HP NonStop NS manual Processor Halts, OSM Alarms and Attribute Values, Halt code = %nnnnnn

Processors and Components: Monitoring and	Processor Halts
Recovery

Processor Halts

When certain errors occur (such as when data integrity is at risk), the operating system cannot correct the problem and must halt all application and system processes running in the associated processor. The remaining running processors in the system each send a message, reporting the halted processor as down. The other processors in the system, including the backup to the halted processor, are not affected by the errors that caused the processor to halt unless they are freeze-enabled. Two types of processor halts display a processor halt code in the Processor Status dialog box:

•A halt instruction results in a processor halt.

When the operating system detects a millicode or software error that it cannot correct, it can execute a halt instruction to suspend all application and system processes running in the associated processor. The status of the halted processor becomes:

Halt code = %nnnnnn

Unlike a freeze instruction, a halt instruction affects only one processor.

•A processor can be halted by a freeze instruction.

A freeze-enabled processor can be frozen by another frozen processor. When a freeze instruction is executed, any processors that are freeze-enabled also freeze immediately. When the operating system detects a software error that it cannot correct, it can execute a freeze instruction to suspend all application and system processes running in the associated processor. The status of the frozen processor becomes:

Freeze code = %nnnnnn

If system freeze is enabled, the status for all other freeze-enabled processors becomes:

Frozen by other processor

The Processor Halt Codes Manual documents processor halt codes.

Note. Do not freeze-enable a processor unless instructed to do so by your service provider.

OSM Alarms and Attribute Values

When the OSM Service Connection displays processor-related alarms or problem attributes, the alarm and attribute details often indicate the appropriate recovery action. Recovery actions might call for:

•

•

Trying the Recovery Operations for Processors on page 9-9.

Contacting your service provider.

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

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