
Component identification 14
CAUTION: Clearing CMOS and/or NVRAM deletes configuration information. There is an
RBSU setting that erases default settings and fixed disk partitions, which causes a loss of data.
Diagnostic LEDs
Position Position Function
S7 S8 Diagnostic LEDs
Off Off Port 85
Off On Port 84
On Off iLO 3
NMI functionality
An NMI crash dump enables administrators to create crash dump files when a system is hung and 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
either of the following:
• Short the NMI jumper pins
• Use the iLO Virtual NMI feature
For more information, see the whitepaper on the HP website
(http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00797875/c00797875.pdf
).
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