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Chapter 3. Making Media
This chapter describes how to use ISO image files obtained by following the steps in Chapter 2, Downloading Red Hat Enterprise Linux to create bootable physical media, such as a DVD or a USB flash drive. You can then use these media to boot the installation program and start the installation. These steps only apply if you plan to install Red Hat Enterprise Linux on a 64-bit AMD, Intel, or ARM system, or an IBM Power Systems server using physical boot media. For information about installing Red Hat Enterprise Linux on an IBM Z server, see Chapter 16, Booting the Installation on IBM Z. For instructions on how to set up a Preboot Execution Environment (PXE) server to perform a PXE-based installation over a network, see Chapter 24, Preparing for a Network Installation.
By default, the
inst.stage2=boot option is used on the installation media and set to a specific label (for example,
inst.stage2=hd:LABEL=RHEL7\x20Server.x86_64). If you modify the default label of the file system containing the runtime image, or if using a customized procedure to boot the installation system, you must ensure this option is set to the correct value. See Specifying the Installation Source for details.
3.1. Making an Installation CD or DVD
You can make an installation CD or DVD using burning software on your computer and a CD/DVD burner. The exact series of steps that produces an optical disc from an ISO image file varies greatly from computer to computer, depending on the operating system and disc burning software installed. Consult your burning software's documentation for the exact steps needed to burn a CD or DVD from an ISO image file.
It is possible to use optical discs (CDs and DVDs) to create both minimal boot media and full installation media. However, it is important to note that due to the large size of the full installation ISO image (between 4 and 4.5 GB), only a DVD can be used to create a full installation disc. Minimal boot ISO is roughly 300 MB, allowing it to be burned to either a CD or a DVD.
Make sure that your disc burning software is capable of burning discs from image files. Although this is true of most disc burning software, exceptions exist. In particular, note that the disc burning feature built into Windows XP and Windows Vista cannot burn DVDs; and that earlier Windows operating systems did not have any disc burning capability installed by default at all. Therefore, if your computer has a Windows operating system prior to Windows 7 installed on it, you need a separate piece of software for this task. Examples of popular disc burning software for Windows that you might already have on your computer include Nero Burning ROM and Roxio Creator. Most widely used disc burning software for Linux, such as Brasero and K3b, also has the built-in ability to burn discs from ISO image files.
On some computers, the option to burn a disc from an ISO file is integrated into a context menu in the file browser. For example, when you right-click an ISO file on a computer with a Linux or UNIX operating system which runs the GNOME desktop, the Nautilus file browser presents you with the option to Write to disk.