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
