Users Guide

88 Installing Managed System Software on Red Hat

Enterprise Linux Operating Systems

If you see the following message during Server Administrator Device Drivers startup, then Server

Administrator attempted to use its DKS feature, but was unable to use the feature because certain

prerequisites were not met:

Building dcd*** device driver using DKS... [FAILED]

NOTE: Server Administrator logs messages to the /var/log/messages log file.

To use DKS, you should identify which kernel you have running, then check the DKS prerequisites.

Determining the Running Kernel

root

Type the following command at a console and press <Enter>:

uname -r

The system displays a message identifying the running kernel. If it is not one of those listed in the

managed system software readme file, then the managed system software may need to use DKS to

support it.

Dynamic Kernel Support Prerequisites

For managed system software to use DKS, the following dependencies must be met before starting Server

Administrator.

• The running kernel must have loadable module support enabled.

• The source for building kernel modules for the running kernel must be available from

/lib/modules/`uname –r`/build

. On systems running Red Hat Enterprise Linux (version 3 and below),

the kernel-source RPM provides the necessary kernel source. On systems running Red Hat Enterprise

Linux (version 4), the

kernel*-devel

RPMs provide the necessary kernel source for building kernel

modules.

• The GNU make utility must be installed. The

make

RPM provides this utility.

• The GNU C compiler (gcc) must be installed. The

gcc

RPM provides this compiler.

• The GNU linker (ld) must be installed. The

binutils

RPM provides this linker.

When these prerequisites have been met, DKS will automatically build a device driver when needed

during Server Administrator startup.

NOTE: Unsupported kernels are kernels that are not supported by a precompiled device driver. If you are running a

supported kernel, see "Installing and Upgrading Managed System Software."

Using Dynamic Kernel Support After Server Administrator Installation

To enable Server Administrator to support a kernel that is not supported by a precompiled device driver

and is loaded after Server Administrator has been installed, perform the following steps:

Ensure that the DKS prerequisites are met on the system to be managed.

Boot the new kernel on the system.