Component identification 80
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
Off
Off = Set default boot mode to UEFI.
On = Set default boot mode to legacy.
S8
—
Reserved
S9
—
Reserved
S10
—
Reserved
S11
—
Reserved
S12
—
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 CMOS.
CAUTION:
Clearing CMOS 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
HPE Dynamic Smart Array B140i Controller is disabled. Do not use the B140i controller when
the server is in Legacy BIOS Boot Mode.
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.