System Maintenance Switch; Nmi Jumper - HP ProLiant DL580 Gen8 Maintenance And Service Manual

System maintenance switch

The system maintenance switch (SW1) is a twelve-position switch that is used for system configuration. The
default position for all twelve positions is Off.
Switch
1
2
5
6
7*
3, 4, 8, 9, 10, 11,
12
* The default position for switch 7 is set in the factory shipping configuration. This switch setting determines the BIOS
mode the system defaults to when configuration memory is cleared to factory defaults. The User defined defaults setting
in UEFI System Utilities supersedes this switch.
IMPORTANT:
maintenance switch 7 to the same BIOS boot mode the server is deployed in. Otherwise, the
storage controller may not recognize the OS installed on the storage media.

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.
Settings
Off = iLO security enabled
On = iLO security disabled
Off = Normal operation
On = The BIOS configuration is locked.
Off = Normal operation
On = Password disabled
Off = Normal operation
On = Clear CMOS and RAM
Off = Set factory default boot mode to UEFI.
On = Set factory default boot mode to Legacy.
Reserved
To avoid a mismatch between boot modes, HP recommends setting system
Component identification 78