Problem Determination Tips; Notices - IBM 21Y Maintenance Manual

Problem determination tips

Due to the variety of hardware and software combinations
that can be encountered, use the following information to
assist you in problem determination. If possible, have this
information available when requesting assistance from Ser-
vice Support and Engineering functions.
• Machine type and model
• Processor or hard disk upgrades
• Failure symptom
— Do diagnostics fail?
— What, when, where, single, or multiple systems?
— Is the failure repeatable?
— Has this configuration ever worked?
— If it has been working, what changes were made
prior to it failing?
— Is this the original reported failure?
• Reference/Diagnostics version
— Type and version level
• Hardware configuration
— Print (print screen) configuration currently in use
— BIOS level
• Operating system software
— Type and version level
Note: To eliminate confusion, identical systems are consid-
ered identical only if they:
1. Are the exact machine type and models
2. Have the same BIOS level
3. Have the same adapters/attachments in the
4. Have the same address jumpers/termina-
5. Have the same software versions and levels
6. Have the same Reference/Diagnostics Diskette
7. Have the same configuration options set in the
8. Have the same setup for the operation system
Comparing the configuration and software set-up
between "working and non-working" systems will
often lead to problem resolution.

Notices

References in this publication to IBM products, programs, or
services do not imply that IBM intends to make these avail-
able in all countries in which IBM operates. Any reference to
an IBM product, program, or service is not intended to state
or imply that only that IBM product, program, or service may
be used. Subject to IBM's valid intellectual property or other
196
Netfinity 3500-M20 – Type 8657 Models 21Y, 22Y, 31Y, 32Y,
same locations
tors/cabling
(version)
system
control files