NonStop NS-Series Operations Guide (H06.12+)

15 Starting and Stopping the System
• “When to Use This Section” (page 155)
• “Powering On a System ” (page 156)
— “Powering On the System From a Low Power State” (page 156)
— “Powering On the System From a No Power State” (page 156)
• “Starting a System” (page 158)
— “Loading the System” (page 158)
— “Starting Other System Components” (page 160)
— “Performing a System Load ” (page 161)
— “Performing a System Load From a Specific Processor” (page 162)
— “Reloading Processors” (page 163)
• “Minimizing the Frequency of Planned Outages” (page 164)
— “Anticipating and Planning for Change” (page 164)
• “Stopping Application, Devices, and Processes” (page 164)
• “Stopping the System” (page 166)
— “Alerts” (page 166)
— “Halting All Processors Using OSM” (page 166)
• “Powering Off a System” (page 166)
— “System Power-Off Using OSM” (page 166)
— “System Power-Off Using SCF” (page 167)
— “Emergency Power-Off Procedure” (page 167)
• “Troubleshooting and Recovery Operations ” (page 167)
— “Fans Are Not Turning” (page 167)
— “System Does Not Appear to Be Powered On” (page 167)
— “Green LED Is Not Lit After POSTs Finish” (page 168)
— “Amber LED on a Component Remains Lit After the POST Finishes” (page 168)
— “Components Fail When Testing the Power ” (page 168)
— “Recovering From a System Load Failure ” (page 168)
— “Getting a Corrupt System Configuration File Analyzed” (page 169)
— “Recovering From a Reload Failure ” (page 169)
— “Exiting the OSM Low-Level Link” (page 170)
— “Opening Startup Event Stream and Startup TACL Windows” (page 170)
• “Related Reading” (page 171)
When to Use This Section
Normally, you leave a system running. However, some procedures or recovery actions require
you to start the system (perform a system load) or stop or power off the system.
• Stop and then power off a system before:
— An extended planned power outage for your building or computer room.
— Performing some major maintenance or repair operations as noted in the documentation.
• Stop or restart a system (without powering off) when:
— Installing an updated RVU or some software product revisions (SPRs).
— Performing some recovery operations as noted in the documentation.
— Restarting the system after the entire system has been shut down with the operating
system images and files on disk still intact.
When to Use This Section 155