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Option
Description
attempted to boot. When this option is set to Enabled, all drives are attempted to boot in the order selected in the
Hard-Disk Drive Sequence. This option is not enabled for UEFI Boot Mode. This option is set to Disabled by
default.
Boot Option
Configures the boot sequence and the boot devices.
Settings
BIOS Boot Settings Enables or disables BIOS boot options.
UEFI Boot Settings Enables or disables UEFI Boot options.
Choosing system boot mode
System Setup enables you to specify one of the following boot modes for installing your operating system:
•
BIOS boot mode is the standard BIOS-level boot interface.
•
UEFI boot mode (the default), is an enhanced 64-bit boot interface.
If you have configured your system to boot to UEFI mode, it replaces the system BIOS.
1
From the System Setup Main Menu, click Boot Settings, and select Boot Mode.
2
Select the UEFI boot mode you want the system to boot into.
CAUTION:
Switching the boot mode may prevent the system from booting if the operating system is not installed in the
same boot mode.
3
After the system boots in the specified boot mode, proceed to install your operating system from that mode.
NOTE:
Operating systems must be UEFI-compatible to be installed from the UEFI boot mode. DOS and 32-bit operating systems
do not support UEFI and can only be installed from the BIOS boot mode.
NOTE:
For the latest information about supported operating systems, go to Dell.com/ossupport.
Changing boot order
About this task
You may have to change the boot order if you want to boot from a USB key. You may have to change the boot order if you want to boot
from a USB key or an optical drive. The following instructions may vary if you have selected BIOS for Boot Mode.
Steps
1
On the System Setup Main Menu screen, click System BIOS > Boot Settings > UEFI/BIOS Boot Settings > UEFI/BIOS Boot
Sequence.
2
Click Boot Option Settings > BIOS/UEFI Boot Settings > Boot Sequence.
3
Use the arrow keys to select a boot device, and use the plus (+) and minus (-) sign keys to move the device down or up in the order.
4
Click Exit, and then click Yes to save the settings on exit.
44
Installation and Service Manual
Pre-operating system management applications
NOTE:
This option is enabled only if the boot mode is BIOS.
NOTE:
This option is enabled only if the boot mode is UEFI.
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