terms and definitions.

Term Definition array An arrangement of related disk drive modules

(DDMs) that you have assigned to a group. Also referred to as a rank. For the ESS, an array is a group of up to eight DDMs.

cluster A partition of a storage server that is capable of

performing all functions of a storage server. When a cluster fails in a multiple-cluster storage server, the cluster that remains in the configuration takes over the processes of that cluster.

controller image A System/390

you access with an ESCON more controller images exist in each controller. Each image appears to be an independent controller, but all images share a common set of hardware facilities. The ESS can emulate 3990-3, 3990-6, or 3990-3 TPF controller images.

count key data (CKD) A System/390 term for a logical device that

specifies the format of the logical data units on the device. The logical data unit is a track that contains one or more records, consisting of a count field, a key field (optional), and a data field (optional).

device adapter A physical component of a storage controller that

attaches to one or more interfaces. It enables communication between the interfaces and the associated storage devices.

destage The process of writing modified storage from cache

to the disk drive module (DDM).

term for a logical subsystem that

I/O interface. One or

disk drive module (DDM) The primary, nonvolatile storage medium that you

use for any host data that is stored within a storage server. The number and type of storage devices within a storage server may vary.

Enterprise Systems Connection architecture (ESCON)

1. An ESA/390 computer-peripheral interface. The I/O interface uses ESA/390 logical protocols over a serial interface.

2. A set of IBM products and services that provide a dynamically connected environment within an enterprise.

ESCON See

Enterprise Systems Connection architecture

ESCON channel A channel that has an ESCON channel-to-controller

I/O interface that uses optical cables as a transmission medium.

ESCON host systems System/390 hosts that you attach to the ESS with

an ESCON adapter. Such host systems run on Multiple Virtual Storage (MVS), virtual machine (VM), VSE, or TPF operating systems.

fabric In fibre-channel technology, a routing structure,

such as a switch, receives addressed information and routes to the appropriate destination. A fabric can consist of more than one switch. When multiple fibre-channel switches are interconnected, they are

cascaded

fibre-channel Fibre-channel is an architecture that supports

full-duplex communication over a serial interface that configures attached units to a communication fabric.

The ESS supports fibre-channel communications for open system hosts through its fibre-channel adapters.

fixed-block (FB) devices An architecture for logical devices that specifies the

format of the logical data units on the device. The logical data unit is a block. All blocks on the device are the same size (fixed size); the subsystem can access them independently. This is the required format of the logical data units for host systems that you attach with a small computer system interface (SCSI) or fibre-channel interface.

gigabyte (GB) When referring to hard-disk-drive capacity, GB

host adapter A physical component in a storage server that

IBM Enterprise Storage Server (ESS)

xiv ESS Introduction and Planning

means 1 000 000 000 bytes; total user-accessible capacity may vary depending on operating environment.

enables the server to attach to one or more host I/O interfaces.

™

A member of the Seascape

product family of storage servers and attached storage devices (disk drive modules). The ESS provides integrated caching and RAID support for the disk drive modules (DDMs). The DDMs are attached through a serial storage architecture (SSA) interface.

logical device A pointer to a logical volume on a storage server.

The pointer enables a host system to access the logical volume. For the ESS, the logical device represents a logical volume.

logical subsystem (LSS) The LSS is a logical “container” for RAID-5 arrays,

disk groups, and the volumes that are located on those arrays or disk groups. One SSA Adapter accesses an LSS primarily. One or more logical subsystems can exist on the ESS. In general, the ESS associates a given set of devices with only one logical subsystem.

For System/390 hosts, a logical subsystem represents a controller.

logical unit The Small Computer System Interface (SCSI) term

for a logical disk drive.

logical unit number (LUN) LUN is a SCSI term for the field in an identifying

message that is used to select a logical unit on a given target.

logical volume The storage medium associated with a logical disk

drive. A logical volume typically resides on one or more storage devices. For the ESS, you define this unit of storage; the logical volume resides on a RAID-5 array, and is spread over6+Por7+P drives, where P is parity. A logical volume can also reside on a non-RAID array on one storage device.

For CKD, you can define the logical volume size by the device emulation mode (3390 or 3380 track format). For UNIX Microsoft Windows 2000 fixed-block format, the size is 0.5 GB to 224 GB. For AS/400

, Microsoft®Windows NT®, and

operating systems in the

operating systems in the fixed-block

format, the size is 4.19, 8.59, 17.55, or 36 GB.

Note: The AIX

operating system views a logical volume as a logical disk or a hard disk (hdisk).

SCSI See

small computer system interface

SCSI host systems Identifies host systems that you attach to the ESS

with a SCSI interface. Such host systems run on UNIX, OS/400, Windows NT, Windows 2000, or Novell NetWare operating systems.

SCSI ID A unique identifier (ID) assigned to a SCSI device

that is used in protocols on the SCSI interface to identify or select the device. The number of data bits on the SCSI bus determines the number of available SCSI IDs. A wide interface has 16 bits, with 16 possible IDs. A SCSI device is either an initiator or a target.

service personnel Individuals or a company that you have authorized

to service your ESS. This term also refers to a

About this guide xv

service provider, a service representative, or an IBM service support representative (SSR). An IBM SSR installs your ESS.

Small Computer System Interface

An American National Standards Institute (ANSI) standard for a logical interface to computer peripherals and for a computer-peripheral interface. The interface uses a SCSI logical protocol.

staging To move data from an offline or low-priority device

to an online or higher priority device is called staging.

storage server A unit that manages attached storage devices and

provides access to the storage or storage-related functions for one or more attached hosts.

terabyte (TB) When referring to hard-disk-drive capacity, TB

means 1 000 000 000 000 bytes; total user-accessible capacity may vary depending on operating environment.

volume Refers to a

Publications

This section describes the ESS library and publications for related products. It also gives ordering information for these publications.

The ESS product library

The ESS is an IBM Seascape architecture-based product. See the following publications for more information on the ESS:

IBM Enterprise Storage Server Introduction and Planning Guide

This guide introduces the product and lists the features you can order. It also provides guidelines on planning for the installation and configuration of the ESS.

IBM Enterprise Storage Server User’s Guide

| |

This guide provides instructions for setting up and operating the ESS and for analyzing problems.

IBM Enterprise Storage Server Host Systems Attachment Guide

This book provides guidelines for attaching the ESS to your host system and for migrating from SCSI to fibre-channel attachment.

IBM Enterprise Storage Server SCSI Command Reference

This book describes the functions of the ESS. It provides reference information for UNIX and Application System/400 commands, sense bytes, and error recovery procedures.

IBM Enterprise Storage Server System/390 Command Reference

This book describes the functions of the ESS and provides reference information for System/390 hosts, such as channel commands, sense bytes, and error recovery procedures.

IBM Storage Solutions Safety Notices

This book provides translations of the danger notices and caution notices that IBM uses in ESS publications.

IBM Enterprise Storage Server Web Interface User’s Guide

logical

(AS/400®) hosts, such as channel

, GC26-7229

volume.

, GC26-7294

, SC26-7295

, SC26-7296

, SC26-7297

, SC26-7298

, SC26-7346

xvi ESS Introduction and Planning

This book provides instructions for using the IBM StorWatch™Enterprise Storage Server Web interfaces, ESS Specialist and ESS Web Copy Services.

IBM Enterprise Storage Server Configuration Planner

This book provides work sheets for planning the logical configuration of the ESS. This book is not available in hardcopy. This book is only available on the following Web site:

www.storage.ibm.com/hardsoft/products/ess/refinfo.htm

IBM Enterprise Storage Server Quick Configuration Guide

This booklet provides flow charts for using the StorWatch Enterprise Storage Server Specialist. The flow charts provide a high-level view of the tasks the IBM service support representative performs during initial logical configuration. You can also use the flow charts for tasks that you might perform during modification of the logical configuration.

The hardcopy of this booklet is a 9-inch × 4-inch fanfold.

| |

| | |

IBM Enterprise Storage Server Service Guide

This service guide is for the service support representatives who are trained to install and repair the IBM 2105 Models E10/E20 and F10/F20. This service guide is broken into three volumes that contain the following chapters:

– Volume 1: Information, Start, and Isolation – Volume 2: Repair, Install, and Configure – Volume 3: Locations, Service Terminal, Codes, Power

, SY27–7605

, SC26-7353

, SC26-7354

Ordering publications

All of the publications that are listed in “The ESS product library” on page xvi are available on a compact disc that comes with the ESS, unless otherwise noted. You can also order a hardcopy of each publication. For publications on compact disc, order

All the customer documents listed above are available on the following ESS Web site:

Related publications

The following related publications are also available:

DFSMS/MVS®Version 1 Release 5 Software Support for the IBM Enterprise Storage Server

This book describes the changes you need to make to operating systems for System/390 hosts to support the ESS functions.

IBM Storage Area Network Data Gateway Installation and User’s Guide, 2108 Model G07

This book introduces the IBM Storage Area Network (SAN) Data Gateway and provides the procedures for installing and using it.

IBM Subsystem Device Driver

This book describes how to use the IBM Subsystem Device Driver on open-systems hosts to enhance performance and availability on the ESS. The Subsystem Device Driver creates redundant paths for shared logical unit numbers. The Subsystem Device Driver permits applications to run without interruption when path errors occur. It balances the workload across paths, and it transparently integrates with applications.

IBM Enterprise Storage Server Customer Documents

www.storage.ibm.com/hardsoft/products/ess/refinfo.htm

, SC26-7318

, SC26-7304

, SK2T-8770.

About this guide xvii

This publication is not available in hardcopy. However, it is available on the compact disc that is delivered with your ESS. You can also view and copy this publication from the Web site:

www.ibm.com/storage/support/techsup/swtechsup.nsf/support/sddupdates/

DFSMS Advanced Copy Services

, SC35-0355

This book provides detailed information about Copy Services functions such as Peer-to-Peer Remote Copy (PPRC), Extended Remote Copy (XRC), and FlashCopy.

| |

| | | | | |

OS/390 MVS System Messages Volume 1 (ABA - ASA)

This publication helps you understand and use IBM Advanced Copy Services functions on an IBM System/390. It describes two dynamic-copy functions and several point-in-time copy functions. These functions provide backup and recovery of data should a disaster occur to your data center. The dynamic-copy functions are Peer-to-Peer Remote Copy and Extended Remote Copy, and are known collectively as remote copy. FlashCopy, SNAPSHOT Copy are the point-in-time copy functions.

IBM Enterprise Storage Server

, SG24-5465

, and Concurrent

This book, from the IBM International Technical Support Organization, introduces the IBM Enterprise Storage Server (ESS) and provides an understanding of its benefits. It also describes in detail the architecture, hardware and functions of the ESS.

Implementing the IBM Enterprise Storage Server

, SG24-5420

This book, from the IBM International Technical Support Organization, can help you install, tailor, and configure the IBM Enterprise Storage Server (ESS) in your environment.

IBM Enterprise Storage Server Performance Monitoring and Management

SG24-5656. This book, from the IBM International Technical Support Organization, provides

guidance on the best way to configure, monitor, and manage your Enterprise Storage Server (ESS) to ensure optimum performance.

IBM System/360™and System/370™I/O Interface Channel to Control Unit Original Equipment Manufactures’ Information

, GA22-6974

This publication provides a description of the interface between System/360, System/370, and System/390 channels and controllers that are designed to operate with this interface. This publication covers the parallel I/O interface. It does not cover the interface between the controller and the I/O device, nor does it cover the ESCON-I/O interface for the System/390.

This publication is for designers of programs and equipment that are associated with parallel I/O interfaces and for service personnel that maintain the equipment. Anyone concerned with the functional details of this interface will also find it useful.

Fibre Transport Services (FTS) Direct Attach, Physical and Configuration

Planning

, GA22-7234

This publication provides information about fibre-optic and ESCON-trunking systems.

DFSMS/MVS Version 1 Remote Copy Guide and Reference

, SC35-0169

This publication provides guidelines for using remote copy functions with System/390 hosts.

Implementing ESS Copy Services on S/390

, SG24-6480

This publication tells you how to install, customize and configure Copy Services on IBM Enterprise Storage Server on a S/390 host system. Copy Services

xviii ESS Introduction and Planning

Web sites

functions include, Peer-to-Peer Remote Copy, Extended Remote Copy, FlashCopy, and Concurrent Copy. This publication describes the functions, pre-requisites and co-requisites. The publication also describes how to implement each of the functions into your environment.

Implementing ESS Copy Services on UNIX and Windows NT

This publications tells you how to install, customize, and configure Copy Services on an IBM Enterprise Storage Server on the UNIX and Windows NT host system. Copy Services functions include, Peer-to-Peer Remote Copy, FlashCopy, Extended Remote Copy, and Concurrent Copy. Extended Remote Copy and Concurrent Copy are not available for UNIX and Windows NT host systems. They are only available on System/390. This publication describes the functions, pre-requisites and co-requisites. The publications also shows you how to implement each of the functions into your environment. This publications also shows how to implement these solutions in an HACMP cluster.

NUMA-Q ESS Integration Release Notes

This publication contains information about special procedures and limitations involved in running ESS with Copy Services on a NUMA-Q host system. It is not available through IBM ordering systems. Contact your IBM NUMA-Q sales representative to obtain this document

For general information about IBM storage servers, see the following Web site: v www.storage.ibm.com/hardsoft/products/ess/ess.htm

, Part Number 1003-80094-01

, SG24-5757

To view and print the IBM Enterprise Storage Server publications, see the following Web site:

v www.storage.ibm.com/hardsoft/products/ess/refinfo.htm To get current information about the host system models, operating systems, and

adapters that the ESS supports, see the following Web site: v www.storage.ibm.com/hardsoft/products/ess/supserver.htm

For information about the IBM Subsystem Device Driver, see the following Web site:

www.ibm.com/storage/support/techsup/swtechsup.nsf/support/sddupdates/

To attach a SAN or host system that uses an industry-standard, fibre-channel arbitrated loop (FC-AL) through the IBM 2108 SAN Data Gateway Model G07, see the following Web site:

www.storage.ibm.com/hardsoft/products/sangateway/sangateway.htm

For information about the latest updates to Copy Services components XRC, PPRC, SnapShot, Concurrent Copy, and FlashCopy for S/390, see the following Web site:

www.storage.ibm.com/software/sms/sdm/sdmtech.htm

About this guide xix

xx ESS Introduction and Planning

Summary of Changes

Revision bars in the left margin indicate technical changes to this publication. Minor

| | | | | | | | | |

editorial changes are not marked. This edition includes the following major changes:

v Support for the new IBM System/390 eserver zSeries 900 (z900 server) v Feature codes for a SCSI cable with an additional interposer v Feature codes for step-ahead storage planning v Modification to the ESS weight information v Additional information about the environment for storing an ESS v Modifications to the information about planning for ESS Copy Services v New fields for the Communication Resources work sheet:

– Support Catcher Telephone Number – Enable ESS Copy Services commands for IBM System/390 volumes

v A new work sheet for Network Communications for ESS Copy Services

xxii ESS Introduction and Planning

Chapter 1. Introduction

This book provides an overview of the IBM Enterprise Storage Server (ESS) and lists the features that you can order. It also provides guidelines for these tasks:

v Installation planning v Communications planning v Data migration planning

For guidelines and work sheets for logical configuration, see the

Storage Server Configuration Planner

http://www.storage.ibm.com/hardsoft/products/ess/refinfo.htm

IBM Enterprise Storage Server overview

This section provides an overview of the IBM Enterprise Storage Server (ESS) and describes its interfaces and components.

The ESS is a member of the Seascape family of storage servers. The ESS provides integrated caching and support for redundant arrays of independent disks (RAID) for the disk drive modules (DDMs). The DDMs are attached through a serial storage architecture (SSA) interface.

The ESS uses peripheral component interconnect (PCI) architecture that is designed to provide high availability and to avoid single points of failure.

| | |

The ESS Models E10 and E20 provide 6 GB of cache. The ESS Models F10 and F20 provide 8 GB of cache; an optional 16 GB of cache; and faster PCI architecture.

The ESS provides the following features:

v RAID 5 or non-RAID disk groups v Fast SSA drives v Fast reduced instruction-set computer (RISC) processors v A fault-tolerant system v Sharing of storage between open-systems hosts

v OS/390 v Instant copy solutions v Disaster recovery solutions

parallel input/output (I/O) interface

IBM Enterprise

on the product Web site:

Models E20 and F20, with expansion enclosures, can provide up to 11 terabytes (TB) of storage capacity, with a choice of 9.1, 18.2, or 36.4 GB DDMs. When IBM refers to DDM capacity, TB means 1 000 000 000 000 bytes. For processor storage, real and virtual, a TB equals 2⁴⁰ or 1 099 511 627 766 bytes. Total user-accessible capacity may vary depending on the operating environment.

See Figure 1 on page 2 and Figure 2 on page 2 for illustrations of the ESS models and the expansion enclosure. ESS Models E10 and F10 do not support an expansion enclosure.

Front view

Figure 1. Models E10, E20, F10, and F20; front and rear views

Rear view

Each ESS expansion enclosure has dual power cables and redundant power. The redundant power system allows both the storage controller and DDMs to continue normal operation when one of the power cables is inactive. Redundancy also ensures continuous data availability.

Figure 2. Expansion enclosure, front and rear views

ESS Models E10 and F10 support a maximum of 64 DDMs. The minimum configuration for a Model E10 or F10 base enclosure is 16 DDMs. ESS Models E20 and F20 support a maximum of 128 DDMs. With the expansion enclosure, Models E20 and F20 support a maximum of 384 DDMs.

Host systems supported by the ESS

The ESS provides heterogeneous data storage that you can share between workloads for open-systems hosts. The following sections contain information about:

v Open-systems hosts with small computer system interface (SCSI) adapters

2 ESS Introduction and Planning

Front view

Rear view

v Open-systems hosts with fibre-channel adapters

Note: Because of possible interactions between host bus adapters in switched

configurations, IBM recommends that you establish zones that contain a single port attached to a host bus adapter with the desired number of ports attached to ESS. You can establish the zones by using either the hard (by port) or soft (by WWN) zoning method. You can configure ports that are attached to the ESS in more than one zone, which allows multiple host bus adapters to share access to the ESS fibre-channel ports. Shared access to an ESS fibre-channel port might be from host platforms that use a combination of supported host bus adapter types and operating systems.

