Preface

This document introduces the Sun Fire trademark E25K/E20K systems. It describes the cabinet, the system, the configuration, the dynamic system domain configurability, the system boards, and the reliability, availability, and serviceability features.

How This Book Is Organized

Chapter 1 describes the systems and boards, the maximum configurations, and the interconnect architecture.

Chapter 2 describes the configurability, inter-domain networking, domain protection, and domain fault isolation.

Chapter 3 defines system error protection, describes the redundant components and system recovery, discusses the system controller technology, and explains the concurrent serviceability features of the systems.

Chapter 4 describes the heart of the system, which is the Sun trademark Fireplane interconnect assembly.

Chapter 5 describes the components within the systems.

Glossary.

Table with descriptions and examples of the typographic conventions that are used in this book.

Application	Title
Site Planning	Sun Fire E25K/E20K Systems Site Planning Guide
Installation	Sun Fire E25K/E20K Systems Read Me First
Installation	Sun Fire E25K/E20K Systems Getting Started
Installation	Sun Fire E25K/E20K Systems Unpacking Guide
Installation	Sun Fire E25K/E20K Systems Hardware Installation and De-Installation Guide
Service	Sun Fire E25K/E20K Systems Service Manual
Service	Sun Fire E25K/E20K Systems Service Reference I-Nomenclature
Service	Sun Fire E25K/E20K Systems Service Reference II-Component Numbering

Accessing Sun Documentation

You can view, print, or purchase a broad selection of Sun documentation, including localized versions, at:

http://www.sun.com/documentation

Third-Party Web Sites

Sun is not responsible for the availability of third-party web sites mentioned in this document. Sun does not endorse and is not responsible or liable for any content, advertising, products, or other materrials that are available on or through such sites or resources. Sun will not be responsible or liable for any actual or alleged damage or loss caused by or in connection with the use of or reliance on any such content, goods, or services that are available on or through such sites or resources.

Contacting Sun Technical Support

If you have technical questions about this product that are not answered in this document, go to:

http://www.sun.com/service/contacting

Sun Welcomes Your Comments

Sun is interested in improving its documentation and welcomes your comments and suggestions. You can submit your comments by going to:

http://www.sun.com/hwdocs/feedback

Please include the title and part number of your document with your feedback:

Sun Fire E25K/E20K Systems Overview, part number 817-4136-11

United States Export Control Laws
Notice

Products covered by and information contained in this service manual are controlled by U.S. Export Control laws and might be subject to the export or import laws in other countries. Nuclear, missile, chemical biological weapons, or nuclear maritime end uses or end users, whether direct or indirect, are strictly prohibited. Export or re-export to countries subject to U.S. embargo or to entities identified on U.S. export exclusion lists, including but not limited to the denied persons and specially designated nationals lists, is strictly prohibited. Use of any spare or replacement CPUs is limited to repair or one-for-one replacement of CPUs in products exported in compliance with U.S. export laws. Use of CPUs as product upgrades unless authorized by the U.S. Government is strictly prohibited.