HP-UX 11i Version 2 Installation and Update Guide, March 2004

Preparing to Migrate to HP-UX 11i v2
About Online Diagnostics
Chapter 4 77
About Online Diagnostics
HP-UX 11i v2 automatically installs diagnostics on all systems to
provide required hardware support. These tools, contained in the
OnlineDiag bundle, give you a complete solution to verify, troubleshoot,
and monitor Itanium-based system hardware, including CPUs, memory,
interface cards, mass storage and other devices.
IMPORTANT For the March 2004 release, two patches are included in the
HWEnable11i bundle on the OE media that are required for HP mx2 dual
processor module systems:
1. PHKL_30165 (diag2)
2. PHKL_30155 (machdep)
The HWEnable11i patch bundle must be installed on all HP mx2 dual
processor module systems. Failure to do so will result in system
instability. Both of these patches are kernel patches and require a
system reboot
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, we highly recommend
installing the OnlineDiag bundle with HP-UX 11i v2 (it will be 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.
• Provide EMS hardware monitors that notify you of hardware events
that may indicate impending hardware failure.