SCSI host systems

Each SCSI adapter has two ports. With SCSI adapters you can connect up to 128 host systems when you serially interconnect them. The ESS supports the following host systems for SCSI attachment:

v Hewlett Packard with the HP-UX operating system

v IBM RISC System/6000

system

v IBM AS/400 with the IBM Operating System/400 (OS/400) Version 3 or Version 4 v Personal computer servers with Microsoft Windows NT 4.0 operating systems v Personal computer servers with Microsoft Windows 2000 operating systems v Sun with the Solaris operating system v Data General with the DG UX operating system v Personal computer servers with Novell Netware

and RISC System/6000 SP with the IBM AIX operating

See the following ESS Web site for details about types, models, adapters, and the operating systems that the ESS supports for SCSI-attached host systems:

www.storage.ibm.com/hardsoft/products/ess/supserver.htm

Fibre-channel host systems

Each ESS fibre-channel adapter has one port. With fibre-channel adapters you can connect up to 127 host systems. See “Fibre-channel connection” on page 10 for information on the fibre-channel protocols that the ESS supports. The ESS supports the following host systems for fibre-channel attachment:

v IBM RISC System/6000 and RISC System/6000 SP with the IBM AIX operating

system

v Personal computer servers with Microsoft Windows NT 4.0 operating systems v Personal computer servers with Windows 2000 operating systems v IBM NUMA-Q with DYNIX/ptx

| | |

v Hewlett Packard with the HP-UX operating system v Personal computer servers with Novell NetWare v Sun with the Solaris operating system

See the following ESS Web site for details about types, models, adapters, and the operating systems that the ESS supports for fibre-channel attached host systems:

www.storage.ibm.com/hardsoft/products/ess/supserver.htm

Chapter 1. Introduction 3

System/390 host systems

With ESCON adapters, the ESS supports up to 32 connections for System/390 host systems, each with up to 64 logical paths. IBM attaches an ESS to a System/390 server for fibre-channel connection (FICON 9032 Model 005 ESCON Director.

The ESS supports the following operating systems:

v OS/390 v Multiple Virtual Storage/Enterprise Storage Architecture (MVS/ESA v Virtual Machine/Enterprise Storage Architecture (VM/ESA®) v Virtual Storage Extended/Enterprise Storage Architecture (VSE/ESA™) v Transaction Processing Facility (TPF)

The ESS also supports the following operating systems for the new IBM eserver zSeries 900 (z900 server):

v z/OS Version 1 Release 1 v OS/390 Version 2 Release 6 or higher v VM

– z/VM Version 3 Release 1 – VM/ESA Version 2 Release 2 – VM/ESA Version 2 Release 3 – VM/ESA Version 2 Release 4

v VSE/ESA Version 2 Release 3 and higher v Transaction Processing Facility (TPF) Version 4 Release 1

™

) through the bridge card on the IBM

™

)

| | |

Web interfaces

| | |

See the preventive service planning (PSP) bucket for operating system support and planning information that includes APARs and programming temporary fixes (PTFs).

For additional information about the changes you need to make to System/390 hosts to support ESS functions, see

Support for the IBM Enterprise Storage Server

DFSMS/MVS Version 1 Release 5 Software

For information about the latest updates to Copy Services components XRC, PPRC, SnapShot, Concurrent Copy, and FlashCopy for S/390, see the following Web site:

www.storage.ibm.com/software/sms/sdm/sdmtech.htm

This section describes the Web security, the ESSNet, and the Web interfaces for ESS. The Web interfaces include:

v StorWatch Enterprise Storage Server Specialist (ESS Specialist) v StorWatch Enterprise Storage Server Web Copy Services (ESS Web Copy

Services) that supports Web Interfaces to manager peer-to-peer remote copy or FlashCopy.

v StorWatch Expert, an optional software product See your IBM Field office for information about how to order StorWatch Expert. See

IBM Enterprise Storage Server Web Interface User’s Guide

the

which provides detailed descriptions of the ESS Specialist and the ESS Web Copy Services interfaces and how to use them.

4 ESS Introduction and Planning

Web connection security

You connect to the ESS through the ESSNet. All data that is sent between the ESS and the Web browser through the ESSNet is

encrypted to avoid unauthorized modification of configuration commands. Passwords and authorization levels protect access to the interface.

You control user access by assigning levels of access and passwords.

IBM Enterprise Storage Server Network

The IBM Enterprise Storage Server Network (ESSNet) is a private network resident on an IBM workstation. It is a required feature. IBM installs the ESSNet when they install your IBM Enterprise Storage Server. The ESSNet hardware includes:

v The IBM workstation (a PC) and monitor v An external Ethernet hub that provides cable connections from the ESSNet to the

IBM Enterprise Storage Server. The hub speed is 10 megabits per second (Mbps) or 10/100 megabits per second, depending on your system.

Note: You can attach your Ethernet LAN to the external hub. You provide any

hardware that is needed for this connection.

v A modem and a modem expander that allow your ESS to communicate between

you and IBM Note: The feature code for Remote Service Support includes the modem and

modem expander.

The ESSNet includes the following software on the workstation:

v Windows NT 4.0 operating system v Browser software (Microsoft Internet Explorer and Netscape Navigator) that

allows access to the ESS Specialist

v The ESSNet application for installation and configuration. The ESSNet

workstations includes an HTML page that provides links to all ESS connected to the ESSNet for Specialist access.

The ESSNet provides the following features:

v Support for multiple ESSs. A hub with 16 ports will support 7 ESSs. v Connectivity between your ESS and the ESS Specialist Web interface. The

ESSNet provides browser software at the appropriate level for this connection.

v Improvements in Web performance compared to previous Web browser

connections.

v Faster network connectivity and elimination of network setup problems when

using previous Web connections.

v Ethernet connectivity through an Ethernet hub to the ESSNet. v An independent platform that facilitates installation and configuration of the ESS. v Software for maintenance and configuration.

IBM installs the ESSNet when they install your first IBM Enterprise Storage Server.

Accessing ESS Specialist and ESS Web Copy Services

| | | |

You access the IBM StorWatch Enterprise Storage Server Specialist (ESS Specialist) from the ESSNet. The ESSNet includes browser software for this access. You access ESS Web Copy Services from the ESS Specialist Navigation frame.

Chapter 1. Introduction 5

| | | | |

| |

You can access ESS Specialist from your own workstation if you connect the ESSNet into your intranet by using one of the ports on the ESSNet hub. If you use your own workstation IBM recommends at least 128MB of memory in the workstation. You can access the ESS Specialist by using a browser that is fully enabled for Java(TM) 1.1.x. The ESS Specialist supports the following browsers:

v Netscape Navigator Version 4.04 or greater, which supports Windows NT and

Windows 95.

| | |

| |

Note: Version 4.04 requires Java 1.1 fixpack; later versions such as 4.5 may not

require this fixpack.For better web performance, IBM recommends using Netscape Navigator Version 4.5.1 or greater.

v Microsoft Internet Explorer (MSIE) Version 4.0 or greater, which supports

Windows NT and Windows 95. Note: Version 4.0 requires Service Pack 1.

The ESSNet PC is pre-loaded with current release levels of Microsoft Internet Explorer and Netscape Navigator.

If you do not choose to attach ESSNet into your intranet, you can only access ESS Specialist from a browser on the ESSNet workstation.

You must provide another network connection to the remote ESS through ESSNet hubs for Copy Services support.

IBM updates ESS Specialist and ESS Copy Services through engineering changes (ECs).

ESS Specialist

The ESS includes the ESS Specialist. The ESS Specialist is a Web-based interface that allows you to configure the ESS.

From the Web interface, you can perform the following tasks:

v Monitor error logs v View and change the configuration:

– Add or delete SCSI and fibre-channel host systems – Configure SCSI host ports and fibre-channel host ports on the ESS – Define controller images for System/390 – Define fixed-block (FB) and count-key-data (CKD) disk groups – Add FB and CKD volumes – Assign volumes to be accessible to more than one host system – Change volume assignments

v Change and view communication resource settings, such as electronic mail

(e-mail) addresses and telephone numbers

v Authorize user access With the ESS Specialist, you can view the following information:

v The external connection between a host system and an ESS port v The internal connection of SCSI ports and fibre-channel ports to cluster 1 or

cluster 2

v The allocation of storage space to FB and CKD volumes IBM updates the ESS Specialist through licensed internal code (LIC) updates.

6 ESS Introduction and Planning

ESS Copy Services

ESS Copy Services collects information from your IBM storage servers onto a single Copy Services server. The ESS supports Copy Services through both a Web-based interface and a command-line interface.

This section describes the two interfaces for ESS Copy Services, shows an example of the connections between two Copy Services server groups, and gives you an overview of the functions you can perform using the ESS Web Copy Services panels.

Web-based interface:

The ESS Web Copy Services interface initiates and manages Peer-to-Peer Remote Copy (PPRC) and FlashCopy functions for open systems and IBM System/390 hosts.

You access ESS Web Copy Services from the ESS Specialist Navigation frame.

Command-line interface:

If you choose to install the command-line interface (CLI) application on your host system, you can write customized scripts using CLI commands. You can execute the CLI commands from a host system. You can use the CLI commands to invoke Copy Services tasks in an ESS Web Copy Services server.

The command-line functions (TSO or API) on IBM System/390 hosts initiate and manage Extended Remote Copy (XRC), Concurrent Copy, FlashCopy and PPRC. An API has been developed which uses the TSO command line function. For more information, see

OS/390 DFSMSdfp Advanced Services

The CLI on the open-systems hosts initiates and manages PPRC and FlashCopy on ESS.

IBM Enterprise Storage Server Host Systems Attachment Guide

See

for information about using the Copy Services command-line interface from your open systems hosts to invoke Copy Services functions. See the web site at

http://www.ibm.com/storage/hardsoft/products/ess/refinfo.htm for information on which open systems host platforms are supported for CLI. The

command-line interface (CLI) is updated when a new LIC is provided.

Copy Services server groups:

between two ESS Web Copy Services server groups. A Copy Services server group is a collection of ESS clusters that participate in Copy Services functions that include the volumes within the clusters.

Figure 3 on page 8 shows the connections

Chapter 1. Introduction 7

Site 1 Primary Site

ESS 1

Backup

Server Group 1

ESCON

Site 2 Recovery Site

ESS 4

Primary

H O S T

CLI

ESSnet

ESS 2

Backup

Server Group 2

ESCON

ESS 5

Primary

ESSnet

HUBHUB

CLI

CS000005

Figure 3. Connecting to ESS Web Copy Services server groups

Copy Services panels:

Use the ESS Web Copy Services panels to view and

define:

v Volumes

The volumes panel allows you to view volumes and define them as source or target volumes for PPRC or FlashCopy.

v Storage Server

The Storage Server panel allows you to work with logical servers as complete entities. You can build tasks to place all the volumes of a logical server within a peer-to-peer relationship with all the volumes of another logical server.

You can also build a task to remove similar groups of volumes from an existing peer-to-peer relationship.

You can determine the function of Consistency Groups and freeze and create commands.

v Paths

The Paths panel displays the current status of paths between an ESS and the other ESSs or switches to which it is connected. The paths panel also shows ESCON connected hosts and channel extenders.

You can use the paths panel to add or remove copy services paths or to create consistency group relationships for the LSS pairs.

v Tasks

The Tasks panel allows you to manage tasks you have defined. You can run, remove, save, group, or ungroup tasks. The host system command line interface function uses these predefined tasks.

v Configuration

The Configuration panel allows the customer to view the copy services event and timing logs, set password protection, refresh the panels and mail logs to a specified userid.

H O S T

8 ESS Introduction and Planning

ESS Expert

The IBM StorWatch Enterprise Storage Server Expert (ESS Expert) is an optional software feature of the IBM StorWatch Expert. The StorWatch Expert can be purchased to use with the ESS. The StorWatch Expert Web interface provides storage-resource management for the IBM storage servers.

v Asset management

StorWatch Expert collects and displays asset management data on all of your ESSs.

v Capacity management

StorWatch Expert collects and displays capacity management data on all of your ESSs.

v Performance management

StorWatch Expert collects and displays performance management data on all of your ESSs. For example: – Number of I/O requests – Number of bytes transferred – Read and write response time – Cache usage statistics

The IBM StorWatch Expert allows you to schedule the information collection. With this information, you can make informed decisions about volume placement and capacity planning as well as isolate I/O performance bottlenecks.

Service interface

The ESS provides service interface ports for external connection of a service terminal.

IBM or your service provider can perform service on the ESS by using an IBM mobile service terminal (MoST) or equivalent.

Remote services support

The ESS service interface also provides remote service support with call-home capability for directed maintenance for service personnel.

You provide an analog telephone line to enable this support. The service interface provides an RS232 connection through a modem switch and modem to the analog telephone line.

You need to order a modem and modem switch. The first ESS you order requires this equipment. The modem and modem switch support up to seven ESSs. The cable length from the ESS to the modem switch should be a maximum of 15 m (50 ft.).

The ESS provides the following service functions:

v Continuous self-monitoring initiates a call (call home) to service personnel if a

v Error and problem logs are available that service personnel can access remotely

v Remote support allows the ESS to correct many types of problems. When the

failure has occurred. Because service personnel who respond to the call know about the failing component, the service personnel can reduce the repair time.

to analyze potential failures.

ESS reports a problem, service personnel can often correct the problem from a remote location.

Chapter 1. Introduction 9

Configuration

IBM logically configures your ESS during installation using the work sheets that you completed from the installs the ESS, you can perform additional configuration by using the ESS Web interfaces. You can also change the remote service functions.

Fibre-channel connection

The ESS provides fibre-channel connection to open-systems hosts that it supports. Fibre-channel interconnection architecture provides a variety of communication protocols on the ESS. The units that are interconnected are referred to as Each node has one or more ports.

An ESS is a node in a fibre-channel network. Each port on an ESS fibre-channel host adapter is a fibre-channel port. A host is also a node in a fibre-channel network. Each port attaches to a serial-transmission medium that provides duplex communication with the node at the other end of the medium.

With fibre-channel technology, the distance between an ESS and attached host systems increases from the 25 m (75 ft) maximum imposed by SCSI connections up to 500 m (1500 ft). The ESS can be up to 11 km (6.8 mi) from your host when you connect to it with an IBM SAN fibre-channel switch. The ESS can also be the same distance from your host when you connect to it with an IBM fibre-channel storage hub.

IBM Enterprise Storage Server Configuration Planner

. After IBM

nodes

ESS architecture supports three basic interconnection topologies:

v Point-to-point v Switched fabric v Arbitrated loop

Point-to-point topology

The point-to-point topology, also known as direct connect, allows you to interconnect ports directly. Figure 4 shows an illustration of a point-to-point topology.

Legend

«1¬ is the host system. «2¬ is the ESS.

Figure 4. Point-to-point topology

S008944L

Switched fabric topology

The switched fabric topology provides the underlying structure that allows you to interconnect multiple nodes. You can use a fabric that provides the necessary switching functions to support communication between multiple nodes. You can implement a fabric by using available vendor products that the ESS supports. For a list of these vendor products, see the ESS Web site at:

v www.storage.ibm.com/hardsoft/products/ess/supserver.htm

10 ESS Introduction and Planning

The ESS supports the switched-fabric topology with point-to-point protocol. The ESS fibre-channel adapter should be configured to operate in point-to-point mode when you connect it to point-to-point topologies or fabric topologies. See Figure 5.

S008945N

Legend

«1¬ is the host system. «2¬ is the ESS. «3¬ is a switch.

Figure 5. Switched fabric topology

Arbitrated loop

Fibre-channel arbitrated loop (FC-AL) is a ring topology that allows you to interconnect a set of nodes. The maximum number of ports you can have for a fibre-channel arbitrated loop is 127. See Figure 6 on page 12.

The ESS supports FC-AL as a private loop. It does not support the fabric-switching functions in FC-AL.

Chapter 1. Introduction 11

Legend

«1¬ is the host system. «2¬ is the ESS.

Figure 6. Arbitrated loop topology

Introducing the IBM Subsystem Device Driver

The IBM Subsystem Device Driver resides in the host server with the native disk device driver for the ESS. It uses redundant connections between the host server and disk storage in an ESS to provide enhanced performance and data availability. Figure 7 on page 13 is an example of the type of configuration that IBM Subsystem Device Driver supports. These connections comprise many different components through which data flows during input and output processes. Redundancy and the ability to switch between these components provides many different paths for the data to travel. In the event of failure in one input-output path, it automatically switches to another input-output path. This automatic switching in the event of failure is called

failover

S008943N

12 ESS Introduction and Planning

Host Server

SCSI / FCP

adapter 0

ESS

Figure 7. Multipath connections between a host server and ESS LUNs

Port 0

Cluster 1 Cluster 2

LUN 0 LUN 1 LUN 2 LUN 3

SCSI / FCP

adapter 1

Port 1

S009000Q

The IBM Subsystem Device Driver provides the following functions:

v Enhanced data availability v Automatic path failover and recovery to an alternate path v Dynamic load balancing of multiple paths v Path selection policies for the AIX operating system v Concurrent download of licensed internal code

In most cases, host servers are configured with multiple host adapters with SCSI or fibre-channel connections to an ESS that, in turn, provides internal component redundancy. With dual clusters and multiple host interface adapters, the ESS provides more flexibility in the number of input-output (I/O) paths that are available.

When there is a failure, the IBM Subsystem Device Driver reroutes I/O operations from the failed path to the remaining paths. This function eliminates the following connections as single points of failure: a bus adapter on the host server, an external SCSI cable, a fiber-connection cable, or a host interface adapter on the ESS.

In addition, multipath load balancing of data flow prevents a single path from becoming overloaded with I/O operations.

Dead

The IBM Subsystem Device Driver path recovery algorithms now test

paths

that are not manually offline every 30 minutes.

Concurrent download of licensed internal code

is the capability to download and install licensed internal code on an ESS while applications continue to run. During the time when new licensed internal code is being installed in an ESS, the upper interface adapters inside the ESS may not respond to host I/O requests for approximately 30 seconds. The IBM Subsystem Device Drivers makes this transparent to the host through its path selection and retry algorithms.

