The BIOS of every computer has a setting for the device that should boot by default. Often, the server will look on its hard drive from which to initiate the boot procedure. On there, it reads the first sector of 512 bytes, which is called the master boot record (MBR). If your server has SUSE Linux Enterprise Server installed, it will find the GRUB primary boot loader in its first 446 bytes. After that, the partition table is stored in 64 bytes, and a magic code is written in the last two bytes of the 512 bytes. Upon installation of your server, the installation program writes the GRUB boot code automatically. This code makes sure your server displays a boot screen, as shown in Figure 10-1. In the following sections, you will learn how you can modify this code if so required.
N Startup Options
SUSE Linux Enterprise Server 10 (XEN) Floppy
SUSE Linux Enterprise Server 10 (Failsafe)
Figure 10-1. GRUB offers you a boot screen where you can specify what you want to start.
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