Connectors, LED Indicators, Switches, and Jumpers
4-19
SCSI Interlock Disable Switch
The SCSI interlock disable switch (Figure 4-13) is a two-position switch that enables the system
to boot during troubleshooting procedures when the Smart Array 5i Controller is not installed on
the system board. The default setting requires the system to halt during boot if the controller is
not installed.
Table 4-11 shows the switch settings and positions.
Table 4-11
SCSI Interlock Disable Switch
Position
Description
On/Off Function
1
SCSI interlock disable
Off = Interlock failure applies to both the PCI riser and the Smart
Array 5i Controller.
On = Interlock failure applies only to the PCI riser.
2
Reserved
—
NMI Switch
Crash dump analysis is an essential part of eliminating reliability problems such as hangs or
crashes in operating systems, device drivers, and applications. Crashes can freeze a system,
requiring you to do a hard reset. Resetting the system erases any information that supports root
cause analysis.
Systems running Microsoft Windows NT experience a blue screen trap when the operating
system crashes. When this happens, Microsoft recommends that system administrators perform
a NMI event by pressing a dump switch. The NMI event allows a hung system to become
responsive.
The ProLiant DL380 Generation 2 server is equipped with an NMI switch that, when pushed,
performs a memory dump before performing a hard reset (Figure 4-13).
