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Connectors, LEDs, and Switches
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.
When an operating system crashes, system administrators can perform a non-maskable
interrupt (NMI) event by pressing a dump switch. The NMI event enables a hung system to
once again become responsive.
The NMI switch is used ONLY in the event of a service emergency that requires a complete
data dump in preparation for recovering the system from a catastrophic event.
System Configuration Settings
It may be necessary at some time to clear and reset system configuration settings. 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. For additional information
about locating the switch and switch settings, refer to "System Maintenance Switch" in this
chapter. The default setting for all positions is off.
IMPORTANT: Clearing CMOS and/or NVRAM deletes your configuration information. Refer to the
HP ProLiant ML570 Generation 2 Server Setup and Installation Guide for complete instructions on
configuring the server.
IMPORTANT: The server serial number must be re-entered through RBSU after clearing the NVRAM.
Refer to "Re-entering the Server Serial Number" in Chapter 2.
To erase all system configuration settings:
1. Power down the server.
2. Remove the access panel.
3. Set the position 6 lever to the On position.
4. Power up the server, and wait for the system to display a message confirming that the
maintenance switch has been set.
5. Power down the server.
6. Reset the position 6 lever to the default Off position.
7. Power up the server.
8. Press the F9 key to run RBSU and reset all system configuration settings.
For instructions on using RBSU to reset system configuration settings, refer to the HP
ProLiant ML570 Generation 2 Server Setup and Installation Guide.
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HP ProLiant ML570 Generation 2 Server Maintenance and Service Guide
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