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-rw-r--r--documentation/ref-manual/ref-classes.xml58
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diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 1351991985..ccab5e68ab 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -319,64 +319,6 @@
</para>
</section>
-<section id='ref-classes-boot-directdisk'>
- <title><filename>boot-directdisk.bbclass</filename></title>
-
- <para>
- The <filename>boot-directdisk</filename> class
- creates an image that can be placed directly onto a hard disk using
- <filename>dd</filename> and then booted.
- The image uses SYSLINUX.
- </para>
-
- <para>
- The end result is a 512 boot sector populated with a
- Master Boot Record (MBR) and partition table followed by an MSDOS
- FAT16 partition containing SYSLINUX and a Linux kernel completed by
- the <filename>ext2</filename> and <filename>ext3</filename>
- root filesystems.
- </para>
-</section>
-
-<section id='ref-classes-bootimg'>
- <title><filename>bootimg.bbclass</filename></title>
-
- <para>
- The <filename>bootimg</filename> class creates a bootable
- image using SYSLINUX, your kernel, and an optional initial RAM disk
- (<filename>initrd</filename>).
- </para>
-
- <para>
- When you use this class, two things happen:
- <itemizedlist>
- <listitem><para>
- A <filename>.hddimg</filename> file is created.
- This file is an MSDOS filesystem that contains SYSLINUX,
- a kernel, an <filename>initrd</filename>, and a root filesystem
- image.
- All three of these can be written to hard drives directly and
- also booted on a USB flash disks using <filename>dd</filename>.
- </para></listitem>
- <listitem><para>
- A CD <filename>.iso</filename> image is created.
- When this file is booted, the <filename>initrd</filename>
- boots and processes the label selected in SYSLINUX.
- Actions based on the label are then performed (e.g. installing
- to a hard drive).</para></listitem>
- </itemizedlist>
- </para>
-
- <para>
- The <filename>bootimg</filename> class supports the
- <link linkend='var-INITRD'><filename>INITRD</filename></link>,
- <link linkend='var-NOISO'><filename>NOISO</filename></link>,
- <link linkend='var-NOHDD'><filename>NOHDD</filename></link>, and
- <link linkend='var-ROOTFS'><filename>ROOTFS</filename></link>
- variables.
- </para>
-</section>
-
<section id='ref-classes-bugzilla'>
<title><filename>bugzilla.bbclass</filename></title>