System maintenance switch descriptions
Position Default Function
S1
1
O
O = iLO security is enabled.
On = iLO security is disabled.
S2 O Reserved
S3 O Reserved
S4 O Reserved
S5
1
O
O = Power-on password is enabled.
On = Power-on password is disabled.
S6
1,
2,
3
O
O = No function
On = Restore default manufacturing settings
S7 O Reserved
S8 — Reserved
S9 — Reserved
S10 — Reserved
S11 — Reserved
S12 — Reserved
1
To access the redundant ROM, set 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.
3
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.
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 initiate the NMI handler and generate a crash dump log, the administrator can use the iLO Generate
NMI feature.
DIMM slot locations
DIMM slots are numbered sequentially (1 through 12) for each processor.
Component identification
19
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