Understanding the boot options

After the initial restart, a menu with different boot options will be displayed, as shown in the following screenshot:

If no button is pressed within 5 seconds, the option used on the previous boot is automatically chosen. The different boot options are as follows:

• default boot: This is the best option for most servers, and provides you with the best graphical experience.
• safe video mode: This is another video configuration that may work if the default option fails. It attempts the most basic video configuration in a low resolution (1024 x 768).
• kern video mode: This is another video configuration that may work if the previous options fail.
• hardware safe mode: This is another option that might be better for some hardware. It disables APIC and ACPI, and hides the bootsplash screen.

  Note

  Advanced Programmable Interrupt Controller (APIC) is an architectural design intended to solve interrupted routing efficiency issues in multiprocessor/multicore computer systems.

  Advanced Configuration and Power Interface (ACPI) is an open standard that allows the operating system to directly configure, power-manage, and thermal-manage the motherboards. Simply, it changes the way your board communicates with CPU, RAM, PCI slots.

• recovery mode: This option launches the recovery utility, which will be covered later in Chapter 5, Advanced Administration Settings.

To start the initial configuration wizard, select any boot option except the recovery mode option.