Booting and Shutdown in HP-UX Release 11i Version 1.5

Avoiding a Shutdown When Possible

Chapter 18

Avoiding a Shutdown When Possible

There are times when a normal, planned shutdown is appropriate. But

as server downtime becomes less desired and accepted, OLA/R (on-line

addition and replace) functionality and DLKMs (dynamically loadable

kernel modules) can help you to avoid shutting down a server in many

cases.

On-line Addition and Replacement of PCI Cards

(OLA/R)

HP-UX’s On-line Addition and Replacement of PCI Cards (OLA/R)

features enable you to replace a faulty interface card or add a new

interface card to a running system, without impacting the system’s

users.

Refer to Conﬁguring HP-UX for Peripherals for detailed OLA/R concepts

and procedures.

Dynamically Loadable Kernel Modules (DLKM)

The DLKM infrastructure is an HP-UX operating system feature that

enables you to dynamically load “DLKM-enabled” kernel modules into,

or unload them from, the running HP-UX kernel, without the need to

re-link the entire kernel and reboot the system. Although the base

HP-UX Release 11i Version 1.5 is not released with DLKM-enabled

kernel modules, certain optional and add-on HP-UX software is available

as DLKM-enabled modules. Refer to the white paper Managing and

Developing Dynamically Loadable Kernel Modules for detailed DLKM

concepts and procedures.