Chapter 1. Introduction 13

Note: For updated and additional information not included in this publication, see

the README file on the IBM Subsystem Device Driver compact disk recordable (CDR) or visit the Subsystem Device Driver Web site at:

www.ibm.com/storage/support/techsup/swtechsup.nsf/support/sddupdates/

IBM Enterprise Storage Server availability features

This section describes the following enhanced data availability features that the ESS offers for hosts with UNIX, OS/400, Windows NT, and Windows 2000 operating systems and for System/390 hosts:

v Redundant array of independent disks (RAID) v Predictive failure analysis v Failover protection v Sparing v Fibre-channel support (on supported host systems) v Storage area network (SAN) support v Cache v Nonvolatile storage v Concurrent maintenance v FlashCopy (not supported for OS/400) v Peer-to-Peer Remote Copy (not supported for OS/400) v IBM Subsystem Device Driver

This section also describes data availability features that are available v Open host systems. See “UNIX, Windows NT, and Windows 2000 availability

features” on page 18.

v System/390 hosts. See “System/390 availability features” on page 19. Enhanced data availability for some host systems is also available with the following

software. The software automatically uses a secondary path (from a secondary server) if a failure occurs.

v HACMP, for mirroring, for RS/6000 host systems v Similar software for other non-IBM host systems v System/390 hosts running TPF can use routines that ensure volume redundancy

Redundant array of independent disks implementation

The IBM Enterprise Storage Server protects all storage with redundant arrays of independent disks (RAID). An array is an ordered collection of physical devices (disk drives) that are used to define logical volumes or devices.

The ESS attaches disk drive modules (DDMs) in RAID-5 configurations. The implementation of RAID-5 configurations distributes (stripes) parity across all DDMs in the array. The ESS requires two spare DDMs per loop. With two spares, a loop can have two DDM failures and still allow you to access data.

Implementation of RAID-5 data striping supports independent accesses to the DDMs. The dual-loop device interface card provides the RAID-5 protection on the ESS.

only

for:

All DDMs on a single loop must be of the same capacity.

14 ESS Introduction and Planning

In the event of a DDM failure, the ESS can regenerate data from the other DDMs in the array.

Non-RAID disk group support

The ESS supports non-RAID arrays also. If you format the DDMs as a non-RAID group, then the array is a single DDM.

Predictive failure analysis

The DDMs in the ESS provide state-of-the-art failure analysis techniques that predict errors

The DDM, which is continuously performing predictive failure analysis of device failure conditions, notifies the IBM Enterprise Storage Server of impending hardware failures.

before

Failover protection

The ESS includes the failover protection feature. If one of the clusters fails, the ESS temporarily transfers all ports over to the

remaining cluster so that data access can continue. See “Nonvolatile storage” on page 16 for additional information on cluster redundancy.

Sparing

The sparing function of the ESS is automatically called whenever a DDM failure is detected. The ESS maintains data access during the sparing operation.

they affect data availability.

Note: The first two arrays on a loop include a spare. When the ESS detects a DDM failure in a loop, it automatically uses a spare DDM

to replace the failing DDM. The ESS reconstructs the data on the spare DDM by using redundant information from the remaining DDMs in the array.

If a DDM fails, a loop reconfigures itself into two loops. Once service personnel have replaced the DDM, the loop automatically resumes normal operation as a single loop. Neither the host system nor the operator needs to take any action.

Fibre-channel support

The ESS provides fibre-channel connection when your IBM SSR installs a Fibre-channel adapter card (short wave) in the ESS. See “Fibre-channel connection” on page 10 for a description of fibre-channel topologies that are supported by the ESS.

For more information on host adapters and operating system attachments that the ESS supports on the fibre-channel adapter see the ESS Web site:

http://www.storage.ibm.com/hardsoft/products/ess/supserver.htm

IBM also provides fibre-channel connection through the IBM 2108 SAN Data Gateway, Model G07. You can get the details on fibre-capable server models, adapters, and operating systems on the Web at:

http://www.ibm.com/storage/SANGateway

1. Disk storage on an ESS is available in a package of eight DDMs, which IBM calls an 8-pack.

Chapter 1. Introduction

Cache

The ESS provides fibre-channel connectivity to System/390 host systems with the IBM 9032 Model 005 ESCON director. The 9032 FICON-bridge option provides connection and switching among FICON channels and ESCON controllers.

The ESS provides the following cache features that improve performance:

v 8-GB standard cache and 16-GB optional cache for Models F10 and F20 v 6-GB standard cache for Models E10 and E20 v Fast read from cache

The ESS improves performance by using algorithms to store data in cache tracks that have the greatest probability of access by a read operation.

v Asynchronous write

The ESS provides improved write performance by completing an operation without accessing DDMs.

v Least-recently-used (LRU) replacement

The ESS checks tracks at the top of the cache LRU list for updates in cache that are not on the DDM. The ESS schedules tracks at the top of the nonvolatile storage LRU list for destaging. The ESS can then allocate the tracks without a delay during destaging.

v Internal error recovery

The ESS performs error recovery on DDM-to-cache operations.

Nonvolatile storage

The ESS provides 384 MB of nonvolatile storage (NVS) with all models. Cluster 1 and cluster 2 each have 192 MB of NVS, which enables them to store a second copy of write data. This ensures data integrity in the event of a power failure.

The NVS for cluster 1 is located in cluster 2; cluster 2 NVS is stored in cluster 1. Should a cluster fail, the remaining cluster can access the data from the failed cluster. Battery backup power protects NVS in each cluster.

Concurrent maintenance

The ESS supports concurrent maintenance. Service personnel can replace a failed component, such as a disk drive module (DDM), without shutting down the entire system. Your host system continues to access data while service personnel replace the component in the ESS.

FlashCopy

The FlashCopy feature provides an instant or point-in-time copy of a logical volume. FlashCopy makes it possible for you to access both the source copies and the target copies. This enables applications that use either the source copy or target copy to operate almost without interruption. The source and target volume must both be within the same logical subsystem.

The ESS supports FlashCopy on System/390 hosts and open system hosts (SCSI or fibre channel). FlashCopy is not supported on AS/400 host systems. You can initiate and use FlashCopy from the ESS Web Copy Services interface. See the

IBM Enterprise Storage Server Web Interface User’s Guide

for more information.

If a volume is reserved by host application software it cannot be used as a target volume for FlashCopy.

16 ESS Introduction and Planning

You can also use the command line interface to initiate Copy Services commands from your open host system. See the

Attachment Guide

for more information on the command-line interface.

IBM Enterprise Storage Server Host Systems

A FlashCopy relationship is between CKD volumes or FB LUNs. This relationship exists from the time you initiate a FlashCopy operation:

v Until the ESS copies all data from the source to the target, or v Until you withdraw the FlashCopy relationship

For System/390 hosts, the FlashCopy feature provides instant replication of a full CKD volume.

After a FlashCopy operation, track images on the source volumes and the target volumes are independently available for data read and write operations. You can use FlashCopy to create copies for:

v Disaster recovery v Business intelligence applications v Use in a test environment v Instant checkpoints

Note: For System/390 hosts you can use TSO to invoke these functions for MVS While your critical applications continue using the source volume, you can define

and initiate a FlashCopy from the ESS Specialist Web interface. Once you have defined and initiated the target volume, it is available to you for tasks such as asynchronous backup.

™

See “FlashCopy and PPRC restrictions for open system hosts” on page 18 for additional information about FlashCopy.

Peer-to-Peer Remote Copy

The Peer-to-Peer Remote Copy (PPRC) feature allows synchronous copying of a physical volume (the source) on one storage server to another volume (the target) on a second storage server. PPRC ensures write operations on both local and remote copies. The ESS supports PPRC on System/390 hosts and open system hosts (SCSI or fibre channel). PPRC is not supported on AS/400 host systems.

Note: A PPRC target cannot be accessed until the PPRC relationship is ended,

that is the target volume is no longer part of a PPRC pair.

If a volume is reserved by host application software it cannot be used as a secondary volume for PPRC.

You need to connect the ESSNet to both the primary and recovery sites through your LAN to initiate PPRC operations for SCSI and fibre-channel attached hosts.

v The primary storage server (application site) establishes the paths and links to a

secondary storage server (recovery site). The primary storage server also manages the synchronous copying of the volume from the primary site to the secondary site. The remote secondary server can be up to 103 km from the primary server.

v From the primary host, the I/O operation to the secondary storage server is

transparent.

Chapter 1. Introduction 17

The PPRC feature requires that you install ESCON adapters on the ESS. The ESCON adapter provides the link between a primary and a secondary server. More than one ESCON link increases the reliability and availability of the PPRC feature.

You can use the ESS Web Copy Services interface to:

v Initiate and terminate the functions v Suspend a copy operation v Query the status of volumes v Perform predefined tasks

Also, with PPRC, a recovery host has the ability to recover control of the secondary volume.

For System/390 hosts you can use TSO to invoke these functions for MVS. For the procedures for using TSO for PPRC functions, see

Guide and Reference

For open system hosts you can use the ESS Web Copy Services command-line interface to invoke these functions. For more information on the command-line interface see the

See “FlashCopy and PPRC restrictions for open system hosts” for additional information about PPRC.

IBM Enterprise Storage Server Host Systems Attachment Guide

DFSMS/MVS V1 Remote Copy

FlashCopy and PPRC restrictions for open system hosts

When you copy a source volume to a target volume with FlashCopy or PPRC, and you require concurrent read/write access of both volumes, the source and target volumes should be on different host systems. A copy operation with the source and target volume on the same host system creates a target volume with the same identification as the source volume. The host system sees two identical volumes.

When the copy process creates the same identification for the target volume as for the source volume the user cannot distinguish one from the other, so the user may not be able to access the original data.

Note: For some operating systems, such as Novell NetWare, the user is unable to

access either the source or target volume. Although both data sets are intact, they are invisible to the user.

The target volume and the source volume can be on the same host system for a PPRC or FlashCopy operation only under the following conditions:

v For AIX: when the host system is using a Logical Volume Manager (LVM) with

recreatevg command support

v For AIX, SUN, and HP: when the host system is not using an LVM v For any host system: when the host system can distinguish between a source

and a target volume that have the same identification

UNIX, Windows NT, and Windows 2000 availability features

This section describes UNIX, Windows NT, and Windows 2000 availability features, which include:

v Data sharing v IBM Subsystem Device Driver

18 ESS Introduction and Planning

Data sharing

You can use the ESS to share data among multiple UNIX-based homogeneous host systems and host systems with Windows NT and Windows 2000. Use the correct application code or database manager to regulate concurrent read or write access.

For example: v You could assign an 8-GB disk partition (logical volume) to multiple separate

UNIX-based host systems. If host systems are using software that can regulate access to data, then one

host system could write data while a second host system initiates a query.

v Two IBM RS/6000 host systems with the Oracle Parallel Edition could also share

a single copy of data. Oracle also runs with other UNIX operating systems.

Application software or database manager software is responsible for the integrity of the database. This includes access management and access locking. The ESS provides the physical access to the data. Sharing of data is now possible without transferring files, creating second copies of data, or other methods that you may have used previously.

IBM Subsystem Device Driver

You can install the IBM Subsystem Device Driver in your open host system to improve data availability and performance. The IBM Subsystem Device Driver uses redundant connections between the host server and disk storage in an ESS. These connections comprise many different components through which data flows during input and output processes.

Redundancy and the ability to switch between these components provides many different paths on which the data travels. See

Version 1 Release 1

for more information.

System/390 availability features

This section describes the following availability features and other System/390 functions:

v Extended remote copy v Using Extended Remote Copy for outages v Concurrent Copy v Multiple allegiance v Parallel Access Volumes

For more detailed descriptions of extended remote copy and concurrent copy and procedures about how to use them, see

Extended Remote Copy

The ESS supports the Extended Remote Copy (XRC) feature on System/390 hosts. XRC mirrors data on the ESS to a remote location for disaster recovery. It ensures data consistency across all volumes that you have defined for mirroring. The volumes can reside on several different ESSs. XRC can mirror the volumes over several thousand kilometers from the primary site to the recovery site.

IBM Subsystem Device Driver,

IBM Advanced Copy Services

Using Extended Remote Copy for outages

With ESS XRC you can suspend or resume service during an outage. You do not have to terminate your current data-copy session. You can suspend it and restart it.

Chapter 1. Introduction 19

Only data that has changed during the outage needs to be resynchronized between the copies, a simple operation that greatly reduces resynchronization time.

Note: The ESS supports this function on System/390 MVS operating systems only. If you need to change the default setting for an outage, you can do so through the

ESS Copy Services Web interface. The Copy Services servers must be identified and set up by IBM service personnel prior to your using the ESS Copy Services Web interface.

See the procedures for changing the XRC time-out from the ESS Copy Services Web interface.

IBM Enterprise Storage Server Web Interface User’s Guide

for the

Concurrent Copy

The ESS supports the Concurrent Copy feature on System/390 hosts. Concurrent Copy, like FlashCopy, creates point-in-time copies of volumes. However, Concurrent Copy can also copy data sets from a source volume. It can copy the data to tape, an optical library or to another DASD device. Data systems like the IBM DB2 product, can also initiate Concurrent Copy.

Multiple allegiance

The Multiple Allegiance feature allows the ESS to accept an input/output (I/O) request from each channel path group for a unit address. The request can be concurrent with other I/O requests. The ESS queues requests and then initiates them. This allows you to have multiple access to a shared volume (logical device) without affecting performance.

Using the Multiple Allegiance feature can improve ESS throughput and performance.

Parallel Access Volume

The Parallel Access Volume (PAV) feature allows you to access a CKD volume on an ESS in parallel. With PAV, you assign a base address to a CKD logical device. You can use any of the 256 available addresses as the base device address. You then configure alias addresses for the CKD logical device.

You can then dynamically reassign any configured alias address from one CKD logical device to another CKD logical device. Address types are:

v Base address

The base address is the unique unit address of a volume. The ESS associates storage space with this address.

v Alias address

You can assign several alias addresses to the base address. The ESS runs I/O operations to the alias address against the base address.

With PAV, a single System/390 can simultaneously process multiple I/O operations to the same logical volume. This can reduce volume contention.

See the PAV.

IBM Enterprise Storage Server User’s Guide

Descriptions and comparisons of the IBM Enterprise Storage Server models

This section describes the ESS models and features.

20 ESS Introduction and Planning

for more information on using

Power differences between models

Table 1 shows the power differences between the ESS models.

Table 1. Power differences between ESS models

Attribute Models E10 and F10 Models E20 and F20

Dual power cords Yes Yes Power Single phase (50/60 A) Three phase (50/60 A) DDM support 16 - 64 16 - 128

Features

Table 2 compares the ESS features that are available for hosts that have small computer system interface (SCSI) interfaces with hosts that have Enterprise Systems Connection (ESCON) interfaces.

Table 2. IBM Enterprise Storage Server feature comparison

Feature Host Systems with SCSI or

Fibre-Channel Interfaces

Attachment Parallel attachment, SCSI

v 1 - 15 targets per bus v 1 - 64 logical units per target

128 fibre-channel attached hosts per fibre port (see “Fibre-channel host adapters” on page 30 for information on loop topology)

Host systems supported

Control unit emulation No

Host adapters,2-16(See Note 1.)

Software device drivers

v IBM AS/400 v IBM RS/6000 and RS/6000 SP v HP 9000 v Sun v Compaq AlphaServer v Data General v IBM Netfinity and Intel-based PCs v IBM NUMA-Q

v Ultra-SCSI, dual port (for attaching

host systems with SCSI-2 or SCSI-3 adapters)

v Fibre channel, single port (for

attaching host systems with fibre-channel adapters)

v AS/400 hosts

– 9337 Models 580, 590

v UNIX , Window NT and Windows

2000 hosts – Models E10, E20, F10, and F20

Host Systems with ESCON Interfaces

ESCON attachment

v 1 - 16 controller images v 1 - 256 devices per control unit

image

v IBM ES/9000 v IBM 3090 v IBM S/390 Models 7060, 9672, and

2003

v 3990 Model 3, Model 3 transaction

processing facility (TPF), and Model 6

v Models E10, F10, E20, and F20 ESCON

MVS, VM, VSE, TPF

Chapter 1. Introduction 21

Table 2. IBM Enterprise Storage Server feature comparison (continued)

Feature Host Systems with SCSI or

Fibre-Channel Interfaces

Disk drive module (DDM) format Fixed block address (FBA) Count key data (CKD) Peer-to-Peer remote copy (PPRC)

(See Notes 2 and 3.) Concurrent Copy No Yes Extended Remote Copy (XRC) No Yes XRC planned outage No Yes (MVS operating systems) FlashCopy (See Note 3.) Yes Yes IBM Subsystem Device Driver (see

Note 1 below) Multi-path locking facility (MPLF) No Yes Multiple allegiance No Yes Parallel-access volume No Yes Notes:

1. See the ESS web site at www.ibm.com/storage/hardsoft/products/ess/refinfo.htm for details about host-system adapters supported with the ESS. See the following web site for details

2. This feature requires that you install an ESCON adapter on both the primary ESS and the secondary ESS.

3. The ESS does not support PPRC or FlashCopy on the AS/400.

Yes Yes

Yes No

Host Systems with ESCON Interfaces

Table 3 lists the physical features for the ESS.

Table 3. IBM Enterprise Storage Server physical features

Feature Description

Continuous availability, designed to virtually eliminate single points of failure or repair (See Note 1.)

Dual-cluster configuration

SSA device adapters Eight serial storage adapter loops (maximum) Spare DDM (See Note 2.)

Read/write functions

v Cluster-processor complex failover v Device adapter failover v Concurrent maintenance v Failover/failback

v Eight cluster processors v Cache: 6 GB for Models E10 and E20, 8 GB standard

and optional 16 GB for Models F10 and F20

v NVS: 384 MB

v RAID 5 (6+P+S, 7+P) v RAID reconstruction with spare DDM

v Read/write cache v Fast-write NVS in storage server v Maximum sequential bandwidth

– 180 MB/second read – 140 MB/second write

22 ESS Introduction and Planning

Table 3. IBM Enterprise Storage Server physical features (continued)

Feature Description

Service

Customer interface

DDMs (See Note 2.)

Support of 8-packs

Expansion enclosure Supported by Models E20 and F20 Notes:

1. The ESS requires two spares per SSA loop with RAID. For enhanced availability, IBM recommends that you install the IBM Subsystem Device Driver on your open host system.

