NonStop NS-Series Operations Guide (H06.03+)

Processors and Components: Monitoring and
Recovery
HP Integrity NonStop NS-Series Operations Guide—529869-001
9-9
Recovery Operations for Processors
Recovery Operations for Processors
The architecture of Integrity NonStop NS-series servers offers 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 (slices), 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 slice, then dump
that excluded PE before reintegrating the slice into the running processor.
Processor recovery operations for your NS-series system might include:
•
Recovery Operations for a Processor Halt on page 9-9
•
Halting One or More Processors on page 9-10
•
Reloading a Single Processor on a Running Server on page 9-10
•
Recovery Operations for a System Hang on page 9-14
•
Enabling/Disabling Processor and System Freeze on page 9-15
•
Freezing the System and Freeze-Enabled Processors on page 9-15
•
Dumping a Processor to Disk on page 9-15
•
Backing Up a Processor Dump to Tape on page 9-19
•
Replacing Processor Memory on page 9-19
•
Replacing the Processor Board and Processor Entity on page 9-19
•
Submitting Information to Your Service Provider on page 9-19
Recovery Operations for a Processor Halt
HP Tandem Failure Data System (TFDS) should be used to proactively monitor
processors and manage processor halts. Configured and running before a halt occurs,
TFDS can help determine and perform the type of recovery operation needed (see
Monitoring Processors Automatically Using TFDS
on page 9-4). For information on
configuring and using TFDS, see the Tandem Failure Data System (TFDS) Manual.
If all processors have halted (the system is down), TFDS cannot perform an automatic
dump or reload. You must load the system, as described in Performing a System Load
From a Specific Processor on page 15-11. You can omit one slice from the load
operation, to dump after the system is running. You can also dump the remaining
processors as needed—dump the entire processor before reloading, or reload and
omit slice to dump later. For more information, see Dumping a Processor to Disk on
page 9-15.
The best manual recovery operation for your processor halt scenario depends on the
type of halt. You should record the halt information (as described in Identifying