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Component identification 15
Position Description Function
S2
Configuration
lock
Off = System configuration can be
changed.
On = System configuration is
locked.
S3
Rack/Tower ID
Off = Tower
On = Rack
S4
Reserved Reserved
S5
Password
protection
override
Off = No function
On = Clears power-on password
and administrator password
S6
Invalidate
configuration
Off = Normal
On = ROM treats the system
configuration as invalid.
S7
Reserved Reserved
S8
Reserved Reserved
S9
Reserved Reserved
S10
Reserved Reserved
When the system maintenance switch position 6 is set to the On position, the system is prepared to erase all
system configuration settings from both CMOS and NVRAM.
CAUTION: Clearing CMOS and/or NVRAM deletes configuration information. Be sure to
properly configure the server or data loss could occur.
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 any of
the following:
• Short the NMI jumper pins
• Press the NMI switch
• Use the iLO 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).