HP ProLiant SL270s Gen8 Server - Manual (Page 11)

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.