Installation guide

LED Indicators and Switches E-17
Compaq Confidential – Need to Know Required
Writer: CDresden Project: Compaq ProLiant ML370 Generation 2 Server Setup and Installation Guide Comments: Graphics Replaced Checked by
Devin
Part Number: 203510-001 File Name: p-appe LED Indicators and Switches-J.doc Last Saved On: 7/12/01 11:30 AM
System Identification Switch
The system identification switch (SW2) is a three-position switch that
identifies the operational configuration of the server. This switch is set to the
correct configuration for your server by default. The following table shows the
switch settings and positions.
CAUTION: Do not alter the default setting for your server. Doing so causes
improper server operation.
Table E-11
System Identification Switch (SW2)
Position Description On/Off Function
1 ID0 Off
2 ID1 Off
3 ID2 Off
Non-Maskable Interrupt Switch
Crash dump analysis is an essential part of eliminating reliability problems
such as hangs or crashes in operating systems, device drivers, and applications.
Many crashes freeze a system requiring you to do a hard reset. Resetting the
system erases any information that supports root cause analysis.
Systems running a Microsoft Windows NT operating system experience a blue
screen trap when the operating system crashes. When this happens, Microsoft
recommends that system administrators perform a non-maskable interrupt
(NMI) event by pressing a dump switch. The NMI event allows a hung system
to once again become responsive.
The NMI switch, or SW4, is used ONLY in the event of a service emergency
that requires a complete data dump in preparation for recovering the system
from a blue screen or other catastrophic event.