HP ProLiant SL270s HP ProLiant SL270s Gen8 Server User Guide - Page 11

System maintenance switch, NMI jumper, Position, Default, Function

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System maintenance switch Position S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 Default Off Off Off Off Off Off - - - - - - Function Off = iLO 4 security is enabled. On = iLO 4 security is disabled. Off = System configuration can be changed. On = System configuration is locked. Reserved Reserved Off = Power-on password is enabled. On = Power-on password is disabled. Off = No function On = ROM reads system configuration as invalid. Reserved Reserved Reserved Reserved Reserved Reserved To access 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. NMI jumper The NMI jumper allows administrators to perform a memory dump before performing a hard reset. Crash dump analysis is an essential part of eliminating reliability problems, such as hangs or crashes in OSs, device drivers, and applications. Many crashes can freeze a system, requiring you to do a hard reset. Resetting the system erases any information that would support root cause analysis. Systems running Microsoft® Windows® experience a blue-screen trap when the OS crashes. When this happens, Microsoft® recommends that system administrators perform an NMI event by temporarily shorting the NMI header with a jumper. The NMI event enables a hung system to become responsive again. Component identification 11

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Component identification 11
System maintenance switch
Position
Default
Function
S1
Off
Off = iLO 4 security is enabled.
On = iLO 4 security is disabled.
S2
Off
Off = System configuration can be
changed.
On = System configuration is locked.
S3
Off
Reserved
S4
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
—
Reserved
S8
—
Reserved
S9
—
Reserved
S10
—
Reserved
S11
—
Reserved
S12
—
Reserved
To access 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.
NMI jumper
The NMI jumper allows administrators to perform a memory dump before performing a hard reset. Crash
dump analysis is an essential part of eliminating reliability problems, such as hangs or crashes in OSs, device
drivers, and applications. Many crashes can freeze a system, requiring you to do a hard reset. Resetting the
system erases any information that would support root cause analysis.
Systems running Microsoft® Windows® experience a blue-screen trap when the OS crashes. When this
happens, Microsoft® recommends that system administrators perform an NMI event by temporarily shorting
the NMI header with a jumper. The NMI event enables a hung system to become responsive again.