Dell PowerEdge R740xd2 EMC Installation and Service Manual - Page 33

Table 5. Slot Disablement, Table 6. Slot Bifurcation, Auto Discovery Bifurcation Settings

Page 33 highlights

Option Description Empty Slot Unhide If Enabled, the root ports of all the empty slots are accessible to the BIOS and OS. This option is set to Disabled by default. Memory Mapped Enables or disables the support for the PCIe devices that need large amounts of memory. Enable this option only I/O above 4 GB for 64-bit operating systems. This option is set to Enabled by default. Memory Mapped I/O 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 5. Slot Disablement Option Slot 1 Description Enables or disables or only the boot driver is disabled for the PCIe slot 1. This option is set to Enabled by default. Slot 2 Enables or disables or only the boot driver is disabled for the PCIe slot 2. 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 6 Enables or disables or only the boot driver is disabled for the PCIe slot 6. 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. Table 6. Slot Bifurcation Option Auto Discovery Bifurcation Settings Description Platform Default Bifurcation , Auto Bifurcation, and Manual bifurcation Slot 1 Bifurcation x4 or x8 Bifurcation Slot 2 Bifurcation x4 or x8 Bifurcation Slot 3 Bifurcation x4 or x8 Bifurcation Pre-operating system management applications 33

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Option
Description
Empty Slot Unhide
If
Enabled
, the root ports of all the empty slots are accessible to the BIOS and OS. This option is set to
Disabled
by default.
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 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 5. Slot Disablement
Option
Description
Slot 1
Enables or disables or only the boot driver is disabled
for the PCIe slot 1. This option is set to
Enabled
by
default.
Slot 2
Enables or disables or only the boot driver is disabled
for the PCIe slot 2. 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 6
Enables or disables or only the boot driver is disabled
for the PCIe slot 6. 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
.
Table 6. Slot Bifurcation
Option
Description
Auto Discovery Bifurcation Settings
Platform Default Bifurcation , Auto Bifurcation, and
Manual bifurcation
Slot 1 Bifurcation
x4 or x8 Bifurcation
Slot 2 Bifurcation
x4 or x8 Bifurcation
Slot 3 Bifurcation
x4 or x8 Bifurcation
Pre-operating system management applications
33