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Nmi functionality, System board leds – HP ProLiant DL100 Series Server DL100 Series User Manual

Page 11

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NMI functionality

An NMI crash dump enables administrators to create crash dump files when a system is hung and is not

responding to traditional debug mechanisms.
Crash dump log analysis is an essential part of diagnosing reliability problems, such as hangs in
operating systems, device drivers, and applications. Many crashes freeze a system, and the only

available action for administrators is to cycle the system power. Resetting the system erases any

information that could support problem analysis, but the NMI feature preserves that information by

performing a memory dump before a hard reset.
To force the OS to invoke the NMI handler and generate a crash dump log, the administrator can do any
of the following:

Short the NMI jumper pins

Press the NMI switch

Use the Lights-Out 100 Virtual NMI feature

For additional information, see the whitepaper on the HP website

(http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00797875/c00797875.pdf).

System board LEDs

Item LED

description Status

1

Processor fan failure

Amber = Processor fan error
Off = Normal

2

DIMM failure

Amber = DIMM has failed or is missing.
Off = Normal

3

Overtemperature

Amber = System has reached a cautionary or

critical temperature level.
Off = Normal

Component identification 11