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Starting and Stopping the System
Emergency Power-Off Procedure
If possible, HP recommends that the system be in a low power state before you
remove power to the system. However, in emergency situations, you might need to
quickly remove AC power from a system. Sites equipped with an emergency power-off
(EPO) switch can use it to remove AC power from your entire system. For more
information on the EPO system, see the NonStop NS-Series Planning Guide.
For sites that are not equipped with an EPO switch, switch off the circuit breakers to
the power cords connected to the cabinets and peripherals. For more information, refer
to
Section 14, Power Failures: Preparation and
Troubleshooting and Recovery Operations
Refer to the appropriate subsection for recovery information:
Recovering From a System Load Failure
Getting a Corrupt System Configuration File Analyzed
Recovering From a Reload Failure
Exiting the OSM Low-Level Link
Opening Startup Event Stream and Startup TACL Windows
If any of these problems occur when you power on a system, see the appropriate
subsection for recovery information:
Fans Are Not Turning
System Does Not Appear to Be Powered On
Green LED Is Not Lit After POSTs Finish
Amber LED on a Component Remains Lit After the POST Finishes
Components Fail When Testing the Power
Fans Are Not Turning
If the fans do not start turning a few seconds after you power on the server, check that
the AC power cords and component power cords are properly connected.
If the green LED lights are lit, but the fans are not turning, you must power off the
system immediately. See in
service provider.
HP Integrity NonStop NS-Series Operations Guide —529869-005
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Powering Off a System
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Emergency Power-Off Procedure
Recovery.
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on page 15-17. Contact your
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