NonStop Operations Guide for H-Series and J-Series RVUs

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” (page 129).
• Contacting your service provider.
Recovery Operations for Processors
NOTE: All references to processor elements (PEs) and the RELOAD command OMITSLICE parameter
apply only to NonStop NS16000 series and NS14000 series systems. For more information on
NonStop BladeSystems, NonStop NS2400 series, NS2300, NS2200 series, NS2100 and NS2000
series, NS1200, and NS1000 systems, see “Differences Between NonStop NS-Series Systems”
(page 36) and the appropriate planning guide.
NonStop NS16000 series and NS14000 series systems offer recovery options not available in
NonStop S-series. Because a logical processor has a physical processor element (PE) in each of
up to three NonStop Blade Elements, in some cases, you no longer have to choose between taking
the time to dump entire processors and skipping the dump to reload the system as quickly as
possible. In those cases, you can reload a halted processor immediately, while excluding the PE
for one Blade Element, then dump that excluded PE before reintegrating the Blade Element into
the running processor.
Processor recovery operations for your system might include:
• “Recovery Operations for a Processor Halt” (page 130)
• “Halting One or More Processors” (page 130)
Recovery Operations for Processors 129