Option
Description
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 field. 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 configuration of Single Root I/O Virtualization (SR-IOV) devices. This option is set to
Disabled
by default.
Internal SD Card
Port
Enables or disables the internal SD card port of the Internal Dual SD Module (IDSDM). This option is set to
On
by
default.
Internal SD Card
Redundancy
Configures the redundancy mode of the Internal Dual SD Module (IDSDM). When set to
Mirror
Mode, data is
written on both SD cards. After failure of either card and replacement of the failed card, the data of the active card
is copied to the offline card during the system boot.
When Internal SD Card Redundancy is set to
Disabled
, only the primary SD card is visible to the OS. This option is
set to
Disabled
by default.
Internal SD Primary
Card
When
Redundancy
is set to
Disabled
, either one of the SD card can be selected to present itself as mass storage
device by setting it to be primary card. By default primary SD card is selected to be SD Card 1. If SD Card 1 is not
present, then the controller will select SD Card 2 to be the primary SD card.
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 effect on the system.
Memory Mapped
I/O above 4 GB
Enables or disables the support for the PCIe devices that need large amounts 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 will map MMIO base to 12 TB. Enable this option for an OS that requires 44 bit
PCIe addressing. When set to
512 GB
, the system will map MMIO base to 512 GB, and reduce 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 configuration
of the PCIe cards installed in the specified 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 36. 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.
Slot Bifurcation
Allows
Platform Default Bifurcation
,
Auto discovery of Bifurcation
and
Manual bifurcation Control
. The default
is set to
Platform Default Bifurcation
. The slot bifurcation field is accessible when set to
Manual bifurcation
Control
and is grayed out when set to
Platform Default Bifurcation
or
Auto discovery of Bifurcation
.
54
Dell EMC PowerEdge R640 Installation and Service Manual
Pre-operating system management applications