2. DDM configuration: a. DDMs are either all 9.1 GB, all 18.2 GB, or all 36.4 GB. b. DDM capacity assumes a RAID-5 configuration.

v Mobile solutions terminal or equivalent v Remote service v Call home v Concurrent maintenance v Simple Network Management Protocol (SNMP)

v Storage server Ethernet attachment (10Base-T) v Customer workstation v Web interface

v 16 - 384 in increments of 8 (8-pack) v Capacity

– 105 GB to 2.8 TB (9.1 GB DDMs) – 210 GB to 5.6 TB (18.2 GB DDMs) – 420 GB to 11.2 TB (36.4 GB DDMs)

v 36.4 GB (40 MBps) v 18.2 GB (40 MBps) v 9.1 GB (40 MBps)

Logical subsystems

IBM configures the ESS as logical containers that are known as logical subsystems (LSSs). The limit is 16 LSSs each for count-key-data (CKD) and fixed block (FB) format.

Note: If you reduce the CKD LSS limit to zero, then no Peer-to-peer copy functions

IBM advises that you consider reducing the maximum LSSs limit (to eight or zero) if you do not intend to create more than eight LSSs. Also reduce the maximum LSS limit if you plan to create only CKD or FB data on your ESS. Reducing the maximum LSS limit reduces the cache space that the ESS uses to maintain the LSS structures (performance tuning).

Note: If you increase or decrease the LSS at a future date, you will need to

will execute. CKD LSS limit must be no lower then eight to support peer-to-peer copy functions for Open only machines.

reinitialize the ESS in order for the change to take effect.

Chapter 1. Introduction 23

24 ESS Introduction and Planning

Chapter 2. Planning the physical configuration

This chapter lists the feature codes for the required and optional features for the ESS, and gives planning information for the features. Use the feature codes to order the following software components and hardware components:

v United States-government orders v Power v Adapter cards v Memory capacity

United States-government orders

v Physical configuration feature codes and options v Connection hardware v Language for the operator panel v Requirements for attaching 7133 drawers v ESS Network (ESSNet) installation requirements v Physical configuration changes v Licensed internal code and optional software

See “Physical configuration options” on page 32 for a list of the physical configuration options you may select.

Power features

Power outlets

For United States-government orders, select feature code 0983. This feature code ensures that IBM manufactures the ESS in the United States of America.

This section includes information on requirements and feature codes for:

v Power outlets v Power supply input voltage v Power cables v Remote power-control logic card v Remote support (modem and modem switch) v Extension cords

You need to supply the following power outlets for the ESS installation: v High-voltage outlets:

– Two power outlets for the two ESS power cables

IBM recommends separate power sources for these outlets. This maximizes availability by eliminating a single point of failure.

– Two power outlets for the two power cables for the expansion enclosure

v Regular-voltage outlets:

– Three power outlets for the ESSNet power cables (one for the workstation,

one for the display, and one for the hub). IBM provides the power cables for the ESSNet

– One power outlet for the service terminal

This outlet needs to be within2m(6ft.) of the ESS.

– Two power outlets for remote support (one for the modem and one for the

switch)

IBM cannot install the ESS if your site does not meet these power requirements.

Uninterruptible power system

If you have an uninterruptible power supply (UPS) that prevents power interruptions, have IBM connect the UPS to each ESS enclosure. Connect the UPS to the ESS enclosures through mainline power cable 1. The ESS maintains the charge of the main batteries through this mainline power cable.

Power supply input voltage

You need to specify one of the following feature codes for input voltage when you order your ESS:

9870 Voltage, 200 - 240 V, 50 - 60 Hz (USA) 9871 Voltage, 380 - 480 V, 50 - 60 Hz

Power cables

The following feature codes determine the type of power cable you receive with the ESS Models. The ESS requires two power cables. The expansion enclosure also requires two power cables. When you order an expansion enclosure, IBM includes the correct power cables. IBM also provides the power cables for the ESSNet.

For Models E10 and F10, order the following feature codes:

9801 Single Phase, 50, 60 Hz, 50 A (United States (U.S.), Canada,

9802 Single Phase, 50 Hz, 50 A (Europe, Middle East, Africa (EMEA)) 9803 Single Phase, 50, 60 Hz, 60 A (Japan) 9986 Single Phase, 50, 60 Hz, 50 A (Chicago)

For Models E20 and F20, order the following feature codes:

9851 Three phase, 50, 60 Hz, 50 A for the U.S., Canada, LA, and AP 9852 Three phase, 50 Hz for EMEA 9853 Three phase, 60 Hz, 60 A for Japan and U.S. 9854 Three phase, 50, 60 Hz, 60 A for U.S., Canada, LA, and AP 9987 Three phase, 50, 60 Hz, 50 A for Chicago (U.S.) 9988 Three phase, 50, 60 Hz, 60 A for Chicago (U.S.)

Remote support features

This section includes feature codes for remote support. This includes:

v Remote power control v Remote support function v Remote support function attachment

Latin America (LA), and Asia Pacific (AP)

Remote power control

This optional feature is for the logic card that supports remote power control within the ESS:

26 ESS Introduction and Planning

1001 Remote power control

Remote support switch

Each ESS requires a modem for remote service access. When you attach the remote-support switch to a modem, you can interconnect up to seven ESSs. For remote support, you must order either feature code 2715 or feature code 2716:

2715 Remote-support function

This feature provides:

v Remote-support switch and cables v Modem v ESSNet workstation (a personal computer) v Monitor v Three Ethernet cables, each 17 m (50 ft.) in length v Ethernet Hub v Power cables for the PC, hub, and monitor v Hypertext Markup Language (HTML) file for the ESSNet

2716 Remote-support function - additional attachment

This feature provides a pair of cables for attaching an ESS to the remote-support switch. This feature also includes two ESSNet Ethernet cables, each 17 m (50 ft.) in length.

See “Power cables for the remote-support switch by modem country” for information about power cables.

Power cables for the remote-support switch by modem country

Select the power cable for the remote-support switch for your modem country-group:

9301 Modem country-group M01

Brazil, Canada, Mexico, U.S.

|| |

9302 Modem country-group M02

Croatia, Czech Republic, Hungary, Jordan, Kazakhstan, Romania, Russia, Slovakia, Ukraine

9303 Modem country-group M03

Germany

9304 Modem country-group M04

Israel

9305 Modem country-group M05

France, Italy, Portugal

9306 Modem country-group M06

Japan

9307 Modem country-group M07

9308 Modem country-group M08

Belgium, Netherlands

New Zealand

Chapter 2. Planning the physical configuration 27

9309 Modem country-group M09

Denmark, Iceland, Norway, Poland, Sweden

9310 Modem country-group M10

Mozambique, Nigeria, South Africa

9311 Modem country-group M11

Cyprus, Great Britain (UK), Oman, United Arab Emirates (UAE)

9312 Modem country-group M12

Colombia, Costa Rica, Ecuador, Peru, Republic of China, Venezuela, Uruguay

9313 Modem country-group M13

Argentina, Chile, Egypt, Greece, India, Indonesia, Korea, Lebanon, Philippines, Saudi Arabia, Spain, Thailand, Turkey

9314 Modem country-group M14

Austria

9315 Modem country-group M15

Switzerland

9316 Modem country-group M16

Extension cords

Finland

9317 Modem country-group M17

Australia

9318 Modem country-group M18

Peoples Republic of China, Hong Kong, Malaysia, Singapore

Each ESS requires an extension cord for use by service personnel. (These cords are also known as convenience cords.) Specify one of the following feature codes to order the type of extension cord you require at your site:

9401 Extension cord country-group C01

Brazil, U.S., Canada

9402 Extension cord country-group C02

Aruba, Bahamas, Barbados, Bermuda, Bolivia, Cayman Islands, Columbia, Costa Rica, Curacao, Dominican Republic, El Salvador, Ecuador, Guatemala, Guyana, Haiti, Honduras, Jamaica, Japan, Liberia, Mexico, Netherlands Antilles, Nicaragua, Panama, Philippines, Peoples Republic of China, Saudi Arabia, Surinam, Trinidad Tobago, Venezuela

9403 Extension cord country-group C03

9404 Extension cord country-group C04

9405 Extension cord country-group C05

28 ESS Introduction and Planning

Peru, Thailand

Israel

Chile, Ethiopia, Italy, Libya, Somalia

9406 Extension cord country-group C06

Afghanistan, Algeria, Andorra, Angola, Austria, Belgium, Benin, Bosnia Herzegovina, Bulgaria, Burundi, Cameroon, Central African Republic, Chad, Congo Brazzaville, Croatia, Czech Republic, Egypt, Finland, France, French Guiana, Germany, Greece, Guinea, Hungary, Iceland, Indonesia, Iran, Ivory Coast, Jordan, Kenya, Korea, Lebanon, Luxemburg, Macau, Malagasy, Mali, Martinique, Mauritania, Mauritius, Monaco, Morocco, Mozambique, Netherlands, New Caledonia, Niger, Norway, Poland, Portugal, Romania, Senegal, Slovakia, Slovenia, Spain, Sudan, Sweden, Syria, Togo, Tunisia, Turkey, Upper Volta, Russia, Vietnam, Yugoslavia, Zaire, Zimbabwe

9407 Extension cord country-group C07

Denmark

9408 Extension cord country-group C08

Argentina, Paraguay, Uruguay

9409 Extension cord country-group C09

Liechtenstein, Switzerland

9410 Extension cord country-group C10

9411 Extension cord country-group C11

9412 Extension cord country-group C12

Adapter features

This section includes the feature codes and information for:

v Small computer system interface (SCSI) host adapters v Fibre-channel host adapters and attachment v Enterprise Systems Connection (ESCON) host adapters v Device adapters

Also see the ESS Web site for details about the host system adapters that the ESS supports:

Australia, Peoples Republic of China, New Zealand, Papua New Guinea, Western Samoa

Bangladesh, Burma, Pakistan, South Africa, Sri Lanka

Antigua, Bahrain, Brunei, Channel Islands, Cyprus, Fiji, Ghana, Hong Kong, India, Iraq, Ireland, Kuwait, Malawi, Malaysia, Malta, Nepal, Nigeria, Oman, Polynesia, Qatar, Sierra Leone, Singapore, Tanzania, United Arab Emirates, Uganda, United Kingdom, Yemen, Zambia

www.storage.ibm.com/hardsoft/products/ess/supserver.htm The ESS has four host adapter bays. Each bay supports up to four host adapters.

Each ESS supports 32 SCSI ports, 16 fibre-channel ports, or 32 ESCON channel ports or any combination of SCSI, fibre-channel, and ESCON connections. The ESS supports up to a total of 32 physical ports (16 host system adapters).

Chapter 2. Planning the physical configuration 29

SCSI host adapters

The ESS provides an ultra-SCSI interface with SCSI-3 protocol for attachment to host systems with UNIX, Windows NT, Windows 2000, and the OS/400 operating systems. The interface also supports SCSI-2 protocol.

The ESS supports up to 32 ports; two per SCSI host adapter. Each port supports an ultra-SCSI or SCSI-2 fast and wide differential-connection to the host system. A SCSI-2 fast and wide differential connection is a subset of ultra-SCSI.

3002 SCSI host adapter (optional1-16) Order host cables separately (see “Connection hardware” on page 37).

Fibre-channel host adapters

The ESS supports the point-to-point topology, the switched fabric topology and the fibre channel arbitrated loop topology, private loop profile. When using the loop topology, the ESS has no restrictions on the number of hosts or devices that you can attach on a loop, other than the architectural limit of 127. However, the loop goes through a loop initialization process (LIP) whenever you add or remove a host or device from the loop. LIP disrupts any I/O operations currently in progress. For this reason, IBM recommends that you only have a single host and a single ESS on any loop (point-to-point loop).

To have IBM install short-wave fibre-channel adapters on your ESS, order FC 3022 (IBM P/N 54G3384). This feature code includes a 31 m (93 ft), 50 µM short-wave optics cable. These fibre-channel adapters incorporate short-wave laser transmitters. You can order and have IBM install a maximum of 16 fibre-channel adapters on the ESS. Each adapter has a single host port. See your IBM field office about longer cables or 62.5 µM cable.

3022 Fibre-Channel Short Wave host adapter (optional 2-16)

ESCON host-adapters

Each ESCON host adapter provides two ESCON channel interfaces for attachment to up to 32 channels. Each ESCON channel supports 64 logical paths, for a total of 2048 paths.

3011 ESCON host adapter (optional 2, 4, 6, 8, 10, 12, 14, and 16) Order host cables separately (see “Connection hardware” on page 37).

Device adapters

The standard configuration for the ESS includes eight device (DDM) adapters. Each device adapter provides two device loops (4 interfaces) that operate at up to

160 MB per second, depending on the DDM type that you attach. Each loop supports up to 48 DDMs.

Because the device loops are between adapter pairs, both clusters 1 and 2 can access all DDMs on a loop. See “Failover protection” on page 15 for the advantages to this configuration.

Complimentary 31m, 50 micron host cable included.

30 ESS Introduction and Planning

Reserved loops

IBM supports reuse of 7133 Models 020 and D40 drawers in a 2105 Model 100 expansion enclosure in an IBM Enterprise Storage Server configuration. Support includes 7133 drawers in new 2105 Model 100 expansion enclosures. This support provides investment protection for up to 12 of your existing IBM 7133 serial disk drawers.

IBM service personnel add the Model 100 to the loops you reserved with feature code 9904. FC 9904 reserves two loops; the limit is four reserved loops. A loop refers to the wiring that is needed to address the storage. Figure 8 shows reserved loops.

Pair 1

Pair 2

Pair 3

Pair 4

Figure 8. Reserved loops

| |

See “Feature codes and requirements for attaching 7133 drawers” on page 36 for the needed requirements in order to attach Model 100 expansion racks.

Memory capacity features

The ESS Models E10 and E20 have the following memory capacity:

v Standard 6 GB of cache, 3 per cluster v 384 MB (192 MB per cluster) of nonvolatile storage (NVS)

Loop A 8-Pack

Loop B 8-Pack

Loop A 8-Pack

Loop B 8-Pack

Loop A 8-Pack

Loop B 8-Pack

Loop A 8-Pack

Loop B 8-Pack

Loop A 8-Pack

Loop B Reserved by FC9904

Loop A 8-Pack

Loop B Reserved by FC9904

Loop A 8-Pack

Pair 1

Pair 2

Pair 3

Pair 4

S008708

The ESS Models F10 and F20 have the following memory capacity:

| |

v Standard 8 GB of cache, 4 per cluster with FC 4002. IBM delivers FC 4002 on

the ESS unless you specify the following option: – 16 GB of cache, FC 4004

v 384 MB (192 MB per cluster) of nonvolatile storage (NVS)

Physical configuration features and options

This section includes the feature codes for:

v DDM cages and 8-packs v physical configuration options v Storage on demand

Chapter 2. Planning the physical configuration 31

DDM cages and 8 packs

The Models E10 and F10 support one DDM cage. Models E20 and F20 support two DDM cages.

Each DDM cage supports eight 8-packs (64 DDMs), four in the front, and four in the rear. IBM will ship the appropriate number of cages, based on the number of 8-packs you order.

The feature numbers for ordering 8-packs in different DDM sizes for the ESS cages are:

2121 DDM 8-pack (9.1 GB) 2122 DDM 8-pack (18.2 GB) 2123 DDM 8-pack (36.4 GB)

IBM includes device cables for the 8-packs that IBM installs in the factory. You must order device cables for the 8-packs that you have service personnel install in the field.

Expansion enclosures

The expansion enclosures (feature code 2100) support one, two, three, or four DDM cages.

Each DDM cage supports eight 8-packs (64 DDMs), four in the front, and four in the rear.

Note: The Model E10 does not support the expansion enclosure.

Populating the IBM Enterprise Storage Server

You can build the maximum configuration for an ESS with the expansion enclosures.

If you order the expansion enclosure from the factory, IBM populates the expansion enclosure with 8-packs in the following order:

v Models E10 and F10

– Cage 1, 8-packs 4, 3, 2, 1 – Cage 1, 8-packs 8, 7, 6, 5

v Models E20 and F20

– Cage 1, 8-packs 4, 3, 2, 1 – Cage 1, 8-packs 8, 7, 6, 5 – Cage 2, 8-packs 4, 3, 2, 1 – Cage 2, 8-packs 8, 7, 6, 5

Physical configuration options

You can order the following physical configurations for your ESS:

v Ultra-high-performance configuration with arrays that include only 9.1-GB DDMs v High-performance configuration with arrays that include only 18.2-GB DDMs v Capacity configurations with arrays that include only 36.4-GB DDMs

Standard configuration provides: v 6 GB of cache for Models E10 and E20

32 ESS Introduction and Planning

v 8 GB of cache for Models F10 and F20. Also see “Cache” on page 16 for an

optional cache increase.

v 384 MB of nonvolatile storage (NVS) v Eight SSA device adapter cards v DDMs assigned to optimum serial loops v Storage that is allocated as RAID or non-RAID

Note: AS/400 storage must be RAID.

v System/390 and zSeries storage defined as either 3380 or 3390 track format v Emulated LUNs defined for the UNIX, OS/400, Windows NT, and Windows 2000

operating systems

Ultra-high-performance configurations

You can order the ultra-high-performance configuration in two capacities for Models E10, E20, F10, and F20. This configuration supports only arrays with 9.1-GB DDMs.

Table 4. Ultra-high-performance configuration

Feature Code Capacity Description Models

9601 420 GB 8 eight-packs E10, F10, E20, and F20 9602 840 GB 16 eight-packs E20 and F20

High-performance configurations

The high-performance configurations in Table 5 support only arrays with 18.2-GB DDMs.

Table 5. High-performance configurations

Feature Code Capacity Description Models

9621 420 GB 4 eight-packs E10, F10, E20, and F20 9622 630 GB 6 eight-packs E10, F10, E20, and F20 9623 840 GB 8 eight-packs E10, F10, E20, and F20 9630 1050 GB 10 eight-packs E20 and F20 9624 1260 GB 12 eight-packs E20 and F20 9631 1470 GB 14 eight-packs E20 and F20 9625 1680 GB 16 eight-packs E20 and F20 9632 2170 GB 20 eight-packs, and

expansion enclosure

9626 2660 GB 24 eight-packs, and

expansion enclosure

9633 3150 GB 28 eight-packs, and

expansion enclosure

9627 3640 GB 32 eight-packs, and

expansion enclosure

9634 4130 GB 36 eight-packs, and

expansion enclosure

9628 4620 GB 40 eight-packs, and

expansion enclosure

9635 5110 GB 44 eight-packs, and

expansion enclosure

E20 and F20

Chapter 2. Planning the physical configuration 33

Table 5. High-performance configurations (continued)

Feature Code Capacity Description Models

9629 5600 GB 48 eight-packs, expansion

enclosure

E20 and F20

Capacity configuration

The capacity configuration supports only arrays with 36.4-GB DDMs.

