Owners Manual

Option Description
iDRAC Direct USB
Port
The iDRAC Direct USB port is managed by iDRAC exclusively with no host visibility. This option is set to ON or
OFF. When set to OFF, iDRAC does not detect any USB devices installed in this managed port. This option is set
to On by default.
Embedded NIC1 Enables or disables the Embedded NIC1 port. The option is set to Enabled by default.
I/OAT DMA Engine Enables or disables the I/O Acceleration Technology (I/OAT) option. I/OAT is a set of DMA features designed to
accelerate network trac and lower CPU utilization. Enable only if the hardware and software support the
feature.This option is set to Disabled by default.
Embedded Video
Controller
Enables or disables the use of Embedded Video Controller as the primary display. When set to Enabled, the
Embedded Video Controller will be the primary display even if add-in graphic cards are installed. When set to
Disabled, an add-in graphics card will be used as the primary display. BIOS will output displays to both the primary
add-in video and the embedded video during POST and pre-boot environment. The embedded video will then be
disabled right before the operating system boots. This option is set to
Enabled by default.
NOTE: When there are multiple add-in graphic cards installed in the system, the rst card discovered
during PCI enumeration is selected as the primary video. You might have to re-arrange the cards in the
slots in order to control which card is the primary video.
Current State of
Embedded Video
Controller
Displays the current state of the embedded video controller. The Current State of Embedded Video Controller
option is a read-only eld. If the Embedded Video Controller is the only display capability in the system (that is, no
add-in graphics card is installed), then the Embedded Video Controller is automatically used as the primary display
even if the Embedded Video Controller setting is set to Disabled.
SR-IOV Global
Enable
Enables or disables the BIOS conguration of Single Root I/O Virtualization (SR-IOV) devices. This option is set to
Disabled by default.
OS Watchdog
Timer
If your system stops responding, this watchdog timer aids in the recovery of your operating system. When this
option is set to Enabled, the operating system initializes the timer. When this option is set to Disabled (the
default), the timer does not have any eect on the system.
Memory Mapped
I/O above 4 GB
Enables or disables the support for the PCIe devices that require large amount of memory. Enable this option only
for 64-bit operating systems. This option is set to Enabled by default.
Memory Mapped
I/O above Base
When set to 12 TB, the system maps the MMIO base to 12 TB. Enable this option for an OS that requires 44 bit
PCIe addressing. When set to 512 GB, the system maps the MMIO base to 512 GB, and reduces the maximum
support for memory to less than 512 GB. Enable this option only for the 4 GPU DGMA issue. This option is set to
56 TB by default.
Slot Disablement Enables or disables the available PCIe slots on your system. The slot disablement feature controls the conguration
of the PCIe cards installed in the specied slot. Slots must be disabled only when the installed peripheral card
prevents booting into the operating system or causes delays in system startup. If the slot is disabled, both the
Option ROM and UEFI drivers are disabled. Only slots that are present on the system will be available for control.
Table 25. Slot Disablement
Option Description
Slot 1
Enables or disables the PCIe slot 1. This option is set to
Enabled by default.
Slot 3
Enables or disables or only the boot driver is disabled
for the PCIe slot 3. This option is set to Enabled by
default.
Slot 4
Enables or disables or only the boot driver is disabled
for the PCIe slot 4. This option is set to Enabled by
default.
Slot 5
Enables or disables or only the boot driver is disabled
for the PCIe slot 5. This option is set to Enabled by
default.
38 Pre-operating system management applications