[f8d632ac] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[6732c094] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[f8d632ac] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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[46b900a] | 8 | <sect1 id="postlfs-config-bootdisk" xreflabel="Creating a Custom Boot Device">
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[1e247d1] | 9 | <?dbhtml filename="bootdisk.html"?>
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| 10 |
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| 11 |
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| 12 | <title>Creating a Custom Boot Device</title>
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| 13 |
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| 14 | <sect2>
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| 15 | <title>Decent Rescue Boot Device Needs</title>
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| 16 |
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[81a73ed8] | 17 | <para>
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| 18 | This section is really about creating a <emphasis>rescue</emphasis>
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| 19 | device. As the name <emphasis>rescue</emphasis> implies, the host
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| 20 | system has a problem, often lost partition information or corrupted file
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| 21 | systems, that prevents it from booting and/or operating normally. For
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| 22 | this reason, you <emphasis>must not</emphasis> depend on resources from
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| 23 | the host being "rescued". To presume that any given partition or hard
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| 24 | drive <emphasis>will</emphasis> be available is a risky presumption.
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| 25 | </para>
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| 26 |
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| 27 | <para>
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| 28 | In a modern system, there are many devices that can be used as a
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| 29 | rescue device: floppy, cdrom, usb drive, or even a network card.
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| 30 | Which one you use depends on your hardware and your BIOS. In the past,
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| 31 | a rescue device was thought to be a floppy disk. Today, many
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| 32 | systems do not even have a floppy drive.
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| 33 | </para>
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| 34 |
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| 35 | <para>
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| 36 | Building a complete rescue device is a challenging task. In many
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| 37 | ways, it is equivalent to building an entire LFS system.
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| 38 | In addition, it would be a repetition of information already available.
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| 39 | For these reasons, the procedures for a rescue device image are not
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| 40 | presented here.
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| 41 | </para>
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[1e247d1] | 42 |
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| 43 | </sect2>
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| 44 |
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| 45 | <sect2>
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| 46 | <title>Creating a Rescue Floppy</title>
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| 47 |
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[81a73ed8] | 48 | <para>
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| 49 | The software of today's systems has grown large. Linux 2.6 no longer
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| 50 | supports booting directly from a floppy. In spite of this, there are
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| 51 | solutions available using older versions of Linux. One of the best is
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| 52 | Tom's Root/Boot Disk available at <ulink
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| 53 | url='http://www.toms.net/rb/'/>. This will provide a minimal Linux
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| 54 | system on a single floppy disk and provides the ability to customize
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| 55 | the contents of your disk if necessary.
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| 56 | </para>
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[1e247d1] | 57 |
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| 58 | </sect2>
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| 59 |
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| 60 | <sect2>
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| 61 | <title>Creating a Bootable CD-ROM</title>
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| 62 |
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[81a73ed8] | 63 | <para>
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| 64 | There are several sources that can be used for a rescue CD-ROM.
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| 65 | Just about any commercial distribution's installation CD-ROMs or
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| 66 | DVDs will work. These include RedHat, Ubuntu, and SuSE. One
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| 67 | very popular option is Knoppix.
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| 68 | </para>
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| 69 |
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| 70 | <para>
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| 71 | Also, the LFS Community has developed its own LiveCD available at
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[4a570af1] | 72 | <ulink url='https://www.&lfs-domainname;/livecd/'/>. This LiveCD, is no
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[81a73ed8] | 73 | longer capable of building an entire LFS/BLFS system, but is still a
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| 74 | good rescue CD-ROM. If you download the
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| 75 | ISO image, use <xref linkend="xorriso"/> to copy the image to a
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| 76 | CD-ROM.
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| 77 | </para>
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| 78 |
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| 79 | <para>
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| 80 | The instructions for using GRUB2 to make a custom rescue CD-ROM are
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[cd29bc9] | 81 | also available in <ulink url='&lfs-root;/chapter10/grub.html'>LFS
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[f0dc9578] | 82 | Chapter 10</ulink>.
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[81a73ed8] | 83 | </para>
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[8b36866] | 84 |
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[1e247d1] | 85 | </sect2>
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| 86 |
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| 87 | <sect2>
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| 88 | <title>Creating a Bootable USB Drive</title>
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| 89 |
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[81a73ed8] | 90 | <para>
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| 91 | A USB Pen drive, sometimes called a Thumb drive, is recognized by Linux
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| 92 | as a SCSI device. Using one of these devices as a rescue device has
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| 93 | the advantage that it is usually large enough to hold more than a
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| 94 | minimal boot image. You can save critical data to the drive as well
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| 95 | as use it to diagnose and recover a damaged system. Booting such a
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| 96 | drive requires BIOS support, but building the system consists of
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| 97 | formatting the drive, adding <application>GRUB</application> as well
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| 98 | as the Linux kernel and supporting files.
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| 99 | </para>
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[1e247d1] | 100 |
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| 101 | </sect2>
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| 102 | </sect1>
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