HP-UX System Administrator's Guide: Routine Management Tasks

Booting from an Alternate Boot Device
You can boot from an alternate device in following ways. If your system is set up to
automatically boot you will need to override the autoboot sequence by hitting any key
on the console keyboard during the autoboot delay (time-out) period.
□ If the alternate device that you want to boot from is listed in the boot options menu
(the main EFI Boot Manager menu), use the arrow keys to highlight the entry for
the alternate device and press Enter on the keyboard to boot from that device.
□ If the alternate device that you want to boot from is not listed in the boot options
menu:
1. Select “EFI Shell [Built-in]” from the boot options menu to run the
EFI shell.
2. Enter map at the EFI shell prompt to list bootable devices on your system.
The devices will be listed. Look for entries that begin with fs#: (where # is
a number such as 0, 1, 2, 3, etc.).
If the map command shows a lot of devices you can use the -b option to make
it show the output one screen at a time.
3. Determine which entry maps to the device you are trying to boot from and
enter the fs#: name at the shell prompt.
For example, if the entry for the device you want is tagged as “fs0:”, enter
fs0: at the shell prompt:
Shell> fs0:
The device associated with entry fs0: is now the selected boot device. The
EFI Shell prompt will change to reflect this.
4. Enter hpux to start the boot loader. The boot loader (hpux.efi) will now
run and use the AUTO file on the selected device to determine which kernel file
to use.
NOTE: On partitionable systems the default is not to search all cells and their interface
cards for devices, this is done to allow the boot process to proceed faster. If the device
you wish to boot from is not attached to an I/O card on the core cell, you must use the
search command at the EFI prompt to allow you to find additional devices on other
cells and I/O slots. For more information on the search command see nPartition
Administrator's Guide. Once a device is added to the boot manager menu that is located
on a different cell, EFI will enumerate devices on that I/O card while performing future
boots.
Booting from an Alternate Kernel File
The default kernel file name (and the kernel file name that is usually used) is vmunix.
The AUTO file in the EFI partition on a boot device typically contains the entry: “boot
44 Booting and Shutdown