Owners Manual

Option Description
CAUTION: Switching the boot mode may prevent the system from booting if the operating
system is not installed in the same boot mode.
If the operating system supports UEFI, you can set this option to UEFI. Setting this field to BIOS allows
compatibility with non-UEFI operating systems. This option is set to BIOS by default.
NOTE: Setting this field to UEFI disables the BIOS Boot Settings menu. Setting this field to BIOS
disables the UEFI Boot Settings menu.
Boot Sequence
Retry
Enables or disables the Boot Sequence Retry feature. If this option is set to Enabled and the system fails
to boot, the system reattempts the boot sequence after 30 seconds. This option is set to Enabled by
default.
Hard-Disk
Failover
Specifies the hard drive that is booted in the event of a hard drive failure. The devices are selected in the
Hard-Disk Drive Sequence on the Boot Option Setting menu. When this option is set to Disabled,
only the first hard drive in the list is attempted to boot. When this option is set to Enabled, all hard drives
are attempted to boot in the order selected in the Hard-Disk Drive Sequence. This option is not enabled
for UEFI Boot Mode.
Boot Option
Settings
Configures the boot sequence and the boot devices.
Related references
Boot Settings on page 28
Choosing the system boot mode on page 29
Related tasks
Viewing Boot Settings on page 28
Changing the boot order on page 30
Choosing the system boot mode
System Setup enables you to specify one of the following boot modes for installing your operating system:
● BIOS boot mode (the default) is the standard BIOS-level boot interface.
● Unified Extensible Firmware Interface (UEFI) boot mode 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 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.
Related references
Boot Settings on page 28
Related tasks
Boot Settings details on page 28
Viewing Boot Settings on page 28
Pre-operating system management applications
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