HP-UX Virtual Partitions Administrator's Guide (includes A.05.02)

How vPars and its Components Work

Boot Sequence

Chapter 2

Boot Sequence

This section describes the boot differences in a vPars system relative to a non-vPars system.

For information on the HP-UX boot process, ISL, SSL, EFI, and vmunix, see the new HP-UX System

Administrator's Guide: Routine Management Tasks available at http://docs.hp.com and also the following

manpages:

boot (1M)

eﬁ (4)

hpux (1M)

hpux.eﬁ (1M)

isl (1M)

pdc (1M)

setboot (1M)

NOTE This section describes a manual boot sequence to help explain how vPars impacts the boot

process, but you can continue to use an autoboot sequence to boot all partitions. See “Autoboot”

on page 171.

Boot Sequence: Quick Reference

On a server without vPars, a simpliﬁed boot sequence is:

Adding vPars adds the Monitor layer, so now hpux (for Integrity, hpux.efi) loads the Monitor. Then the

Monitor boots the kernels of the virtual partitions. The boot sequence becomes

Boot Sequence: The Details

With or without vPars, the ﬁrmware loads and launches ISL or EFI.

PA-RISC Integrity

1. ISL (Initial System Loader) 1. EFI (Extensible Firmware Interface)

2. hpux (secondary system loader) 2. hpux.eﬁ (HP-UX boot loader)

3. /stand/vmunix (kernel) 3. /stand/vmunix

1. ISL or EFI

(ﬁrmware)

2. hpux or hpux.eﬁ

3. /stand/vpmon (vPars Monitor and partition database)

4. /stand/vmunix (kernels of the virtual partitions)

PA-RISC Integrity

ISL> Shell> fs0:

fs0:\> \efi\hpux\hpux.efi