HP-UX 11i v2 Installation and Update Guide, December 2005

Choosing an Installation Method
Online Diagnostics
Chapter 364
Online Diagnostics
Online Diagnostics are installed with HP-UX 11i v2 to support
hardware. The tools, contained in the OnlineDiag bundle, give you a
complete solution to verify, troubleshoot, and monitor PA-RISC and
Itanium-based system hardware, including CPUs, memory, interface
cards, and mass storage and other devices.
CAUTION Uninstalling the OnlineDiag bundle prevents products with dependencies
on the diagnostics from functioning correctly.
Not installing OnlineDiag removes protections against hardware
failures that diagnostics provide. Without the tools, it is much harder to
troubleshoot and fix problems if a hardware failure occurs.
To ensure the reliability of your computer system, HP highly
recommends installing the OnlineDiag bundle with HP-UX 11i v2. With
a media install, the OnlineDiag bundle is installed by default with any
HP-UX 11i Operating Environment.
The tools in OnlineDiag:
• Protect you against some hardware failures, for example, some
memory problems.
• Include EMS Hardware Monitors that notify you of hardware events
that may indicate impending hardware failure.
• Maintain logs that can give you critical help in determining the
cause of failures.
• Enable you to troubleshoot system problems with the system online
or offline.
For most computer systems, no special configuration of the diagnostics is
necessary.
For complete information, go to the Diagnostics Web site:
http://docs.hp.com/hpux/diag