Managing Systems and Workgroups: A Guide for HP-UX System Administrators

Administering a System: Booting and Shutdown

Booting Systems

Chapter 5 465

If you are booting a PA-RISC System see Booting HP-UX on HP 9000

(PA-RISC) Systems: Details and Variations.

Booting HP-UX on HP Integrity Servers: Details and

Variations

“The Boot Sequence: Starting an HP-UX System” on page 464 describes

the basic sequence of events that occurs when you turn on, reset, or

reboot an HP Integrity Server. This section covers the boot process more

thoroughly because there are times when you will need to manually

control the boot process; for example:

• When you need to boot your system from a device other than the

device from which you normally boot.

• When you need to boot your system from a kernel ﬁle other than the

kernel ﬁle from which you normally boot.

• When you need to boot the system into Single-User Mode to ensure

that special tasks you are doing are not affected by other users of the

system.

• When you need to boot your system into LVM Maintenance mode to

correct a problem with your computer’s logical volumes or volume

groups.

• When you are installing, or updating to a new release of HP-UX.

Here is a detailed look at the boot process, and its variations.

CAUTION ACPI Conﬁguration for HP-UX Must Be “default” on nPartitionable HP

Integrity Servers

HP-UX will not boot on an nPartition-capable system if the ACPI

conﬁguration value is not set to “DEFAULT”.

To check the current ACPI conﬁguration, at the EFI Shell interface enter

the acpiconfig command with no arguments. If the acpiconfig value

is not set to default, then HP-UX cannot boot; in this situation you

must reconﬁgure acpiconfig or else booting will be interrupted with a

panic when launching the HP-UX kernel.