Table 6. Capacity configurations

Feature Code Capacity Description Models

9646 840 GB 4 eight-packs E10, F10, E20, and F20 9647 1260 GB 6 eight-packs E10, F10, E20, and F20 9641 1680 GB 8 eight-packs E10, F10, E20, and F20 9650 2100 GB 10 eight-packs E20 and F20 9642 2520 GB 12 eight-packs E20 and F20 9651 2940 GB 14 eight-packs E20 and F20 9643 3360 GB 16 eight-packs E20 and F20 9652 4340 GB 20 eight-packs, and

expansion enclosure

9648 5320 GB 24 eight-packs, and

expansion enclosure

9653 6300 GB 28 eight-packs, and

expansion enclosure

9644 7280 GB 32 eight-packs, and

expansion enclosure

9654 8260 GB 36 eight-packs, and

expansion enclosure

9649 9240 GB 40 eight-packs, and

expansion enclosure

9655 10 220 GB 44 eight-packs, and

expansion enclosure

9645 11 200 GB 48 eight-packs, and

expansion enclosure

E20 and F20

ESS storage on demand

| |

| | | |

| |

IBM offers a storage–on-demand feature called step-ahead storage. With the step-ahead feature you can purchase an ESS Model F20 with extra storage (18.2 or 36.4 GB drives) and use the extra storage when you need it.

This option is particularly useful when you have dynamic or unpredictable growth, or if you just want the assurance that the storage will be there when you need it. You may activate the stand-by capacity without interruption to your work. IBM requires payment for the on-demand capacity upon your activation of the storage.

To get storage on-demand you must: v Place a new order of an ESS Model F20. The order includes ESS standard

configuration plus step ahead feature codes.

34 ESS Introduction and Planning

| |

| | |

| |

Note: You are billed for the standard configuration that you ordered plus a

carrying fee for the step-ahead storage.

v Sign a contract with IBM wherein you agree to purchase the step-ahead storage

when you configure it for use. The purchase must be no later than one year after you activate the storage.

v Enable the ESS call-home function, and leave it enabled to allow IBM to monitor

your activation of the step-ahead storage.

v The Call Home heartbeat interval must not be set to 0.

Feature codes for step-ahead storage

Use the following feature codes to order the ESS Model F20 with step ahead storage. The step-ahead carrying fee is included in the price of these step-ahead configuration features:

FC 2132

Eight pack with 18.2 GB DDM

FC 2133

Eight pack with 36.4 GBDDM

Table 7. High-performance Configurations with 18.2 GB DDMs

Capacity Increments (GB)

420 210 630 No 9521 (4) 2122, (2)

630 210 840 No 9522 (6) 2122, (2)

840 210 1050 No 9523 (8) 2122, (2)

1050 210 1260 No 9530 (10) 2122, (2)

1260 210 1470 No 9524 (12) 2122, (2)

1470 210 1680 No 9531 (14) 2122, (2)

1680 490 2170 Yes 9525 (16) 2122, (4)

2170 490 2660 Yes 9532 (20) 2122, (4)

2660 490 3150 Yes 9526 (24) 2122, (4)

3150 490 3640 Yes 9533 (28) 2122, (4)

3640 490 4130 Yes 9527 (32) 2122, (4)

4130 490 4620 Yes 9534 (36) 2122, (4)

4620 490 5110 Yes 9528 (40) 2122, (4)

5110 490 5600 Yes 9535 (44) 2122, (4)

Step ahead Capacity Increments (GB)

Total Capacity (GB)

Expansion Enclosure (FC 2100)

Feature Code

Number of Eight Pack Feature Codes

2132

Chapter 2. Planning the physical configuration 35

Table 8. Capacity Configurations with 36.4 GB DDMs

Capacity Increments (GB)

840 420 1260 No 9546 (4) 2123, (2)

1260 420 1680 No 9547 (6) 2123, (2)

1680 420 2100 No 9541 (8) 2123, (2)

2100 420 2520 No 9550 (10) 2123, (2)

2520 420 2940 No 9542 (12) 2123, (2)

2940 420 3360 No 9551 (14) 2123, (2)

3360 980 4340 Yes 9543 (16) 2123, (4)

4340 980 5320 Yes 9552 (20) 2123, (4)

5320 980 6300 Yes 9548 (24) 2123, (4)

6300 980 7280 Yes 9553 (28) 2123, (4)

7280 980 8260 Yes 9544 (32) 2123, (4)

8260 980 9240 Yes 9554 (36) 2123, (4)

9240 980 10,220 Yes 9549 (40) 2123, (4)

10,220 980 11,200 Yes 9555 (44) 2123, (4)

Step ahead Capacity Increments (GB)

Total Capacity (GB)

Expansion Enclosure (FC 2100)

Feature Code

Number of Eight Pack Feature Codes

2133

2132

2133

Feature codes and requirements for attaching 7133 drawers

For protection of your assets, IBM supports attachment of your existing 7133 drawers to an ESS in a new 2105 Model 100 expansion enclosure. Use:

v FC 1121 to attach the first new Model 100 expansion enclosure v FC 1122 to attach a second new Model 100 expansion enclosure, as a follow-on

to FC 1121

These feature codes have the following requirements: v The LIC in the ESS to which you are attaching the 2105 model 100 expansion

enclosure must support attachment of 7133 drawers.

v The 2105 Model 100 installation must meet the floor loading and service

clearance requirements as specified in “Service clearance and floor-loading requirements for the ESS” on page 55.

36 ESS Introduction and Planning

v You must fill out custom configuration work sheets, using a modified version of a

Define Disk Groups work sheet that closely matches the storage capacity being installed with the Model 100 expansion enclosures and 7133 drawers. The 7133 drawer will be configured as 2 disk groups. The disk groups can be either RAID 5 arrays or non RAID disks. Logical configuration of the 7133 drawers is only supported via ESS Specialist. See the

Configuration Planner

v You cannot attach the Model 100 to an ESS model that already has an ESS

expansion enclosure (FC 2100).

v You reserved the necessary device loops in the ESS with FC 9904

With two FC 9904 (four reserve loops), you can attach up to a maximum of twelve 7133 Model 020 or Model D40 drawers. With one FC 9904 (two reserve loops), you can attach up to the maximum of six 7133 Model 020 or Model D40 drawers.

v The 7133 drawers can only be installed in a new Model 100 (FC 1121 and FC

1122). The drawers must meet the following requirements: – When attached to an ESS, up to six 7133 drawers can be installed in a Model

100 rack. A maximum of two Model 100s can be attached to an ESS.

– Only 7133 Model 020 and 7133 Model D40 drawers can be attached to the

ESS.

– You cannot attach drawers that have less than 16 DDMs to the ESS. All the

DDMs must be the same capacity. The ESS cannot support mixed DDMs on the same loop.

| |

– Any 7133 drawers you install must meet the 7133 drawer compatibility

requirements above.

– You need to migrate or remove all data on 7133 drawers and disband the

ranks/arrays before installing the 7133 drawers in the model 100.

IBM Enterprise Storage Server

See “Appendix C. Adding and Removing Drawers and Racks” on page 91 for more information on attaching 7133 drawers and racks to the ESS.

Connection hardware

This section includes the feature codes for:

v SCSI host cables v Fibre-channel cables v ESCON host cables v Remote power-control attachment cables

SCSI host cables

You need to order cables for each host adapter. Each host adapter provides two host connections (ports). Each host connection has a terminator; the connection to the ESS must be at the end of the SCSI bus.

For each SCSI host adapter (FC 3002), order two SCSI host cables:

9701 Ultra-SCSI cable (10 m for UNIX and Windows NT) 9702 Ultra-SCSI cable (20 m for UNIX and Windows NT) 9703 SCSI-2 fast and wide cable (10 m for IBM RS/6000 MCA adapter) 9704 SCSI-2 fast and wide cable (20 m for IBM RS/6000 MCA adapter) 9705 SCSI-2 fast and wide cable (10 m for IBM AS/400)

Chapter 2. Planning the physical configuration 37

9706 SCSI-2 fast and wide cable (20 m for IBM AS/400) 9707 SCSI-2 fast and wide cable (10 m for Sun and Hewlett Packard PCI

9708 SCSI-2 fast and wide cable (20 m for Sun and Hewlett Packard PCI

9709 SCSI-2 fast and wide cable (10 m for Hewlett Packard PCI single

9710 SCSI-2 fast and wide cable (20 m for Hewlett Packard PCI single

All cables support a 2-byte-wide bus with differential drivers. If you require a cable length that is not listed above, see your IBM field office.

Fibre-channel cables

For fibre-channel cable, order FC 3022 (IBM P/N 54G3384) which includes a fibre-channel short wave adapter card and a 31 m (93 ft), 50 µM short-wave optics cable. See your IBM field office if additional cables, longer cables, or 62.5 µM cables are required.

ESCON host cables

Each ESCON host adapter provides two host connections. Order two ESCON cables for each adapter for System/390 hosts. You can have your IBM field office order the cable using the OMCABLE transaction in Advanced Administrative Systems (AAS).

dual port)

port)

ports)

Each feature code 3011 gives you one host adapter card. Each adapter card requires two ESCON attachment cables: either the standard riser-rated cable, cable group number 3797, or the plenum-rated cable, cable group number 8486. The following table gives the connector IDs to order for the cables.

Table 9. ESCON cable connectors

Number of ESCON Host Adapter Feature Code 3011s to Order

2 2 4 151, 153, 251, 253 4 4 8 151, 153, 155, 157, 251,

6 6 12 151, 153, 155, 157, 159,

8 8 16 151, 153, 155, 157, 159,

10 10 20 151, 153, 155, 157, 159,

Number of ESCON Host Adapters

Number of Cables Connector ID

253, 255, 257

161, 251, 253, 255, 257, 259, 261

161, 163, 165, 251, 253, 255, 257, 259, 261, 263, 265

161, 163, 165, 167, 169, 251, 253, 255, 257, 259, 261, 263, 265, 267, 269

38 ESS Introduction and Planning

Table 9. ESCON cable connectors (continued)

Number of ESCON Host Adapter Feature Code 3011s to Order

12 12 24 151, 153, 155, 157, 159,

14 14 28 151, 153, 155, 157, 159,

16 16 32 151, 153, 155, 157, 159,

Number of ESCON Host Adapters

Number of Cables Connector ID

161, 163, 165, 167, 169, 171, 173, 251, 253, 255, 257, 259, 261, 263, 265, 267, 269, 271, 273

161, 163, 165, 167, 169, 171, 173, 175, 177, 251, 253, 255, 257, 259, 261, 263, 265, 267, 269, 271, 273, 275, 277

161, 163, 165, 167, 169, 171, 173, 175, 177, 179, 181, 251, 253, 255, 257, 259, 261, 263, 265, 267, 269, 271, 273, 275, 277, 279, 281

Remote-power-control attachment cables

You can order remote-power-control attachment cables for the ESS in quantities from one through eight. Table 10 gives the connector IDs.

Table 10. Remote-power-control attachment cable connectors

Remote Power Control Feature Code

1001 1178 1 through 8 01, 03, 05, 07, 09,

Cable Group Number

Language for the operator panel

The operator-panel language feature determines the language for operator panel labeling. If you do not specify a language, the default is English.

2924 English 2928 French 2929 German 2930 Japanese 2931 Spanish 2932 Italian 2935 Canadian French 2938 Brazilian Portuguese

Number of Cables Connector ID

11, 13, 15

2942 Belgian Dutch 2962 Chinese Traditional (ROC)

Chapter 2. Planning the physical configuration 39

2969 Korean 2980 UK English

Configuration changes

After IBM performs the initial logical configuration during ESS installation, use the ESS Specialist Web interface to reconfigure or deconfigure the logical configuration.

IBM can only perform capacity upgrades that are within the same DDM size.

Optional one-year warranty

The ESS comes with a three-year warranty. IBM also offers a one-year warranty. See your IBM field office for details.

Licensed internal code and optional software

The ESS includes licensed internal code (LIC) for the following features:

v Multiple allegiance v I/O priority queues v Concurrent copy

This section describes the following optional features for the ESS: v Parallel Access Volumes

v ESS Copy Services IBM service personnel enable these features for you. Order the feature code for the

capacity that is equal to or greater than the capacity of your ESS.

Parallel Access Volumes (PAV)

Order the PAV capacity that you need for your System/390 and zSeries hosts by using the following feature codes:

1800 Up to 0.5 terabyte (TB) 1801 Up to 1 TB 1802 Up to 2 TB 1803 Up to 4 TB 1804 Up to 8 TB 1805 Larger than 8 TB

OS/390 operating systems that support PAV include: V1R3, V2R4, V2R6, V2R7 (with program temporary fixes); and DFSMS/MVS

ESS Copy Services

This section lists the following information:

v Feature codes for FlashCopy v Feature codes for extended remote copy (XRC) v Feature codes for peer-to-peer remote copy (PPRC)

| |

v Guidelines for enabling and using ESS Copy Services v Planning ESS Web Copy Services configuration

™

1.3.0, 1.4.0, and 1.5.0.

40 ESS Introduction and Planning

See the information on the ESS command line interface (CLI) for open system hosts. You can use the command-line interface from your host system to invoke PPRC and FlashCopy.

See “FlashCopy and PPRC restrictions for open system hosts” on page 18 for additional information about PPRC and FlashCopy.

IBM Enterprise Storage Server Host Systems Attachment Guide

for

Feature codes for FlashCopy

Order the capacity you need for your System/390 hosts, SCSI, and fibre-channel attached host systems by using the following feature codes:

1830 Up to 0.5 TB 1831 Up to 1 TB 1832 Up to 2 TB 1833 Up to 4 TB 1834 Up to 8 TB 1835 Larger than 8 TB

Feature codes for Extended Remote Copy (XRC)

Order the Extended Remote Copy feature for the total capacity you need using the following feature codes:

1810 Up to 0.5 TB 1811 Up to 1 TB 1812 Up to 2 TB 1813 Up to 4 TB 1814 Up to 8 TB 1815 Larger than 8 TB

Feature codes for peer-to-peer remote copy

Order the capacity you need for your System/390 hosts, fibre-channel, and SCSI attached host systems for feature codes:

1820 Up to 0.5 TB 1821 Up to 1 TB 1822 Up to 2 TB 1823 Up to 4 TB 1824 Up to 8 TB 1825 Larger than 8 TB

both

the primary and secondary ESS. Use the following

Guidelines for enabling and using ESS Web Copy Services

This section gives an overview of ESS Copy Services followed by the guidelines for enabling and using ESS Web Copy Services.

OS/390

You can access and control ESS Copy Services functions from OS/390 host systems with OS/390 DFSMS. Alternatively, you can access and control ESS Copy Services functions for OS/390 host systems using the ESS StorWatch Web Copy

Chapter 2. Planning the physical configuration 41

Services function. The default setting for ESS is disable ESS Web Copy service Interface for S/390 hosts. If you are interested in using the Web Copy service Interface, you must identify the information in “Appendix B. Communication Resources (ESS Web Copy Services) work sheet” on page 89.

Note: You can invoke Extended Remote Copy (XRC), Concurrent Copy, PPRC,

and FlashCopy for IBM System/390 hosts with the IBM/System390 command functions.

Open Systems

ESS Web Copy Services is a Java-based client server application. The application consists of one primary server component, an optional backup server component, and one or more client components. The backup server refers to a server that can be started as a primary server in the event that the first primary server fails.

The implementation of these application components in a collection of ESS clusters forms an ESS Web Copy Services server group. This implementation allows users to define, execute and view the status of Copy Services functions and tasks in, and between the server group clusters. For example, the ESS Web Copy Services application allows a user to:

v Initiate a FlashCopy task for two volumes in one ESS cluster v Establish PPRC relationships for volumes in two ESS clusters v Execute predefined PPRC and FlashCopy tasks

Each ESS cluster within a server group runs the ESS Web Copy Services client component. The user designates one of the ESS clusters in a server group to also run the primary server component, and optionally designates another ESS cluster to run the backup server component. If the server group consists of ESS clusters installed at different locations, then the primary and backup servers should be assigned to ESS clusters that are remote from each other.

The ESS clusters that are part of a Copy Services (CS) server group use the TCP/IP network to communicate. You can configure two ESS Copy Services servers to a group. Each ESS Copy Services server group manages four clusters and a maximum of 2048 volumes. You have identified the assignment of the TCP/IP addresses within the Communication work sheet given to the CE during ESS installation. You enter this information on the Copy Services work sheet. See “Chapter 4. Planning for communication” on page 65 for the procedures for filling in this work sheet. (In order for this communication to work well, some type of name resolution has to be running in the users network.) IBM recommends using a domain name server (DNS) for name resolution. DNS resolves the names of the participating ESS clusters and enables ESS Web Copy Services to operate correctly. This includes allowing the open system hosts to run CLI for Copy Services automation. When DNS is not available, the IBM SSR can configure each ESS to provide name resolution.

Users access the ESS Web Copy Services interface from the ESS Specialist Introduction panel using an ESSNet console or a Web browser at a local workstation. Access to the ESS Web Copy Services from a browser window normally connects to the primary server, which has the overall view and control of the server group Copy Services configuration. The backup server provides similar view and control for handling when the primary server is unavailable. A user can access the backup server if the primary server is unavailable. A user must manually reset the Web Copy Services Function to connect to the backup server when the primary server is unavailable as in Disaster Recovery actions.

42 ESS Introduction and Planning

ESS Copy Services also includes a command-line interface (CLI). The CLI is a Java-based application package that you may optionally install on your open system host. The CLI application provides a set of commands that allow a user to write customized scripts for a host system that will initiate predefined tasks in an ESS Copy Services server application. You use the set of CLI commands to indirectly control ESS PPRC and FlashCopy tasks within an ESS Copy Services server group. The CLI is available for the following operating systems:

v AIX v Solaris v HP-UX v Windows NT 4.0 v Windows 2000

See the following ESS Web site for details about supported operating system levels.

www.storage.ibm.com/hardsoft/products/ess/supserver.htm Before using either the ESS Web Copy Services interface or the Open host

command-line interface, you or IBM must perform the following tasks:

1. Purchase ESS Copy Services features (FlashCopy, PPRC, or XRC).

2. If the ESS machine has already been installed, then the ESS needs to be upgraded to the 2105 LIC code that support Copy Services.

