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System maintenance switch descriptions
Position
1
S1
S2
S3
S4
1
S5
1, 2
S6
S7
S8
S9
S10
S11
S12
1
You can access the redundant ROM by setting S1, S5, and S6 to On.
2
When the system maintenance switch position 6 is set to the On position, the system is prepared to restore
all configuration settings to their manufacturing defaults.
When the system maintenance switch position 6 is set to the On position and Secure Boot is enabled, some
configurations cannot be restored. For more information, see Secure Boot configuration.
NMI functionality
An NMI crash dump enables administrators to create crash dump files when a system is hung and not
responding to traditional debugging methods.
An analysis of the crash dump log is an essential part of diagnosing reliability problems, such as hanging
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 use the iLO
Virtual NMI feature.
For more information, see the Hewlett Packard Enterprise website.
90
System maintenance switch descriptions
Default
Off
—
Off
Off
Off
Off
—
—
—
—
—
—
Function
Off = iLO security is enabled.
On = iLO security is disabled.
Reserved
Reserved
Reserved
Off = Power-on password is
enabled.
On = Power-on password is
disabled.
Off = No function
On = Restore default
manufacturing settings
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
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