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Red Hat Enterprise Linux 9 Essentials Book now available.

Purchase a copy of Red Hat Enterprise Linux 9 (RHEL 9) Essentials

Red Hat Enterprise Linux 9 Essentials Print and eBook (PDF) editions contain 34 chapters and 298 pages

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Chapter 14. Booting the Installer

Important — ramdisk.image.gz sometimes fails to load

On some machines yaboot may not boot, returning the error message:
Cannot load ramdisk.image.gz: Claim failed for initrd memory at 02000000 rc=ffffffff
To work around this issue, change real-base to c00000. You can obtain the value of real-base from the OpenFirmware prompt with the printenv command and set the value with the setenv command.
To boot an IBM System p system from a DVD, you must specify the install boot device in the System Management Services (SMS) menu.
To enter the System Management Services GUI, press the 1 key during the boot process when you hear the chime sound. This brings up a graphical interface similar to the one described in this section.
On a text console, press 1 when the self test is displaying the banner along with the tested components:
SMS console
SMS console screen
Figure 14.1. SMS console

Once in the SMS menu, select the option for Select Boot Options. In that menu, specify Select Install or Boot a Device. There, select CD/DVD, and then the bus type (in most cases SCSI). If you are uncertain, you can select to view all devices. This scans all available buses for boot devices, including network adapters and hard drives.
Finally, select the device containing the installation DVD. YABOOT is loaded from this device and you are presented with a boot: prompt. Press Enter or wait for the timeout to expire for the installation to begin.
If you are booting via the network, use the images/netboot/ppc64.img file on the DVD.

14.1. The Boot Menu

The boot media displays a graphical boot menu with several options. If no key is hit within 60 seconds, the default boot option runs. To choose the default, either wait for the timer to run out or hit Enter on the keyboard. To select a different option than the default, use the arrow keys on your keyboard, and hit Enter when the correct option is highlighted. If you want to customize the boot options for a particular option, press the Tab key.
The boot screen
The boot screen
Figure 14.2. The boot screen

For a listing and explanation of common boot options, refer to Chapter 28, Boot Options.
The boot menu options are:
Install or upgrade an existing system
This option is the default. Choose this option to install Red Hat Enterprise Linux onto your computer system using the graphical installation program.
Install system with basic video driver
This option allows you to install Red Hat Enterprise Linux in graphical mode even if the installation program is unable to load the correct driver for your video card. If your screen appears distorted or goes blank when using the the Install or upgrade an existing system option, restart your computer and try this option instead.
Rescue installed system
Choose this option to repair a problem with your installed Red Hat Enterprise Linux system that prevents you from booting normally. Although Red Hat Enterprise Linux is an exceptionally stable computing platform, it is still possible for occasional problems to occur that prevent booting. The rescue environment contains utility programs that allow you fix a wide variety of these problems.
Boot from local drive
This option boots the system from the first installed disk. If you booted this disc accidentally, use this option to boot from the hard disk immediately without starting the installer.

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