Installing and Managing HP-UX Virtual Partitions (includes A.04.02)

Monitor and Shell Commands
Resetting a Virtual Partition
Chapter 5
152
Resetting a Virtual Partition
Just as it is occasionally necessary to issue a hard reset (RS) or a soft reset (TOC) for a non-vPars OS
instance, it is occasionally necessary to issue similar resets for a vPars OS instance.
Hard Reset
On hard partition not running vPars, a hard reset cold boots the hard partition. To issue a hard reset, the
administrator types a CTRL-B at the console to connect to the service processor and then types the command
RS (reset), at which time the hard partition cold boots.
On a hard partition running vPars, a hard reset will reset the hard partition--including the Monitor and all
the virtual partitions.
To simulate a hard reset on only a virtual partition, from a running virtual partition, use vparreset with the
-h option. For example, if winona2 is hung, we can execute vparreset from the running partition winona1:
winona1# vparreset -p winona2 –h
The –h option also inhibits the autoboot behavior (just like shutdown -h does); therefore -h can be used to
break out of a reboot loop. Because -h overrides the autoboot setting for that virtual partition, the partition
must be manually restarted via vparboot (e.g., winona1# vparboot -p winona2).
Other virtual partitions are unaffected when one virtual partition is reset.
Soft Reset
On a hard partition not running vPars, a soft reset (TOC) allows HP-UX to attempt to capture a state and
potentially create a crash dump and then the hard partition reboots. To issue a soft reset, the administrator
types a CTRL-B at the console to connect to a service processor and then types the command TC (transfer of
control).
On a hard partition running vPars, a soft reset will take dumps of all the virtual partitions
1
as well as the
Monitor image, and then the hard partition reboots.
To simulate a soft reset on only one virtual partition, from a running partition, use vparreset with the -t (for
TOC) option. For example, if winona2 is hung, we can execute vparreset from the running partition
winona1:
winona1# vparreset -p winona2 -t
The target virtual partition either shuts down or reboots according to the setting of the autoboot attribute of
that virtual partition.
Other virtual partitions are unaffected when one virtual partition is reset.
NOTE Unlike the RS and TC commands, the vparreset command also displays Processor Information
Module (PIM) data unless the -q option is specified.
On Superdome, when there is a pending reboot for reconfiguration, the target virtual partition
will not be rebooted until all the virtual partitions within the nPartition are shut down and the
virtual partition Monitor is rebooted.
1. See note titled “Kernel Dumps” on page 233.