Reference Guide
BIOS Settings Name Description Supported 
Operating 
System(s)
Possible values are:
• Enable
• Disable
Optical Drive Controller
Enables or disables the Optical Drive Controller.
Possible values are:
• Enable
• Disable
Microsoft Windows
Optimus
Enables or disables the Optimus.
Possible values are:
• Enabled
• Disabled
Microsoft Windows
Optional Boot Sequence
Allows or prevents the installation of Windows operating system 
on client systems with more than one operating system volume.
Possible values are:
• Enabled
• Disabled
Microsoft Windows
OpRomUIProtection
Prompts you to enter the administrator password to enter the 
OptionROM user interface if the password has been set.
Possible values are:
• Enable
• Disable
Microsoft Windows, 
Linux
OROM Keyboard Access
Sets an option to enter the Option ROM Configuration screens 
using hotkeys during boot.
Possible values are:
• Enable
• Disable
• Onetime Enable — Allows configuring the access to Option 
ROM using hotkeys during system startup.
Microsoft Windows, 
Linux
OS Install Mode
Enables or disables OS Install Mode (Limit System Memory 
feature).
Possible values are:
• Enable
• Disable
Microsoft Windows
Parallel Mode
This property defines the parallel port mode.
Possible values are:
• AT
• PS2
• ECP
• EPP
• ECP DMA1
• ECP DMA3
Microsoft Windows, 
Linux
Parallel Port
This property defines the parallel port configuration.
Possible values are:
Microsoft Windows, 
Linux
BIOS settings supported in Dell Command | Monitor 10.2.1 271