3. IBM installs and configures the ESS. The requirements include: a. Connect the ESS to the ESSNET Network. Install DNS (recommended) b. Install and activate the Copy Services LIC features.

Note: LIC features for F10/F20 is capacity limited. You can use the capacity

for Flash Copy and PPRC that you purchase. LIC features should be installed before you configure the machine.

c. For PPRC, install ESS ESCON host adapters. If you specify the ESCON

feature code with your initial order for an ESS, IBM will install the ESCON host adapters. After initial installation, you must order an MES to have IBM install the adapters.

Note: ESS ESCON host adapters are required for PPRC because

communication in a peer-to-peer relationship is through the ESCON channels.

d. For each ESS cluster in a Copy Services Server Group, decide if ESS Copy

Services commands should be enabled for S/390 volumes. Enter the information in “Appendix A. Communication Resources work sheet” on page 85.

Note: This information should be filled out for the SSR prior to the

installation of the ESS.

e. Configure the ESS clusters for the use of ESS Web Copy Services. For

each ESS in a Copy Services Server Group, enter the IP addresses of the ESS clusters that you have identified as the primary and backup servers in “Appendix B. Communication Resources (ESS Web Copy Services) work sheet” on page 89.

Chapter 2. Planning the physical configuration 43

f. Configure a domain name server (DNS) for ESS Copy Services. Enter the

information in “Appendix A. Communication Resources work sheet” on page 85.

g. Logically configure the ESS, allocate storage, and create logical unit

numbers (LUNs).

h. Attach the ESSs to your host systems; this enables you to identify, create,

and copy volumes.

i. If the HOSTS are already installed, make sure that you are at the correct

levels of HOST Install, SDD, and CLI. Note: There may be additional level requirements between CLI and the ESS

License Internal Code. When the SSR updates the ESS with new microcode, there may be a CLI code update.

j. Install the command line interface (CLI) on your open system hosts. You can

use the command-line interface from your host system to invoke PPRC and FlashCopy. CLI must have Java 1.1.8 support on the Open Host system. See

IBM Enterprise Storage Server Host Systems Attachment Guide

the information about CLI.

4. Run cfgmgr or operating system environment, to have the host system recognize the ESS volumes.

5. Run rsTestConnection to ensure that web Copy Services is running.

6. Run rsPrimeServer on your open host system. This script notifies the ESS Copy Services server of the mapping of your host

system disks to ESS volume serial numbers. This task allows you to view the Host system assigned volume with the Web Copy Services interface, from the Volume panel.

for more

Notes:

a. You must first authorize users before they can initiate this script from your

host system. CLI commands provide security level protection. See the

Enterprise Storage Server Host Systems Attachment Guide

IBM

b. This script must be run whenever there are changes to the volumes

accessed on a specific host.

c. rsPrimeServer with -d option should be run when you remove a host from

attachment to the ESS machine to remove the mapping from Web Copy Services Interface.

7. Run rsList2105s to get host disk to ESS volume association that can be used in defining Copy Services tasks.

8. The PPRC device-physical configurations (source and target devices) must be the same track format. Target volumes may be larger than the source volumes. For example, you can do a FlashCopy froma9GBLUNtoa16GBLUNfor data expansion.

See the

IBM Enterprise Storage Server Web Interface User’s Guide

for the

procedures on using PPRC and information about how to:

v Define disks to the primary host v Access the secondary disks v Control volume groups v Perform disaster recovery v Migrate data between storage servers

44 ESS Introduction and Planning

See “Planning ESS Copy Services configuration” for examples of site configurations for PPRC.

Planning ESS Copy Services configuration

This section provides examples of site configurations for Copy Services, and explains why you might select a particular configuration.

Example of a PPRC operational environment

For this example, assume that you have two sites, Site A and Site B. Each Site has a set of ESSs connected to the network. One of the ESS clusters at Site A has been configured as the ESS Web Copy Services primary server. One of the clusters at Site B has been configured as the ESS Web Copy Services backup server. Host systems at both Site A and Site B have installed the CLI for control of ESS Copy Services. ESS Copy Services code keeps data synchronized between the primary and the backup server.

| | | |

If for some reason, the Copy Services primary server is down, you can change the management of all the ESS clusters to the backup Copy Services server. The secondary Copy Services server then takes over the management of all the remaining ESSs.

A typical PPRC physical configuration might include: v A single logical storage server that is shadowed to a single secondary logical

subsystem

v All devices or a subset of devices in PPRC pairs This applies to a user who might have:

v All production applications and data located in a primary site v All secondary data located at a disaster-recovery site

Shadowing all data that is associated with a server to a backup site reduces the operational management complexity. This includes determining what data (on a file-by-file basis) the backup site requires to recover the application in the event of a disaster since all data is replicated at the secondary site.

A single storage server mirrored to a secondary server

IBM recommends mirroring all logical subsystems at the primary site to an identical logical subsystem at the secondary site. This includes:

v All production applications and data located in a primary site v All secondary data located in a secondary or disaster recovery site. For more

information on disaster recovery, see the

Interface User’s Guide

IBM Enterprise Storage Server Web

Generally, the files associated with an application or application set are dynamic in many environments. Consequently, you may choose to mirror all of the application data. This configuration requires minimal application storage-management analysis to guarantee optimal performance.

Bi-directional mirroring

With bi-directional mirroring, half of the devices are mirrored from ESS A to ESS B. The remaining half are mirrored from ESS B to ESS A.

This configuration distributes all inputs/outputs (I/O) across two ESSs instead of directing them to a single primary ESS.

Chapter 2. Planning the physical configuration 45

A combination configuration

You can combine any options to be managed as a single logical subsystem to a secondary-site logical subsystem (or bi-directional), such as:

v A volume list v A logical volume group

This option depends on the amount of ESS storage your operational environment has.

Any combination you select must meet these requirements: v The PPRC configurations (source and target devices) must be the same track

format. Target volumes may be larger than the source volumes. For example, you can do a FlashCopy froma9GBLUNtoa16GBLUNfordata expansion.

v PPRC source volumes and target volumes are mirror images of each other from

a host point of view. That is, all of the data that you can access from the primary host is exactly the same across the source and target PPRC volume.

Note: The volumes must be in full duplex mode.

v Additional requirements for fibre-channel, SCSI-attached host systems (open

systems), and System/390 hosts: – Because data on both the primary and secondary PPRC devices is identical,

the volume identifications are the same for both the source and the target volumes. Typically operating systems for open systems hosts, and their related file and related data base systems cannot easily manage LUNs with identical device identification.

IBM recommends that, for operational simplicity, you attach and address the PPRC primary devices from the primary production server. IBM recommends that you also attach and address the PPRC secondary devices from the secondary production server or the recovery server.

– The ESS protects open system PPRC secondary volumes from host access.

This protection ensures data integrity and data consistency between the PPRC primary and secondary volumes.

| | | | | | |

| |

Consequently, you must execute a task at the ESS Copy Services server to terminate the PPRC pair before you can use the backup volumes. This action recovers or returns the PPRC secondary device to simplex mode, allowing host system access to secondary volumes. Another option is to do a FlashCopy of the secondary volume without terminating the PPRC pair. The FlashCopy can be used to read the secondary data at a particular point in time.

v IBM also recommends the following:

– The Copy Services primary server be accessible from both the primary and

secondary sites.

– The primary and backup copy services servers should be physically located

on different sites for disaster recovery purposes.

| |

IBM recommends that you configure ESS Copy Services primary/backup servers to run on cluster 1.

IBM Subsystem Device Driver

The IBM Subsystem Device Driver feature supports multiple or redundant data paths for shared LUNs. Multi-pathing reduces the potential for a single point of failure on an ESS.

46 ESS Introduction and Planning

See

IBM Subsystem Device Driver

for information about using this ESS option. This book describes how to install and use the IBM Subsystem Device Driver on SCSI and fibre-channel attached host systems to enhance availability for the ESS.

Chapter 2. Planning the physical configuration 47

48 ESS Introduction and Planning

Chapter 3. Installation planning

This chapter includes information for installation planning:

v Host system support v Software requirements v Equipment requirements v Site requirements

Equipment requirements

Your shipment of the IBM Enterprise Storage Server includes:

| |

v Two ESS cover keys. If you open the ESS, please be aware of IBM safety

concerns. The tag to the keys has the following caution notice:

CAUTION: This machine is certified to be serviced by trained personnel only.

| |

1062

v Licensed internal code (LIC) compact disc.

Note: IBM service enables or disables any LIC features on your ESS.

v Host interface cards for the ESS. See “Adapter features” on page 29 and

“Connection hardware” on page 37. Enterprise Systems Connection (ESCON), small computer system interface (SCSI), and fibre-channel host adapters and cables for the ESS.

v Compact disc for the host adapters. v Compact disc that includes installation scripts for the 2105 (ESS) host

attachment for AIX and HP-UX , and installation instructions for the IBM Subsystem Device Driver.

v Modems, modem switches, cables, and power cables for remote support. See

“Remote support switch” on page 27.

v The IBM workstation, cables, and power cables for ESSNet. v The extension cord that the service provider uses to connect the service terminal

to a power outlet. See “Extension cords” on page 28.

v Compact disc for the IBM Subsystem Device Driver. v Customer documents compact disc, SK2T-8770

This compact disc includes a softcopy of the ESS customer publications. See “The ESS product library” on page xvi for a list of the books.

Additional items that are shipped with the ESS for use by authorized service personnel, include:

v State-save diskettes

One set of blank diskettes that are used for extracting state-save information during service.

Note: The ESS diskette drive only reads diskettes with 1.44-MB format that a

v Service documents compact disc, SK2T-8771

This compact disc includes softcopies of the ESS service guides, ESS parts catalog, and the ESS customer publications.

1.44-MB drive has formatted.

v Hardcopies of the service guide. v Two compact discs for the operating system. v Compact disc for the operating system for program temporary fixes (PTFs). v Compact disc for the operating system for service diagnostics.

You also need the following equipment for installing and operating the ESS:

v An analog telephone line near the ESS to enable remote support. The service

v Power cable connectors. The ESS requires two power cables that are country

| | |

v Power outlets that are compatible with the extension cords listed in “Extension

Engineering changes

IBM might periodically release engineering changes (ECs) to the materials in the ship group to correct problems or provide additional support. IBM might ship ECs as either mandatory or optional field bills. You should install the mandatory field bills as directed by IBM.

interface provides an RS232 connection, through a modem switch, to the analog telephone line.

dependent and location dependent. You need the correct connectors as identified in “Power cable and power connector requirements” on page 60 and “Power cable connectors” on page 61.

cords” on page 28. Outlets must be within3m(9ft)oftheESS. See “Power features” on page 25 for details on power requirements.

Notes:

1. The compact disc label indicates the EC level of the LIC.

2. The ESS stores three EC levels of LIC code for the ESS and for any DDMs that IBM has installed on the ESS. The ESS stores a new EC level prior to activating it as the current level.

Site requirements for the ESS

See Table 11 on page 51 for the physical characteristics of the IBM Enterprise Storage Server.

IBM ships all models in an Arbo Crate. The Arbo Crate weighs 228 kg (504 lbs). The local carrier is responsible for delivering the ESS as close to its final location as possible. The carrier is also responsible for unloading the ESS and removing the crate and returning it to IBM.

To compensate for the weight of the ESS models, IBM recommends that the loading dock ramp at your site does not exceed an angle of 12°.

CAUTION: A fully configured unit in the crate can weigh up to 1500 kilograms (3305 pounds). Use of less than three persons to move it can result in injury.

1060.

Table 11 on page 51 gives the dimensions and weights of the ESS models.

50 ESS Introduction and Planning

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Table 11. ESS dimensions and weights

Model Dimensions, Meters

(Inches) (See Note 1.)

E10 or F10

E20 or F20

Model E20 or F20 with the expansion enclosure (See Notes 3 and 5.)

Model 100 (See Note 6)

Height 1.796

(70.7) (See Note

2.)

Width 1.383

(54.4)

Depth 0.91

(35.8)

Height 1.796

(70.7) (See Note

2.)

Width 1.383

(54.4)

Depth 0.91

(35.8)

Height 1.796

(70.7)

Width 2.938

(115.7)

Depth 0.91

(35.8)

Height 1.780

(70)

Width Width

0.840 (33)

Depth Depth

1.305 (51)

Dimensions with Arbo Crate, Meters (Inches)

Height 2.075

(81.69) (See Note

2.)

Width 1.573

(62.00)

Depth 1.067

(42.00)

Height 2.075

(81.69) (See Note

2.)

Width 1.573

(62.00)

Depth 1.067

(42.00)

Height 2.075

(81.69)

Width 3.128

(123.30)

Depth 1.067

(42.00)

Height 2.045

(80.5)

Width Width

1.016 (40)

Depth Depth

1.499 (59)

Maximum Weight (Fully Configured)

1000 kg (2200 lbs)

1204 kg (2650 lbs)

2545 kg (5600 lbs)

770 kg (1696 lbs)

Maximum Weight with Arbo Crate

1228 kg (2704 lbs)

1432 kg (3154 lbs)

(See Note

4.)

928 kg (2046 lbs)

Chapter 3. Installation planning 51

Table 11. ESS dimensions and weights (continued)

Model Dimensions, Meters

(Inches) (See Note 1.)

Notes:

1. These dimensions include casters and covers. (The casters are recessed and do not require extra clearance.)

2. These dimensions exclude the top cover. With the top cover, the height is 1.915 m (75.3 in.).

3. Models E10 and F10 do not support the expansion enclosure.

4. Models E20 and F20 and the expansion enclosure are shipped in separate crates. With the Arbo Crate, the expansion enclosure weighs 1500 kg (3305 lbs).

5. Install the expansion enclosure to the right (as you face its front) of Models E20 and F20.

6. Install the Model 100 to the right (as you face its front) of Models E10/E20 and E10/F20.

Dimensions with Arbo Crate, Meters (Inches)

Maximum Weight (Fully Configured)

Maximum Weight with Arbo Crate

IBM recommends that you install the ESS on a raised floor. When you install the ESS, you can cut out tiles for cable entry at the front. IBM recommends that you place two fully perforated tiles in front of the ESS for cooling.

Center all openings and cutouts at the front of the enclosures. See Table 12 for the dimensions for the cutouts. See Figure 9 on page 53 for the cutout locations, and the clearances that are required for the doors. The ESS has recessed casters that do not require extra clearance.

Table 12. Cable cutout dimensions (maximum size)

Model Floor Cutouts, Meters (Inches)

E10, F10, E20, and F20 0.10 x 0.91 (4 x 36) Expansion enclosure 0.10 x 0.25 (4 x 10) 100 Front: 0.15 x 0.15 (6 x 6)

Rear: 0.15 x 0.15 (6 x 6)

52 ESS Introduction and Planning

138.4

(54-1/2)

129.5 (51)

114.3 (45)

74.9

(29-1/2)

86.3 (34)

68.9

(27-1/8)

56.5

(22-1/4)

19.9

(7-7/8)

7.6 (3)

22.8 (9)

24.1

(9-1/2)

22.8 (9)

71.1 (28)

90.8

(35-3/4)

19.9

7.6 (7-7/8)

(3)

83.4

(32-7/8)

Figure 9. Cable cutout and door clearance for Models E10, F10, E20, and F20

The reference keys in Figure 9 identify the following locations:

«1¬ is the front of the enclosure. «2¬ is the rear of the enclosure. «3¬ is the cutout for the power cables. Expansion enclosure only. «4¬ is the cutout for the Enterprise Systems Connection (ESCON), fibre channel,

small computer system interface (SCSI) cables, and power cables. (Models E10, F10, E20, F20)

Dimensions shown are centimeters (inches).

S008303R

Chapter 3. Installation planning 53

The dimensions and cutouts for the expansion enclosure are the same as for Models E10, F10, E20, and F20. However, the expansion enclosure does not require «4¬, the cutout for the ESCON, fibre channel, or SCSI cables.

76.6

2.5 (1)

(30-1/8)

(11-7/8)

(6)

102

(40-1/8)

(6)

107

(42-1/8)

128.6

(50-5/8)

76.6

(30-1/8)

(29-1/2)

Figure 10. Cable cutout and door clearance for Model 100

The reference keys in Figure 10 identify the following locations:

«1¬ is the front of the enclosure. «2¬ is the rear of the enclosure. «3¬ is the cutout for power cables

Dimensions shown are centimeters (inches).

54 ESS Introduction and Planning

(33)

S009111

Service clearance and floor-loading requirements for the ESS

Table 13 shows the clearances that the ESS requires for service and for the floor-loading requirements.

Table 13. Clearance and floor-loading requirements

Configuration and Weight

2105 Model E10 and F10, Weight 998 kg (2200 lbs) Note 2

2105 Model E20 and F20, Weight 1202 kg (2650 lbs) Note 2

2105 Model E20 and F20 with Expansion Enclosure, Weight 2540 kg (5600 lbs) Note 2, 4, 5

Service Clearance Floor

Loading,

lbs/ft²

(See

Front Rear Sides Front Rear

864mm (34 in.)

864 mm (34 in.)

1145 mm (45 in.)

Notes 1

and 3.)

610 kg/m² (125 lb/ft²)

488 kg/m² (100 lb/ft²)

439 kg/m² (90 lb/ft²)

361 kg/m² (70 lb/ft²)

610 kg/m² (125 lb/ft²)

488 kg/m² (100 lb/ft²)

439 kg/m² (90 lb/ft²)

342 kg/m²(70 lb/ft²)

610 kg/m² (125 lb/ft²)

488 kg/m² (100 lb/ft²)

439 kg/m² (90 lb/ft²)

342 kg/m² (70 lb/ft²)

Dedicated Weight Distribution

Areas mm (in.) (See Notes 3, 4,

6, and 7.)

0mm(0 in.)

76 mm (3 in.)

184 mm (7.25 in.)

559 mm (22 in.)

15 mm (.6 in.)

229 mm (9 in.)

368 mm (14.5 in.)

762 mm (30 in.)

0mm(0 in.)

413 mm (16.25 in.)

711 mm (28 in.)

762 mm (30 in.)

356 mm (14 in.)

