Red Hat LINUX 7.2 - OFFICIAL LINUX CUSTOMIZATION GUIDE Guida di Installazione Scaricare il pdf (Pagina 261)

Appendix A.

General Parameters and Modules

This appendix is provided to illustrate some of the possible parameters that may be needed by certain

drivers

for particular hardware devices. In most cases, these additional parameters are unnecessary,

since the kernel may already be able to use the device without them. You should only use the settings

provided in this appendix if you are having trouble getting Red Hat Linux to use a particular device

or you need to override the system’s default parameters for the device.

During the installation of Red Hat Linux, some limits are placed on ﬁle systems and particular device

drivers supported by the kernel. After installation, however, support exists for all ﬁle systems avail-

able under Linux. At the time of installation, the modularized kernel has support for (E)IDE devices

(including ATAPI CD-ROM drives), SCSI adapters, and network cards.

Note

Because Red Hat Linux supports installation on many different types of hardware, some drivers

(including those for SCSI adapters, network cards, and many CD-ROMs) are not built into the Linux

kernel used by the installation program. Rather, they are available as modules and are loaded as you

need them during the installation process. If necessary, you will have the chance to specify options

for these modules when they are loaded from the driver disk.

To specify module parameters when a driver is loaded, type linux expert at the boot: prompt

and insert the driver disk when prompted to do so by the installation program. After reading the

driver disk, the installation program will ask you to select the type of device you are conﬁguring. On

that screen, you can elect to specify a module parameter. Then, the installation program will display

a screen where you can type the correct parameters based on the particular type of device you are

conﬁguring.

After the installation is complete, you may want to rebuild a kernel that includes support for your

speciﬁc hardware conﬁguration. Note that in most cases, a custom-built kernel is not necessary. See

the Ofﬁcial Red Hat Linux Customization Guide for more information about rebuilding your kernel.

A.1. Specifying Module Parameters

If you are providing parameters upon loading a module, you can usually specify them using one of

two different methods:

• Specify a full set of parameters in one statement. For example, the parameter cdu31=0x340,0

could be used with a Sony CDU 31 or 33 at port 340 with no IRQ.

• Specify the parameters individually. This method is used when one or more parameters in the

ﬁrst set are not needed. For example, cdu31_port=0x340 cdu31a_irq=0 can be used as the

parameter for the same CD-ROM used as an example for the ﬁrst method. An OR is used in the

CD-ROM, SCSI, and Ethernet tables in this appendix to show where the ﬁrst parameter method

stops and the second method begins.

1. A driver is software enabling your system to use a particular hardware device. Without the driver, the kernel

may not know how to correctly utilize the device.

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Red Hat LINUX 7.2 - OFFICIAL LINUX CUSTOMIZATION GUIDE Guida di Installazione Pagina 261