IBM eServer zSeries 990 Technical Guide

© Copyright IBM Corp. 2003, 2004. All rights reserved. ix

Preface

The IBM Eserver® zSeries® 990 scalable server provides major extensions to the existing

zSeries architecture and capabilities. The concept of Logical Channel Subsystems is added,

and the maximum number of Processor Units and logical partitions is increased. These

extensions provide the base for much larger zSeries servers.

This IBM® Redbook is intended for IBM systems engineers, consultants, and customers who

need to understand the zSeries 990 features, functions, availability, and services.

This publication is part of a series. For a complete understanding of the z990 scalable server

capabilities, also refer to our companion Redbooks™:

򐂰 IBM Eserver zSeries 990 Technical Introduction, SG24-6863

򐂰 IBM Eserver zSeries Connectivity Handbook, SG24-5444

Note that the information in this book includes features and functions announced on

April 7, 2004, and that certain functionality is not available until hardware Driver Level 55 is

installed on the z990 server.

The team that wrote this redbook

This redbook was produced by a team of specialists from around the world working at the

International Technical Support Organization, Poughkeepsie Center.

Bill White is a Project Leader and Senior Networking Specialist at the International

Technical Support Organization, Poughkeepsie Center.

Mario Almeida is a Certified Consulting IT Specialist in Brazil. He has 29 years of experience

in IBM Large Systems. His areas of expertise include zSeries and S/390® servers technical

support, large systems design, data center and backup site design and configuration, and

FICON® channels.

Dick Jorna is a Certified Senior Consulting IT Specialist in the Netherlands. He has 35 years

of experience in IBM Large Systems. During this time, he has worked in various roles within

IBM, and currently provides pre-sales technical support for the IBM ^ zSeries product

portfolio. In addition, he is a zSeries product manager, and is responsible for all zSeries

activities in his country.

Thanks to the following people for their contributions to this project:

Franck Injey

International Technical Support Organization, Poughkeepsie Center

Mike Scoba

zSeries Hardware Product Planning, IBM Poughkeepsie

First Edition authors

Franck Injey, Mario Almeida, Parwez Hamid, Brian Hatfield, Dick Jorna