432 mm (17 in.)

483 mm (19 in.)

381 mm (15 in.)

432 mm (17 in.)

762 mm (30 in.)

356 mm (14 in.)

572 mm (22.5 in.)

610 mm (24 in.)

572 mm (22.5 in.)

762 mm (30 in.)

Chapter 3. Installation planning 55

Table 13. Clearance and floor-loading requirements (continued)

Configuration and Weight

2105 Model 100, Weight 771 kg (1700 lbs) Note 2, 6, 8.

2105 Model 100s, Weight 1542 kg (3400 lbs) Note 2, 7, 8

Service Clearance Floor

Loading,

lbs/ft²

(See

Front Rear Sides Front Rear

1145 mm (45 in.)

813 mm (32in.)

Notes 1

and 3.)

610 kg/m² (125 lb/ft²)

488 kg/m² (100 lb/ft²)

439 kg/m² (90 lb/ft²)

342 kg/m²(70 lb/ft²)

610 kg/m² (125 lb/ft²)

488 kg/m² (100 lb/ft²)

439 kg/m² (90 lb/ft²)

342 kg/m² (70 lb/ft²)

Dedicated Weight Distribution

Areas mm (in.) (See Notes 3, 4,

0mm(0 in.)

102 mm (4 in.)

178 mm (7 in.)

425 mm (16.75 in.)

0mm(0 in.)

178 mm (7 in.)

330 mm (13 in.)

762 mm (30 in.)

6, and 7.)

318 mm (12.5 in.)

572 mm (22.5 in.)

419 mm (16.25 in.)

572 mm (22.5 in.)

635 mm (25 in.)

559 mm (22 in.)

406 mm (16 in.)

419 mm (16.25 in.)

406 mm (16 in.)

56 ESS Introduction and Planning

Table 13. Clearance and floor-loading requirements (continued)

Configuration and Weight

Notes:

1. IBM recommends that you install the ESS on a floor with a minimum of 342 kg/m² (70 lbs/ft²) strength.

2. Floor loads are calculated for maximum weight of the storage server.

3. Side clearances are for both sides of an ESS expansion enclosure. Clearances on both sides are dedicated to the ESS. Adjacent expansion enclosures must have their own floor-loading clearance.

| | | | |

| |

| | |

4. If you install a Model E20 or F20 with an expansion enclosure, the floor strength must be 440 kg/m² (90 lbs/ft²). At 342 kg/m² (70 lbs/ft²), the side clearance exceeds the 762-mm (30-in.) maximum allowed. Consult a structural engineer if you are unsure about the correct placement and clearances of these machines for floor-loading distribution.

5. Multiple expansion enclosures are bolted together with 280-mm (11-in.) spacers. Move the side cover from the Model E20 or F20 to the side of the expansion enclosure.

6. The Model 100 is recommended to be placed to the right side of the E20 and F20. Distance between the frames is dictated by the floor loading of each machine.

7. When having two Model 100s, the Model 100 frames are bolted together with a 40 mm (1.6 in) spacer between them, and physically positioned to the right of the Model E20 or F20.

8. There can be a maximum of six drawers in a Model 100.

9. A clearance of 102 mm (4 in.) on each side of the ESS is required to open the covers to 90 degrees.

10. If you place an ESS Model E10, E20, F10, or F20 next to each other, a clearance of 102 mm (4 in.) is required between the sides of the models. This clearance allows you to open the doors.

Service Clearance Floor

Loading,

lbs/ft²

(See

Front Rear Sides Front Rear

Notes 1

and 3.)

Dedicated Weight Distribution

Areas mm (in.) (See Notes 3, 4,

6, and 7.)

When you attach the IBM 2105 Model 100 expansion enclosure to the ESS, follow the floor loading requirements in Table 13 on page 55. This table also gives the side clearances that are required for both sides of the installation. For more information on the IBM 2105 Model 100, please see the

Model B09

, which can be accessed at the following web site:

www.storage.ibm.com/hardsoft/products/vss/books/vssrefinfo.htm

Planning for installation of the ESSNet

IBM installs the IBM Enterprise Storage Server Network (ESSNet) when they install your ESS.

IBM provides the power cables for the ESSNet. You provide:

v A location for the ESSNet hub that is within 15 m (50 ft) of the ESS. v A location for the ESSNet console (workstation and monitor) that is within 15 m

(50 ft) of the hub.

v Three outlets (for the workstation, monitor, and hub).

Introduction and Planning Guide 2105

Chapter 3. Installation planning 57

If you are attaching your network to the ESSNet hub, you also need to provide an Ethernet cable and TCP/IP information to IBM. IBM will connect your LAN cable to the ESSNet hub after the ESS and the ESSNet are installed and in operation.

You are responsible for firewall protection for the ESSNet. You also need to provide a table or a stand for the ESSNet workstation at your site.

The workstation is a personal computer (PC) and a monitor. The weight and dimensions for the PC are:

PC weight 11 kg (25 lbs) PC height 128 mm (5 in.) PC width 440 mm (17.7 in.) PC depth 440 mm (17.7 in.)

The approximate weight and dimensions for the monitor are:

Monitor weight 18 kg (38 lbs) Monitor height 432 mm (17 in.) Monitor width 406 mm (16 in.) Monitor depth 432 mm (17 in.)

The monitor has a 75 mm (15 in.) screen. The combined weight of the monitor and the PC does not exceed 30 kg (65 lbs).

Power requirements

This section provides power and cooling requirements and environmental information for the ESS.

Input voltages and frequencies

See Table 14 for the input voltages and frequencies that the ESS supports. The values apply to both primary power cables on any expansion enclosure or any model. Inputs are either single phase or balanced three phase depending on the connector type as described in “Power cable connectors” on page 61. Also see “Power features” on page 25 for information about power features.

Table 14. ESS input voltages and frequencies

Characteristic Value

Nominal input voltages 200, 208, 220, 240, 380, 400, 415,

or 480 RMS V ac Minimum input voltage 180 RMS V ac Maximum input voltage 512 RMS V ac Steady-state input frequencies 50 ± 0.5 or 60 ± 0.5 Hz PLD input frequencies (<10 seconds) 50 ± 2.0 or 60 ± 2.0 Hz

Power consumption and environmental information

Table 15 on page 59 gives power consumption and environmental information on the ESS.

58 ESS Introduction and Planning

Table 15. Power consumption and environmental information for the ESS

Measurement Units Models E10 or

F10

Electric power kVA 3.5 5 12 Thermal load BTU/hour 11 000 16 000 40 000 Capacity of

exhaust (See Note.)

Single-phase and three-phase leakage current

Startup current Amps ≤ 100 ≤ 100 ≤ 100 Startup current

duration Idle and

operating-sound power (LwAd)

Idle and operating-sound pressure (LpA)

Note: The ESS takes air in through the front cover and exhausts air from the rear and top.

Cubic meters per min (cubic ft per min)

Milliamps 17 17 17

microseconds < 200 < 200 < 200

bels 7.5 7.5 Not applicable

decibels 59 59 Not applicable

44.2 (1500) 51.8 (1800) 102.7 (3600)

Models E20 or F20

Models E20 or F20 with Expansion Enclosure

Cooling requirements

For cooling, install two fully perforated tiles in front of each ESS. Also install one fully perforated tile in front of an expansion enclosure and one fully perforated tile at the back of an expansion enclosure.

Operating environment

The following sections list the environmental operating points and ranges that IBM recommends for the ESS.

Power on environment

Table 16 gives the operating extremes for an ESS with the power on.

Table 16. Operating extremes with the power on

Altitude 0 - 2133 m (7000 ft) Dry Bulb Temperature 16 - 32°C (60 - 90°F) Relative humidity 20 - 80% Wet Bulb Temperature 23°C (73°F)

Table 17 gives the operating points that IBM recommends for an ESS with the power on.

Table 17. Recommended operating points with the power on

Temperature (See Attention) 22°C (72°F) Relative humidity (See Attention) 45%

Chapter 3. Installation planning 59

Table 17. Recommended operating points with the power on (continued)

Attention:

If you deviate substantially in either direction from these recommended operating points for extended, consecutive hours, you expose the ESS to malfunction from extreme causes.

Table 18 gives the operating ranges that IBM recommends for an ESS with the power on.

Table 18. Recommended operating ranges with the power on

Temperature 20 - 25°C (68 - 77°F) Relative humidity 40 - 50%

Power off and storage environments

Table 19 gives the temperatures and humidity that IBM recommends for an ESS with the power off.

Table 19. Recommended temperatures and humidity with the power off

Temperature 10 - 43°C (50 - 110°F) Relative humidity 8 - 80% Wet Bulb Temperature 27°C (80°F)

Table 20 gives the temperatures and humidity that IBM recommends for storing an ESS.

Table 20. Recommended temperatures and humidity while in storage

Temperature 29°C (84°F) Relative humidity 5 - 80% Wet Bulb Temperature 29°C (84°F)

Recommended storage points or ranges

| |

|| || ||

Energy saving law

The recommended storage points or ranges are:

Wet bulb 29°C (84°F) Temperature 1 - 60°C (34 - 140°F) Relative humidity 5 - 80%

The energy savings for all ESS models is:

0.001 Watts/MB for MB > 160, Category G.

Power consumption in energy savings mode is not applicable.

Power cable and power connector requirements

This section describes ESS power cable requirements and power connector requirements. See “Power cables” on page 26 for the power-cable feature codes.

60 ESS Introduction and Planning

Power cable connectors

Table 21 on page 62 shows the power cables, in-line connectors, and receptacles. Select the feature code that is appropriate for your site. Phase rotation on three-phase power-cable connectors is counterclockwise as you look at the plug. Phase rotation is clockwise as you look at the face of the power receptacle.

Chapter 3. Installation planning 61

Table 21. ESS power cable connectors

Power cable Feature Code

9801, 9986 1-phase, 50/60 Hz 50 A (See

9802 1-phase, 50 Hz (See Notes 4

9803 1-phase, 50/60 Hz, 60 A (See

9851, 9987 3-phase, 50/60 Hz, 50 A (See

9988, 9854 3-phase, 50/60 Hz, 60 A (See

9852 3-phase, 50 Hz, (See Notes 5

9853 3-phase, 50/60 Hz, 60 A (See

Notes:

1. All power cables are rated at 600 V ac except power cables for Japan, which are 250 V ac. Single-phase power cables have 2 poles and 3 wires. Three-phase power cables have 3 poles and 4 wires.

2. Connector and receptacle types indicated are Russell Stoll except types for Japan, which can use any manufacturer.

3. All power cables are 4.7 m (14 ft) long except Chicago, which is2m(6ft)long.

4. Not available on the Model E20 or F20 or the expansion enclosure.

5. Not available on the Model E10 or F10.

6. Install IEC309 receptacle in a metal-backed box with the green wire ground-connected to the grounding lug within the box. Ensure continuity between the box and the metallic shielding of the liquid-tight conduit.

7. The 7428-78 in-line connector must have the appropriate JPA adapter included in the assembly to ensure continuity between the connector housing and the metallic shielding of the liquid-tight conduit.

8. IBM recommends that you attach these in-line connectors to a liquid-tight, metallic-shielded conduit, using adapter C75 for 1.89 cm (3/4-in.) conduit, or using C10 for 2.54 cm (1-in.) conduit.

9. These receptacles require back box 3711A.

10. For low-voltage, single phase installations (200 V to 240 V), IBM recommends a minimum rated circuit breaker of 40 amperes, and not to exceed the wire rating of the facility.

11. For low-voltage, three phase installation (200 V to 240 V), IBM recommends a

minimum rated circuit breaker of 25 amperes, and not to exceed the wire rating of the facility.

12. For high-voltage, single phase installations (380 V to 415 V), IBM recommends a minimum rated circuit breaker of 20 amperes, and not to exceed the wire rating of the facility.

13. For high-voltage, three phase installations (380 V to 415 V), IBM recommends a minimum rated circuit breaker of 15 amperes, and not to exceed the wire rating of the facility.

Power cable Description (See Notes 1 and 3.)

Notes 4 and 10.)

and 10.)

Note 4.)

Notes 5 and 10.)

and 11.)

Note 5.)

In-line Connector (See Note 2.)

9C53U0 (See Note

8.)

No connector Hard wire (See

Not used 360R6W (See

9C54U0 (See Note

8.)

7428-78 (See Note

7.) No connector Hard wire (See

Not used 460R9W (See

Receptacle (See Note 2.)

9R53U0W (See Note 9, 10, and

12.)

note 10 and 12.)

Note 6, 10, and

12.) 9R54U0W (See

Note 9, 11, and

13.) 7324-78 (See note

11 and 13.)

note 11 and 13.)

Note 6, 11, and

13.)

62 ESS Introduction and Planning

Outlet power for the extension cord

Each ESS model E10, F10, E20, or F20 includes a 4.7-m (14-ft), multiple-outlet extension cord. Service personnel use the outlets within the ESS to power service tools.

You must supply an appropriate receptacle for the extension cord at your site for each ESS model. The ESS supports various power cable plugs to accommodate your site. The outlet circuit should support at least 1200 W.

Remote service connection

You need to connect each ESS to a modem and a remote support switch. With the remote support switch, you can attach up to seven ESSs. The modem connection and the switch connection allow service personnel to perform service remotely. See “Remote support features” on page 26 for information on remote support feature codes.

Locate and provide power to the remote support switch and modem externally from the ESS. The cable from the ESS to the remote support switch is 16 m (50 ft) long. The cable from the remote support switch to the modem is 3.33 m (10 ft) long. You supply the cable to connect the modem to a telephone jack.

Select the appropriate power cables for the modem and for the remote support switch. Make your selection based on the feature code for the remote support-switch power cable.

The modems that IBM offers are for worldwide use, and they meet all required standards.

Connect the remote support switch to the serial port of each cluster in the ESS.

Remote service outlet power

You supply an appropriate receptacle for each modem and each remote support switch. The ESS supports various power cable plugs to accommodate different geographies. The country code determines which plug IBM supplies with the product.

Remote power control

The ESS supports up to eight S/360 remote power-control interfaces to allow remote power control.

Remote service telephone lines

You need one or more analog telephone lines to support remote service. Determine the number of telephone lines you need by the number of ESSs you are installing. You also provide the telephone cable that connects the modem to the telephone-line jack. An expander supports one telephone line.

Chapter 3. Installation planning 63

64 ESS Introduction and Planning

Chapter 4. Planning for communication

This chapter provides guidelines for completing the Communication Resources work sheet (see “Guidelines for completing the Communication Resources work sheet”) and the ESS Copy Services work sheet (see “Communications for ESS Web Copy Services” on page 73).

Communication overview

During installation IBM establishes communication links between the ESS and your storage management personnel, and between the ESS and service personnel.

IBM installation personnel use the information from the work sheet to establish communications between your host system and the ESS.

After IBM has installed the ESS, you can change the communication settings from the Web interface. See the

Guide

Specialist to change the settings. The Communication Resources work sheet allows you to define how the various

communications functions within the ESS should be configured. It also lets you authorize or deny access to your ESS by service personnel. The following communications functions are available:

v Enable outgoing modem calls

v Enable remote login

v Optional remote access password

for guidelines on using the IBM StorWatch Enterprise Storage Server

You control this remote service. IBM recommends that you enable this service by checking Yes. When you enable outgoing-modem calls, the ESS places the call-back password in the header of each call home record. The call-back password allows your service provider to login to the ESS in response to the service call.

You control this remote access. IBM recommends that you enable this service by checking Yes. Service personnel can login to the ESS with the call-back password.

This password adds further security to the support login ID. This password should be set in agreement between you and IBM service personnel.

IBM Enterprise Storage Server Web Interface User’s

With access to the ESS, service personnel can perform service tasks, such as viewing error logs and problem logs and initiating trace or dump retrievals.

Guidelines for completing the Communication Resources work sheet

Use the following guidelines when completing the work sheet that is shown in “Appendix A. Communication Resources work sheet” on page 85:

1. Time zone configuration and date configuration a. Time zone

Fill in the time zone that applies to this machine. Select one of the following items. The number in parentheses shows the time adjustment from Coordinated Universal (CUT) time, in hours. Enter this number (with the plus or minus) in the field:

v Coordinated Universal v United Kingdom (0)

v Azores; Cape Verde (-1) v Falkland Islands (-2) v Greenland; East Brazil (-3) v Central Brazil (-4) v Eastern U.S.; Columbia (-5) v Central U.S.; Honduras (-6) v Mountain U.S. (-7) v Pacific U.S.; Yukon (-8) v Alaska (-9) v Hawaii; Aleutians (-10) v Bering Straits (-11) v New Zealand (+12) v Solomon Islands (+11) v Eastern Australia (+10) v Japan (+9) v Korea (+9) v Western Australia (+8) v Taiwan (+8) v Thailand (+7) v Tashkent; Central Asia (+6) v Pakistan (+5) v Gorki; Central Asia; Oman (+4) v Turkey (+3) v Saudi Arabia (+3) v Finland (+2) v South Africa (+2) v Norway; France (+1)

b. Daylight savings

Check Yes if this location goes on daylight savings time; check No if it does not.

2. TCP/IP configuration The following guidelines are for basic TCP/IP configuration. For advanced

TCP/IP configuration, see the

and Networks, Version 4

AIX System Management Guide: Communications

, SC23-2526. Work with the IBM service personnel at

your ESS site to set up advanced TCP/IP configuration on the ESS. If you want to attach your LAN to the ESSNet hub, you need to provide the

following TCP/IP information to IBM. IBM will connect your LAN cable to the ESSNet hub and enter the TCP/IP information.

Note: IBM will attach your LAN

a. Network interface

Select one of the following network interfaces:

The difference between these two choices is the header format. On the same local network, all stations must use the same header format.

b. Cluster 1 hostname

Enter the hostname that you are assigning to cluster 1 for access over the network. For example, Storage00.

66 ESS Introduction and Planning

after

the ESS and ESSNet are installed and in

operation.

en0 Standard Ethernet et0 Institute of Electrical and Electronics Engineers (IEEE) 802.3

Ethernet

Note: The hostname you define here is also the Web site address for

access to ESS Specialist in cluster 1 or cluster 2.

