First of all, you must learn what is and how to use BOOT_ADMIN on your
PA-RISC box, before thinking about doing anything with it.
BOOT_ADMIN is a firmware application,
used to manage a PA-RISC machine at an early boot stage,
i.e. when the box has not yet started its
Operating System. It is also known as the
Boot Console Handler (BCH). Those familiar with the x86 world
will probably see it as a kind of BIOS,
whilst PPC fans might think of it as an equivalent for
We named it BOOT_ADMIN
throughout this document since it is the name it is the most common prompt it
will display on
most PA-RISC machines. You will see through this HOWTO that there
are many references to it, therefore it's worth
saying that minimalistic BOOT_ADMIN skills are mandatory!
2.1.1. Entering the BOOT_ADMIN interface
Entering the BOOT_ADMIN management tool isn't that awful:
Turn your PA-RISC box on.
During the boot process, the following message will appear
on the current console (see Section 2.2):
Searching for Potential Boot Devices.
To terminate search, press and hold the ESCAPE key.
When this message is displayed, press and hold the Esc key
until an option menu appears. This can take a while, be patient. On recent
machines, pressing any key interrupts the boot process as well.
By default, you should enter the BOOT_ADMIN console.
Though on some 715s and 725s, an option menu looking like this may be shown:
b) Boot from specified device
s) Search for bootable devices
a) Enter Boot Administration mode
x) Exit and continue boot sequence
Select from menu:
Type 'a' and hit Enter to enter
Boot Administration mode. This will bring up a
Once you have the 'BOOT_ADMIN>'
prompt, you can pat yourself on the back: you are in BOOT_ADMIN mode!
As it has been said before, the prompt can differ between machines. On recent ones,
for instance, it looks like that:
Main Menu: Enter command or menu >
2.1.2. BOOT_ADMIN commands
BOOT_ADMIN is an early boot subsystem (a Boot Console Handler, as said before)
where you can execute a limited set of commands. You should find here everything
you need to know about them.
All HP-PA systems have a BCH. The display can be different but the idea remains the same.
That's why the following list is not complete but consistent enough.
Another important thing is that for each command, you have a shorter way
to invoke it. You can see the shortcut shown as uppercase letters in
the command name. Full names will be used in this section.
Be cautious when dealing with the BCH, you can harm your system.
Some commands may appear in several different menus, and all commands listed
here may not necessarily be available on your particular system, this is normal.
18.104.22.168. The main commands
These commands are the basic ones.
boot may be followed by an argument
which indicates the path you want to boot. The path should be
the definition of a device like for example
PRI if you have set this
variable correctly. Usually defaults to PRI.
path displays or sets the current paths.
Invoked with only one argument it will display the current path of the
entity passed as argument: path alt will display the
current alternative boot path. path pri fwscsi.6.0 will
setup the primary boot path as the device attached to Fast and Wide SCSI
controller with ID 6 and LUN 0. You can also set and display the paths
of console (graphics/serial) and keyboard (ps2/hil/usb).
search is a very useful command.
It automagically checks all possible boot devices and displays
these bootable paths. In several firmware versions, it links them
to a shortcut (like P0). It can even search
the LAN, if the box is able to boot it. Some firmware revisions allow you
to restrain the search path like: search lan or
display redisplays the current menu.
help gives you an overview of the
available commands and their action. help name will give you details on command name.
By default, you can list all main commands by
typing help main.
main will bring you back to the
main menu, whatever menu you might be currently
On almost every systems, there is a
reset instruction. It restarts the machine with
the latest parameters you have set.
22.214.171.124. The configuration commands
These commands are available in the
configuration menu. So, in order to use
them, you must enter this menu by typing configuration
at the 'BOOT_ADMIN>' prompt.
auto will tell you if the box will automatically
start booting when switched on, or will do a search for boot devices, depending
on the first argument passed to the command (boot,
search, start). You can modify this
parameter with the keywords ON and OFF.
default sets back the factory defaults.
monitor (only in graphic
console) sets your display configuration by typing monitor
which indicates your console path and type. You can list the available modes by typing
fastboot displays or sets the boot tests execution.
126.96.36.199. The information commands
They give you access to global information about your system.
Going into this menu is done by asking for information.
all should display everything.
bootinfo lists all the boot parameters of the system.
fwrversion gives your firmware revision.
You can check if your firmware is up-to-date at
lanaddress shows the MAC (Ethernet) address of the system.
On some boxes (especially 712s), two different addresses may appear. The one you are
looking for is the first.
188.8.131.52. The service commands
It is a PA-RISC guru menu.
You will find nothing really interesting for an end-user here.
We recommend you not to play with it unless you really
know what you are doing.