Component identification 17
Item Description
X
System maintenance switch
System maintenance switch
Position Default Function
S1
Off Off = HP iLO security is enabled.
On = HP iLO security is disabled.
S2
Off Off = System configuration can be
changed.
On = System configuration is locked.
S3
Off Reserved
Off Reserved
S5
Off Off = Power-on password is enabled.
On = Power-on password is disabled.
S6
Off Off = No function
On = ROM reads system configuration
as invalid.
S7
— Off = Set default boot mode to UEFI.
On = Set default boot mode to legacy.
S8
— Reserved
S9
— Reserved
S10
— Reserved
S11
— Reserved
— Reserved
To access the redundant ROM, set S1, S5, and S6 to on.
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.
IMPORTANT: Before using the S7 switch to change to Legacy BIOS Boot Mode, be sure the HP
Dynamic Smart Array B140i Controller is disabled. Do not use the B140i controller when the
server is in Legacy BIOS Boot Mode.
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.
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