HP-UX HB v13.00 Ch-17 - vPars

HP-UX Handbook – Rev 13.00 Page 42 (of 46)
Chapter 17 Virtual Partitions (vPars)
October 29, 2013
For more information see the document: http://docs.hp.com/en/1705/oc.pdf.
Crash Dump Handling on vPars Systems
If a vPar crashes and writes a dump, the crash handling is the same as on an nPar. The dump is
written to /var/adm/crash and can be analyzed using the same tools as on an nPar systems. The
only difference is a monitor (vpmon) crash.
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, is it occasionally necessary to issue similar resets for a vPars OS instance.
Hard Reset
A hard reset cold-boots a hard partition (not running vPars),. To issue a hard reset, the
administrator issues CTRL-B at the console to connect to the service processor and then types
the command RS (reset) and the hard partition reboots (cold).
A hard reset will reset the hard partition running vPars – including the monitor and all virtual
partitions.
Use vparreset -h from a running virtual partition to perform a reset on a vPar and to prevent it
from rebooting. For example, if vpar2 is hung, we can execute vparreset from running partition
vpar1:
vpar1# vparreset -p vpar2 –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., vpar1# vparboot -p
vPar2).
Other virtual partitions are unaffected by one virtual partition’s reset.
Soft Reset (TOC)
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 vPars System, a TOC from the MP/GSP will force all the virtual partitions to dump as well as
the Monitor image, and then the hard partition reboots.