Problem Determination and Service Guide - Public Support Login ...

Diagnostics
If you suspect a networking problem and the server passes all the system tests, suspect a
network cabling problem that is external to the server.
Problem determination tips
Because of the variety of hardware and software combinations that you can encounter,
use the following information to assist you in problem determination. If possible, have this
information available when you request assistance from Unisys.
• Machine type and model
• Microprocessor and hard disk drive upgrades
• Failure symptoms
- Does the server fail the Dynamic System Analysis diagnostic tests?
- What occurs? When? Where?
- Does the failure occur on a single server or on multiple servers?
- Is the failure repeatable?
- Has this configuration ever worked?
- What changes, if any, were made before the configuration failed?
- Is this the original reported failure?
• Diagnostic program type and version level
• Hardware configuration (print screen of the system summary)
• Server firmware level
• Operating-system type and version level
You can solve some problems by comparing the configuration and software setups
between working and nonworking servers. When you compare servers to each other for
diagnostic purposes, consider them identical only if all the following factors are exactly the
same in all the servers:
• Machine type and model
• Server firmware level
• Adapters and attachments, in the same locations
• Address jumpers, terminators, and cabling
• Software versions and levels
• Diagnostic program type and version level
• Configuration option settings
• Operating-system control-file setup
See Appendix A, Services and Support, for information about calling Unisys for service.
4–168 3850 7281–000