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Connectors, LEDs, and Switches
NMI Switch
Crash dump analysis is an essential part of eliminating reliability problems such as hangs or
crashes in operating systems, device drivers, and applications. Crashes can freeze a system,
requiring you to do a hard reset. Resetting the system erases any information that supports
root cause analysis.
Systems running Microsoft Windows 2000 experience a blue-screen trap when the
operating system crashes. When this happens, Microsoft recommends that system
administrators perform an NMI event by pressing a dump switch. The NMI event allows a
hung system to become responsive.
The ProLiant BL20p G3 server blade is equipped with an NMI switch that, when pushed,
performs a memory dump before performing a hard reset. The NMI switch is for use by
trained service personnel only.
System Maintenance Switch Procedures
When you perform troubleshooting steps, this guide may instruct you to perform the
following procedures:
•
Clear the system configuration.
•
Access the redundant ROM.
To complete these procedures, you must change physical settings on the system maintenance
switch (SW2).
Clearing the System Configuration
To clear the system configuration:
1. Power down the server blade:
— Press the power button on the front of the server blade.
— Use the virtual power button feature in the iLO remote console.
2. Disconnect the server blade from all power sources:
— Remove the server blade from the enclosure and set it on a flat, level surface.
— Disconnect the server blade from the diagnostic station.
3. Remove the access panel. Refer to the "Access Panel" section in Chapter 2, "Removal
and Replacement Procedures."
4. Change position 6 of SW2 to on.
5. Install the access panel. Refer to the "Access Panel" section in Chapter 2, "Removal and
Replacement Procedures."
6. Connect the server blade to system power:
— Install the server blade in the enclosure.
— Connect the server blade to the diagnostic station.
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HP ProLiant BL20p Generation 3 Server Blade Maintenance and Service Guide
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