The Sun Ultra 20 M2 Workstation Service Manual provides a detailed description of the hardware and software applications used to support the Sun Ultra 20 M2 Workstation. This book is intended for system administrators, network administrators, or service technicians who have knowledge of workstation hardware and software.

How this Document is Organized

Chapter 1 provides an overview of the Sun Ultra 20 M2 Workstation.

Chapter 2 describes how to connect external cables and power on or off the workstation.

Chapter 3 provides visual inspection and troubleshooting procedures.

Chapter 4 describes how to run diagnostics and remove or replace the diagnostic partition.

Chapter 5 describes how to remove and replace components.

Appendix A contains information on system specifications.

Appendix B contains information on BIOS POST codes.

Shell Prompts



C shell


C shell superuser


Bourne shell and Korn shell


Bourne shell and Korn shell superuser


Typographic Conventions





The names of commands, files, and directories; on-screen computer output

Edit your.login file.

Use ls -a to list all files.

% You have mail.


What you type, when contrasted with on-screen computer output

% su



Book titles, new words or terms, words to be emphasized. Replace command-line variables with real names or values.

Read Chapter 6 in the User's Guide.

These are called class options.

You must be superuser to do this.

To delete a file, type rm filename.

Related Documentation

The document set for the Sun Ultra 20 M2 Workstation is described in the Where To Find Sun Ultra 20 M2 Workstation Documentation sheet that is packed with your system. All documents are posted at the product's documentation site; see the following URL:

Translated versions of some of these documents are available at the product's documentation site in Simplified Chinese, Traditional Chinese, French, German, Italian, Japanese, Korean, and Spanish.

English documentation is revised more frequently and might be more up-to-date than the translated documentation.

Documentation, Warranty, Support, and Training URLs

Sun Function



Hardware Documentation

Sun hardware documentation

Software Documentation

Solaris OS and other software documentation


View specific details regarding your warranty


Obtain technical support, including patches


Learn about Sun courses and educational offerings

Ordering Components

You can order additional components and replacement parts for the Sun Ultra 20 M2 Workstation. Contact your local Sun sales representative for more information. For the most up-to-date component information, see the Sun Ultra 20 M2 Workstation components list at:

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 materials 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.

Safety Information

Read the following documents for safety information:

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:

Please include the title and part number of your document with your feedback: Sun Ultra 20 M2 Workstation Service Manual, 819-6584-11.

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