System maintenance switch, Nmi header – HP ProLiant DL320e Gen8 Server User Manual
Page 11
Component identification 11
Slot number
Type
Length
Height
Connector link width Negotiable link width
1
PCIe2
Half
Half
x8
x4
2
PCIe3
Half
Full
x16
x16
System maintenance switch
Switch
Default
Function
1
Off
Off = No function
On = iLO security is disabled
2
Off
Off = System configuration can be
changed
On = System configuration is locked
5
Off
Off = Power-on password is enabled
On = Power-on password is disabled
6
Off
Off = No function
On = ROM reads configuration as
invalid
3, 4, 7, 8, 9,
10, 11, 12
—
Reserved
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 header
The NMI header enables administrators to perform a memory dump before performing a hard reset. Crash
dump analysis is an essential part of eliminating potential reliability issues, such as hangs or crashes in
operating systems, device drivers, and applications. Many crashes can freeze a system, requiring you to
perform a hard reset. Resetting the system erases any information that supports 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.
For additional information, see the HP website