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98078a636a
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@7114 af4574ff-66df-0310-9fd7-8a98e5e911e0
88 lines
3.8 KiB
XML
88 lines
3.8 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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]>
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<sect1 id="postlfs-config-bootdisk" xreflabel="Creating a Custom Boot Device">
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<?dbhtml filename="bootdisk.html"?>
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<sect1info>
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<othername>$LastChangedBy$</othername>
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<date>$Date$</date>
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</sect1info>
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<title>Creating a Custom Boot Device</title>
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<sect2>
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<title>Decent Rescue Boot Device Needs</title>
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<para>This section is really about creating a <emphasis>rescue</emphasis>
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device. As the name <emphasis>rescue</emphasis> implies, the host
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system has a problem, often lost partition information or corrupted file
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systems, that prevents it from booting and/or operating normally. For
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this reason, you <emphasis>must not</emphasis> depend on resources from
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the host being "rescued". To presume that any given partition or hard
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drive <emphasis>will</emphasis> be available is a risky presumption.</para>
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<para>In a modern system, there are many devices that can be
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used as a rescue device: floppy, cdrom, usb drive, or even a network card.
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Which one you use depends on your hardware and your BIOS. In the past,
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we usually thought of rescue device as a floppy disk. Today, many
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systems do not even have a floppy drive.</para>
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<para>Building a complete rescue device is a challenging task. In many
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ways, it is equivalent to building an entire LFS system.
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In addition, it would be a repetition of information already available.
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For these reasons, the procedures for a rescue device image are not
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presented here.</para>
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</sect2>
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<sect2>
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<title>Creating a Rescue Floppy</title>
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<para>The software of today's systems has grown large. Linux 2.6 no longer
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supports booting directly from a floppy. In spite of this, there are solutions
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available using older versions of Linux. One of the best is Tom's Root/Boot
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Disk available at <ulink url='http://www.toms.net/rb/'/>. This will provide a
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minimal Linux system on a single floppy disk and provides the ability to
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customize the contents of your disk if necessary.</para>
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</sect2>
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<sect2>
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<title>Creating a Bootable CD-ROM</title>
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<para>There are several sources that can be used for a rescue CD-ROM.
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Just about any commercial distribution's installation CD-ROMs or
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DVDs will work. These include RedHat, Mandrake, and SuSE. One
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very popular option is Knoppix.</para>
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<para>Also, the LFS Community has developed its own LiveCD available at
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<ulink url='http://www.&lfs-domainname;/livecd/'/>. This LiveCD, in
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addition to having boot and rescue capabilities, is capable of building an
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entire LFS/BLFS system. A copy of this CD-ROM is available with the
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printed version of the Linux From Scratch book. If you download the ISO
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image, use <xref linkend='cdrecord'/> to copy the image to a CD-ROM.</para>
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</sect2>
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<sect2>
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<title>Creating a Bootable USB Drive</title>
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<para>A USB Pen drive, sometimes called a Thumb drive, is recognized by Linux as
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a SCSI device. Using one of these devices as a rescue device has the advantage
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that it is usually large enough to hold more than a minimal boot image. You
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can save critical data to the drive as well as use it to diagnose and recover
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a damaged system. Booting such a drive requires BIOS support, but building the
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system consists of formatting the drive, adding <application>GRUB</application>
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as well as the Linux kernel and supporting files.</para>
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<para condition="html" role="usernotes">User Notes:
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<ulink url='&blfs-wiki;/CreatingaCustomBootDevice'/></para>
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</sect2>
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</sect1>
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