®
SG24-6947-01 ISBN 0738497657
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IBM zSeries 990
Technical Guide
Structure and design -
A scalable server for
an on demand world
Processor Unit,
memory, multiple
Logical Channel
Subsystems
Capacity upgrade
options
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.
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