Technical data

Procedures for Booting and Resetting nPartitions
Configuring Automatic System Restart for a nPartition
HP System Partitions Guide: Administration for nPartitions—rp7410
EMSP—[e-mail]
187
Configuring Automatic System Restart
for a nPartition
The automatic system restart feature on nPartition servers enables
you to configure an nPartition to be automatically rebooted when HP-UX
hangs on the partition.
By default automatic system restart is disabled for nPartitions.
To enable or disable automatic system restart use the service processor
Command menu’s AR command, as described in Service Processor (GSP
or MP) on page 188.
To use the AR command you must log in to the server complex’s service
processor using an account that has administrator authority.
CAUTION When automatic system restart is enabled for an nPartition, all cells in
the partition automatically will be reset—and the partition will
reboot—if HP-UX running on the partition is hung for three (3) minutes.
When HP-UX is booted on an nPartition, it indicates that it is “alive” by
emitting a HEARTBEAT chassis code and an
ACTIVITY_LEVEL_TIMEOUT chassis code approximately every four
seconds.
The service processor manages automatic system restart for each
partition through a timer that tracks the time since the partition was
active. This timer is reset every time an ACTIVITY_LEVEL_TIMEOUT
chassis code is emitted by HP-UX on the partition. If HP-UX does not
emit this chassis code for three minutes then it emits an “Alert Level 13:
System hang detected” chassis code. If the partition has automatic
system restart enabled then the service processor issues a
PARTITION_TIMEOUT_RESET chassis code, resets all cells assigned to
the partition, and the partition reboots.
HP Restricted / DRAFT
DRAFT NOV 2001