The ESS has two independent clusters (cluster 1 and cluster 2). The clusters provide management functions for the ESS. The clusters also manage the interfaces to host devices and to external local area networks (LANs). Each cluster manages approximately half of the attached storage.

c. Cluster 1 Internet address

Enter the dotted decimal address you are assigning to cluster 1 of this machine. For example, 9.113.152.148.

d. Cluster 2 hostname

Enter the hostname that you are assigning to cluster 2 for access over the network. For example, Storage01.

e. Cluster 2 Internet address

Enter the dotted decimal address you are assigning to cluster 2 of this machine. For example, 9.113.152.149 .

f. ESSNet workstation hostname

Enter the hostname that you are assigning to ESSNet for access over the network. For example, ESSNet1.

g. ESSNet workstation Internet address

Enter the Internet address that you are assigning to ESSNet for access over the network. For example, 555.555.555.0.

h. Network mask

Enter the dotted decimal network mask that you are applying to TCP/IP on this machine. For example, 255.255.255.0.

i. Nameserver Internet address

Enter the dotted decimal address of the nameserver that this machine is to access. For example, 9.113.42.250.

j. Nameserver domain name

Enter the domain name of the nameserver. For example, tucson.ibm.com.

k. Default gateway address

Enter a dotted decimal or symbolic name as the address of the default gateway for this machine. For example, 9.113.155.254 or sanjosegate.

l. Ethernet adapter mode

Select half-duplex mode for the Ethernet adapter. The mode must match the mode of the external switch or router to which you are connecting the adapter.

3. Customer information Enter information that you feel might be useful to your service provider, such as: a. Business name or company name

IBM support uses this information; this information should be consistent for all machines within an account.

b. Location

Enter the location of the ESS (city, street address, and building).

c. Telephone number

This is the telephone number where service personnel can contact you.

d. Name of contacts

Chapter 4. Planning for communication 67

These are the names of individuals at your site that service personnel can contact about ESS service matters.

e. Electronic mail (e-mail) address

Note: IBM strongly recommends that you list at least one e-mail address.

This address will receive information when product engineers or service support personnel connect to your machine.

4. Enable ESS Specialist Check either Yes or No. IBM service will enable or disable ESS Specialist

during installation of your ESS. ESS Specialist is the Web interface that you and IBM use to configure the ESS. When you enable ESS Specialist, you can use it to change the configuration.

5. Call home and remote services

| | |

Complete all of this information except the Remote telephone numbers field and the Support catcher telephone number field. IBM service personnel or your service provider completes these fields.

a. Enable the incoming calls

The ESS can accept the incoming calls. Check Yes to enable these calls. Check No to disallow or deny these calls.

b. Enable outgoing modem calls

The ESS can place a call to IBM service or to your service provider when it requires service. Check Yes to enable these calls. Check No to disallow or deny these calls.

c. Call home heartbeat interval

Enter0-15days to set the length of time between heartbeat call homes from the ESS clusters to IBM. IBM uses this record to monitor the health of the call home process for each cluster. If you enter 0, the ESS does not send a call home heartbeat. The default interval is 5 days.

d. Enable e-mail across the LAN

The ESS can send e-mail to your LAN when it requires service. It sends e-mail through the ESSNet if you have attached your LAN to the ESSNet external hub. Check Yes to enable e-mail. Check No to disable e-mail.

e. Enable pager messages

The ESS can send problem information to your pager if you have attached your LAN to the ESSNet external hub. Check Yes to enable pager messages. Check No to disable pager messages. See step 9 on page 71 for details about pagers.

f. Remote telephone numbers

IBM service personnel or your service provider completes this information. The telephone numbers should include area codes and country codes, when appropriate.

| |

| | |

g. Support catcher telephone number

IBM service personnel or your service provider completes this information. The telephone numbers should include area codes and country codes, when appropriate. The SSR personnel who do not know this number should call the next level of support for this information.

Service personnel use this telephone number to send heartbeat call home records that are non-problem related, directly to the support catcher server rather than to the catcher server for remote technical-assistance

68 ESS Introduction and Planning

information network (RETAIN). These records might include such information as a trace, dump package, and the activation of Step Ahead Storage usage.

h. Call-back (local modem) telephone number

Enter the external telephone number of the line to the modem that is connected to this machine. Include all area codes and all country codes, when appropriate.

Note: Multiple ESSs can share a telephone modem if you install a modem

switch.

i. Customer-contact telephone numbers

Enter the primary and off-shift telephone numbers that service personnel can use to contact someone at your ESS site to discuss service matters. Include all area codes. An off-shift number could be the backup number. These telephone numbers should be for the individuals you name for contacts in step 3 on page 67.

j. Call-back password

Enter 1 to 8 characters for the password. This is a mandatory entry. The ESS sends this public password with each call-home record. IBM suggests that you set support as the password.

k. Outside line prefix

This is the number you dial to access an outside line. Enter up to three numbers in this field.

l. Enable remote IBM PE login across a LAN

Check Yes to enable IBM product engineering (PE) personnel to login to the ESS. The PE personnel have service experience and development experience for this product. Check No to disallow this access.

6. Modem configuration IBM service personnel or your service provider completes this information. A list

of the fields follows for your information. a. Name of modem set

Note: DeskPorte Fast should be entered if a MultiTech MultiModem was

shipped

b. Dialer telephone system

Select tone or pulse.

c. Modem data rate

Select one of the following:

Fastest possible speed 14400 16800 19200 21600 24000 26400 28800

Note: IBM recommends that you select Fastest possible speed.

d. Cancel the call if it does not connect within 30 - 180 seconds. IBM

recommends 45 seconds. e. Number of consecutive retries for connection f. Name of the expander set g. Expander port for the modem h. Expander port for cluster 1

Chapter 4. Planning for communication 69

i. Expander port for cluster 2

7. E-mail configuration Attention: If you plan to connect your network to the ESSNet, IBM

recommends that you defer having IBM configure e-mail during initial installation and configuration. You can configure e-mail by using ESS Specialist after you connect your network to the ESSNet.

a. Maximum error notification count per problem

The ESS sends error notifications (0 to 9) to e-mail addresses and call home. Enter the total number of notifications you want sent to each recipient for each problem. A number greater than 1 increases opportunities for delivery.

Note: If you enter a value of 0, the ESS does not send an error

notification.

b. Add e-mail destinations

The ESS sends error notifications and information to the destinations you enter here if you have attached your LAN to the ESSNet external hub.

Note: IBM strongly recommends that you list at least one e-mail address.

This address will receive information when product engineers or service support personnel connect to your machine.

v Enter the full e-mail address for each destination, for example,

maria@host.com.

v For each recipient, check one box: Errors, information, all,ornone.

This specifies which notification the recipient receives.

c. Enable smart relay host

Note: You cannot enable smart relay host if you have enabled local e-mail

as the two configurations are mutually exclusive.

Select Yes to enable a smart relay host when you have met either of the following conditions:

v Your e-mail is sent from a UNIX-based system on which you have

specified a mail relay or mail gateway

v You have installed a message transfer agent (MTA) on your mail server If you selected Yes (one of the above conditions applies), enter a host

name or network address. If the above conditions do not apply, select No. Note: If the address you entered in step 7b does not receive e-mail,

configuring the smart relay host may correct the problem.

d. Enable local e-mail

Note: You cannot enable local e-mail if you have enabled smart relay host

as the two configurations are mutually exclusive.

Select Yes when: v You have connected your ESS to a host-system network that does not

have a domain name server (DNS)

8. SNMP configuration

70 ESS Introduction and Planning

| |

The ESS generates Simple Network Management Protocol (SNMP) traps and supports a read-only management information base (MIB) to allow monitoring by your network.

Note: SNMP is required for PPRC status reporting for ESS Copy Services for

Open Systems.

Attention: If you plan to connect your network to the ESSNet, IBM recommends that you defer having IBM configure SNMP during initial installation and configuration. You can configure SNMP by using ESS Specialist after you connect your network to the ESSNet.

a. Allow MIB access

The ESS provides access to a management information base (MIB). To allow read access to this information, check Read Only. To disallow or deny read access to this information, check None.

b. Allow generic traps

The ESS can generate generic SNMP traps. To allow the ESS to send these traps, check Yes; to not allow it to send these traps, check No.

c. Allow product-specific traps

The ESS can generate product-specific SNMP traps. To allow it to send these traps, check Yes. To not allow it to send these traps, check No.

d. Maximum trap notifications per problem

Enter the total number of trap notifications you want sent for each trap condition. To ensure that traps are not lost, you may want to send each trap notification more than once.

e. SNMP community name

Enter the SNMP community name (up to 31 characters) to use for authenticating requests. If you do not enter a name, this entry defaults to public access.

f. SNMP SysContact

This is an optional entry. If you like, enter the name of the person responsible for your machine who your service provider should contact.

g. SNMP SysLocation

This is an optional entry. If you like, enter the location of the machine.

h. Add SNMP trap destinations

Enter host names or dotted decimal addresses of the destinations that are to receive SNMP traps. For example: host.com, or 9.113.152.254.

9. Customer pager information This information is optional. The ESS can send problem record information to

your pager through the call-home modem. Enter the following information: a. Pager user name

Enter your pager user name in alphanumeric characters. This must be a unique name.

b. Modem telephone number

Enter the modem telephone number of the pager company. The pager must use TAP/IPO protocol. If the pager company recommends a slow speed or non-error correcting protocol, add an uppercase “z” (Z) to the end of the telephone number.

c. Pager PIN or ID number

Chapter 4. Planning for communication 71

This is the pager PIN number or ID number required by the pager company. It is usually not null.

d. Carrier password

This is a security password. Check with your pager company; this may be null.

e. Pager type

Select alphanumeric or numeric.

The numeric pager test message is: 01234-56789 The normal pager message is: 111-aaaaaa-222-bbbbbbb-333-c-444-ddd,

where:

aaaaaa is the numeric characters from the product-serial number bbbbbbb is the customer voice-telephone number c is the cluster number (1 or 2) ddd is the Problem ID

Note: The information the ESS can send to a numeric pager is limited.

f. Pager state

Check Yes to enable, or No to disable.

g. Number of repeats

This is the number of times the ESS sends problem record information (0 -

10). The ESS sends information once automatically.

10. Service information messages (SIMs) for S/390 The ESS sends SIMs to System/390 host consoles for the following three

types of SIMs: v Direct access storage device (DASD) SIM

This SIM tracks disk drive module (DDM) failures and problems.

v Media SIM

This SIM tracks data check problems on the media.

v Storage facility SIM

This SIM tracks control unit, power control, and other hardware problems.

You select the number of times that the ESS sends a SIM to your console. The ESScansendaSIM1-9times, or not at all (0). You also select the severity level of the SIMs. The ESS does not send any SIMs that are below the severity level that you select. Severity levels are:

1 acute An irrecoverable error with possible loss of data. This severity

2 serious An irrecoverable error or a data check with loss of access to

3 moderate A system path or paths are not operational, and performance

4 service A recoverable error, equipment checks, or data checks. You

Enter the severity levels for the SIMs and enter the number of times the ESS should send a SIM:

a. Enter the SIM-severity reporting level for DASD SIMs.

72 ESS Introduction and Planning

level only applies to DASD SIMs.

data.

may be degraded. This severity level does not apply to media SIMs.

can defer repair.

1to4

b. Enter the number of times the ESS is to send a DASD SIM.

0to9

c. Enter the SIM-severity reporting level for media (data check) SIMs.

2or4

d. Enter the number of times the ESS is to send a media SIM.

0to9

e. Enter the SIM-severity reporting level for a storage server SIM.

2, 3, or 4

f. Enter the number of times the ESS is to send the storage-server SIM.

0to9

11. Fibre-channel LUN-access control A switch on the ESS determines whether hosts have access to all LUNs over

fibre channel, or whether access is restricted. a. Switch setting:

Check Restricted if you want to limit access to LUNs to hosts that you define in the ESS Specialist interface. Restricted is the default setting.

Check Permit All if all hosts are to have access to all LUNs.

Communications for ESS Web Copy Services

This section gives guidelines for filling out the Copy Services work sheet. The ESS clusters that are part of a Copy Services Server Group use the TCP/IP

network to communicate. Each ESS cluster needs to have an IP address assigned to it. You enter this information on the Communication Resources (Copy Services) work sheet.

IBM recommends that you use a Domain Name Server (DNS) for name resolution. DNS provides the following advantages:

v It resolves the names of the participating ESS clusters v It allows the Copy Services code to communicate with remote sites v A domain name provides a unique, stable address for communication; the dotted

decimal address can be changed

Figure 11 on page 74 shows ESS Copy Services server group in a DNS configuration.

Chapter 4. Planning for communication 73

Site 1 Primary Site

ESS 1

Backup

Server Group 1

ESCON

Site 2 Recovery Site

ESS 4

Primary

H O S T

CLI

ESSnet

ESS 2

Backup

Server Group 2

ESCON

ESS 5

Primary

ESSnet

HUBHUB

CLI

CS000005

H O S T

Figure 11. ESS Web Copy Services configuration with DNS

If you decide not to use a DNS in your configuration, you need to provide your IBM SSR with information in addition to the information in the Communication Resources (Copy Services) work sheet. The SSR uses the ESS Service interface to update the host table with this information:

v The TCP/IP address and host name for each ESS cluster in the copy services

server group.

v The TCP/IP address and hostname for each host using the CLI. v The TCP/IP address and hostname of the ESSNet Workstation.

Use the following instructions when completing the Communication Resources (ESS Web Copy Services) work sheet in “Appendix B. Communication Resources (ESS Web Copy Services) work sheet” on page 89. Refer to the “Guidelines for enabling and using ESS Web Copy Services” on page 41 for additional information:

Attention: This work sheet must be copied and provided for each ESS Web copy services server group defined

1. Server Group : Identify the server group (_) that is being defined by this work sheet.

2. Primary Copy Services Server IP Address. For example, 9.113.152.148.

3. Backup Copy Services Server IP Address. For example, 9.113.152.147.

4. Is a Domain Name Server (DNS) configured on ESS. Note: If you do not have a DNS specified and you are using the CLI, collect the

5. Enable ESS Web Copy Services commands for System/390 volumes

74 ESS Introduction and Planning

hostnames and IP addresses for all of the Open System servers that are using the CLI.

Select Enable or Disable. (Disable is the default) ESS Copy Services supports FlashCopy and PPRC for System/390 volumes in addition to volumes on open system hosts.

Note: It is not necessary to enable ESS Web Copy Services if you are going to

use TSO and IDCAMS

6. ESS Machine Serial Number for Primary Server Site. Enter the serial number of this machine. For example, 013-FCA15. You can configure two ESS within a Copy Services Server group. Each ESS

Copy Services server group manages four clusters and a maximum of 2048 volumes. Provide this information to your IBM SSR for each Copy Services server group that you want to configure.

Note: A Copy Services server group is a collection of ESS clusters that

participate in Copy Services functions that include the volumes within the clusters.

a. Cluster 1 Hostname

Enter the hostname that you are assigning to cluster 1 for access over the network. For example, Storage03.company.com.

Note: The hostname you define here is the Web site address for access to

ESS Copy Services.

b. Cluster 1 IP Address

Enter the dotted decimal address you are assigning to cluster 1 of this machine. For example, 9.113.152.149.

c. Cluster 2 Hostname

Enter the hostname that you are assigning to cluster 2 for access over the network. For example, Storage04.company.com.

d. Cluster 2 IP Address

Enter the dotted decimal address you are assigning to cluster 2 of this machine. For example, 9.113.152.151 .

7. ESS Machine Serial Number for Backup Server Site. Enter the serial number of this machine. For example, 013-FCA15. a. Cluster 1 Hostname

Enter the hostname that you are assigning to cluster 1 for access over the network. For example, Storage03.company.com.

b. Cluster 1 IP Address

c. Cluster 2 Hostname

Enter the hostname that you are assigning to cluster 2 for access over the network. For example, Storage04.company.com.

d. Cluster 2 IP Address

Use the following instructions when completing the work sheet that is shown in Table 24 on page 89:

Note: The hostname you define here is the Web site address for access to

ESS Copy Services.

Enter the dotted decimal address you are assigning to cluster 1 of this machine. For example, 9.113.152.149.

Enter the dotted decimal address you are assigning to cluster 2 of this machine. For example, 9.113.152.151 .

Chapter 4. Planning for communication 75

1. Server Group : Identify the server group (_) that is being defined by this work sheet.

2. Command Line Interface Host 1 IP Address Enter the dotted decimal address you are assigning to Command Line Interface

Host 1. For example, 9.113.152.151 . Command Line Interface Host 1 Hostname Enter the hostname that you are assigning to Command Line Interface 1 for

access over the network. For example, Storage04.company.com.

3. Command Line Interface Host 2 IP Address Enter the dotted decimal address you are assigning to Command Line Interface

Host 1. For example, 9.113.152.153 . Command Line Interface Host 2 Hostname Enter the hostname that you are assigning to Command Line Interface 2 for

access over the network. For example, Storage01.company.com.

4. Command Line Interface Host 3 IP Address Enter the dotted decimal address you are assigning to Command Line Interface

Host 1. For example, 9.113.152.154 . Command Line Interface Host 3 Hostname Enter the hostname that you are assigning to Command Line Interface 3 for

access over the network. For example, Storage02.company.com.

5. Command Line Interface Host 4 IP Address Enter the dotted decimal address you are assigning to Command Line Interface

Host 1. For example, 9.113.152.155 . Command Line Interface Host 4 Hostname Enter the hostname that you are assigning to Command Line Interface 4 for

access over the network. For example, Storage03.company.com.

6. ESSNet workstation Internet address Enter the Internet address that you are assigning to ESSNet for access over the

network. For example, 555.555.555.0.ESSNet workstation hostname Enter the hostname that you are assigning to ESSNet for access over the

network. For example, ESSNet1.

Disaster Recovery Considerations for Copy Services

If a disaster or emergency situation at your primary production site causes you to lose connections to the Copy Services primary server, you must manually switch control to your recovery site. ESS Web Copy Services code copies tasks synchronously between the primary and backup servers, but there are some steps you should consider in planning for disaster recovery, and in implementing procedures following a disaster.

Preparing for a disaster

Planning for a disaster requires some additional steps for PPRC. First, decide where to place your primary and backup ESS Web Copy Services servers. There are two options:

1. Primary Copy Services server is at your recovery site Choosing this configuration can gain you some efficiency in terms of recovering

from a disaster. Because the primary server is at the recovery site, you do not have to perform manual recovery steps to switch to a different Web Copy

76 ESS Introduction and Planning

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