Dell EMC PowerEdge R550 Reference Manual page 12

○ Faster boot time.
NOTE: You must use only the UEFI boot mode in order to boot from NVMe drives.
● BIOS: The BIOS Boot Mode is the legacy boot mode. It is maintained for backward compatibility.
To view the Boot Settings screen, power on the system, press F2, and click System Setup Main Menu > System BIOS >
Boot Settings.
Table 10. Boot Settings details
Option
Boot Mode
Boot Sequence Retry
Hard-disk Failover
Generic USB Boot
Hard-disk Drive Placeholder
Clean all Sysprep order and variables When this option is set to None, BIOS will do nothing. When set to Yes, BIOS will
UEFI Boot Settings
Choosing system boot mode
System Setup enables you to specify one of the following boot modes for installing your operating system:
● 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.
12 Pre-operating system management applications
Description
Enables you to set the boot mode of the system. 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 UEFI by default.
CAUTION: Switching the boot mode may prevent the system from
booting if the operating system is not installed in the same boot mode.
NOTE: Setting this field to UEFI disables the BIOS Boot Settings menu.
Enables or disables the Boot sequence retry feature or resets the system. When If
this option is set to Enabled and the system fails to boot, the system re-attempts
the boot sequence after 30 seconds. When this option is set to Reset and the
system fails to boot, the system reboots immediately. This option is set to Enabled
by default.
Enables or disables the Hard-disk failover. This option is set to Disabled by default.
Enables or disables the generic USB boot placeholder. This option is set to
Disabled by default.
Enables or disables the Hard-disk drive placeholder. This option is set to Disabled
by default.
delete variables of SysPrep #### and SysPrepOrder this option is a onetime option,
will reset to none when deleting variables. This setting is only available in UEFI
Boot Mode. This option is set to None by default.
Specifies the UEFI boot sequence. Enables or disables UEFI Boot options.
NOTE: This option controls the UEFI boot order. The first option in the list will
be attempted first.
Table 11. UEFI Boot Settings
Option
UEFI Boot Sequence
Boot Options Enable/Disable
Description
Enables you to change the boot device
order.
Enables you to select the enabled or
disabled boot devices