Dell PowerEdge XE2420 EMC Installation and Service Manual - Page 44

Serial Communication, Table 23. Integrated Devices details continued

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Table 23. Integrated Devices details (continued) Option Description 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 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 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. Slot n: Enables or disables or only the boot driver is disabled for the PCIe slot n. This option is set to Enabled by default. Slot Bifurcation Slot Discovery Bifurcation Settings allows Platform Default 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. Serial Communication To view the Serial Communication screen, power on the system, press F2, and click System Setup Main Menu > System BIOS > Serial Communication. Table 24. Serial Communication details Option Description Serial Communication Selects serial communication devices (Serial Device 1 and Serial Device 2) in BIOS. BIOS console redirection can also be enabled, and the port address can be specified. This option is set to Auto by default. Serial Port Address Enables you to set the port address for serial devices. . This field sets the serial port address to either COM1 or COM2 (COM1=0x3F8, COM2=0x2F8). NOTE: You can use only Serial Device 2 for the Serial Over LAN (SOL) feature. To use console redirection by SOL, configure the same port address for console redirection and the serial device. NOTE: Every time the system boots, the BIOS syncs the serial MUX setting that is saved in iDRAC. The serial MUX setting can independently be changed in iDRAC. Loading the BIOS default settings from within the BIOS setup utility may not always revert the serial MUX setting to the default setting of Serial Device 1. External Serial Connector Enables you to associate the External Serial Connector to Serial Device 1, Serial Device 2, or the Remote Access Device by using this option. This option is set to Serial Device 1 by default. NOTE: Only Serial Device 2 can be used for Serial Over LAN (SOL). To use console redirection by SOL, configure the same port address for console redirection and the serial device. NOTE: Every time the system boots, the BIOS syncs the serial MUX setting saved in iDRAC. The serial MUX setting can independently be changed in iDRAC. Loading the BIOS default settings from within the BIOS 44 Pre-operating system management applications

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Table 23. Integrated Devices details (continued)
Option
Description
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 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 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.
Slot n
: Enables or disables or only the boot driver is disabled for the PCIe slot
n. This option is set to
Enabled
by default.
Slot Bifurcation
Slot Discovery Bifurcation Settings
allows
Platform Default 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
.
Serial Communication
To view the
Serial Communication
screen, power on the system, press F2, and click
System Setup Main Menu
>
System
BIOS
>
Serial Communication
.
Table 24. Serial Communication details
Option
Description
Serial Communication
Selects serial communication devices (Serial Device 1 and Serial Device 2) in
BIOS. BIOS console redirection can also be enabled, and the port address can
be specified. This option is set to
Auto
by default.
Serial Port Address
Enables you to set the port address for serial devices. . This field sets the
serial port address to either COM1 or COM2 (COM1=0x3F8, COM2=0x2F8).
NOTE:
You can use only Serial Device 2 for the Serial Over LAN (SOL)
feature. To use console redirection by SOL, configure the same port
address for console redirection and the serial device.
NOTE:
Every time the system boots, the BIOS syncs the serial MUX
setting that is saved in iDRAC. The serial MUX setting can independently
be changed in iDRAC. Loading the BIOS default settings from within the
BIOS setup utility may not always revert the serial MUX setting to the
default setting of Serial Device 1.
External Serial Connector
Enables you to associate the External Serial Connector to
Serial Device 1
,
Serial Device 2
, or the
Remote Access Device
by using this option. This
option is set to
Serial Device 1
by default.
NOTE:
Only Serial Device 2 can be used for Serial Over LAN (SOL). To
use console redirection by SOL, configure the same port address for
console redirection and the serial device.
NOTE:
Every time the system boots, the BIOS syncs the serial MUX
setting saved in iDRAC. The serial MUX setting can independently be
changed in iDRAC. Loading the BIOS default settings from within the BIOS
44
Pre-operating system management applications