HP NonStop NS manual Troubleshooting and Recovery Operations, Emergency Power-Off Procedure

Starting and Stopping the System Emergency Power-Off Procedure

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 Recovery.

Troubleshooting and Recovery Operations

Refer to the appropriate subsection for recovery information:

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Recovering From a System Load Failure on page 15-20

Getting a Corrupt System Configuration File Analyzed on page 15-21

Recovering From a Reload Failure on page 15-21

Exiting the OSM Low-Level Link on page 15-22

Opening Startup Event Stream and Startup TACL Windows on page 15-22

If any of these problems occur when you power on a system, see the appropriate subsection for recovery information:

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Fans Are Not Turning on page 15-18

System Does Not Appear to Be Powered On on page 15-19

Green LED Is Not Lit After POSTs Finish on page 15-19

Amber LED on a Component Remains Lit After the POST Finishes on page 15-19

Components Fail When Testing the Power on page 15-19

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 Powering Off a System on page 15-17.Contact your service provider.

HP Integrity NonStop NS-Series Operations Guide—529869-005

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