HP-UX System Administrator's Guide: Configuration Management

Integrity
To boot a saved configuration on an Integrity system, interrupt the automatic boot
process when it reaches the point that it has started the HP-UX boot loader. (On most
systems, this is during the second 10-second countdown.) At the HPUX> prompt, type
HPUX>boot thursday
HP 9000
To boot a saved configuration on an HP 9000 system, interrupt the automatic boot
process when you arrive at the boot console handler. Tell it to boot from the desired
device (typically with a boot pri command). When it asks if you want to interact
with the ISL or IPL, say Yes. (The exact mechanism to get to this point varies; consult
your system’s hardware document or the hpux(1M) manpage for details.) At the ISL>
prompt, type
ISL>hpux thursday/vmunix
In either case, this will boot the saved configuration named thursday. When the boot
is complete, it will be the currently running configuration; the previous configuration
is lost (unless it was automatically saved as backup).
Booting in Fail-Safe Mode
The other alternative for recovering from an unbootable configuration is to boot in
fail-safe mode. When you boot the system in fail-safe mode, your configuration settings
are ignored. All kernel tunables are given fail-safe values and no kernel modules are
dynamically loaded during boot. This method is particularly useful when a hardware
change or failure has caused all of your saved configurations to be unbootable.
Integrity
To boot an Integrity system in fail-safe mode, get to the HPUX> prompt as described in
“Booting a Saved Configuration” (page 198) and enter:
HPUX>boot –tm
HP 9000
To boot an HP 9000 system in fail-safe mode, get to the ISL> prompt as described in
“Booting a Saved Configuration” (page 198) and enter:
ISL>hpux –tm
Some HP 9000 systems that have been updated from earlier versions of HP-UX have
boot loaders that do not support the -tm option. On those systems, enter the following
instead:
ISL>hpux –f0x40000
(The two methods can be combined, if you want to boot a saved configuration in fail-safe
mode. This uses the kernel executable built for the saved configuration, including all
of its static modules, but none of its dynamically loaded modules.)
Recovering from Errors 199