Reference Guide

Table 16. Integrated Devices details (continued)
Option Description
When Internal SD Card Redundancy is set to Disabled, only the primary SD
card is visible to the OS. This option is set to Mirror by default.
Internal SD Primary Card By default, the primary SD card is selected to be SD Card 1. If SD Card 1 is not
present, then the controller selects SD Card 2 to be the primary SD card. This
option is set to SD Card 1 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 effect on the system.
Memory Mapped I/O Limit Controls where MMIO is mapped. The 1 TB option is designed for specific OS
which cannot support MMIO over 1 TB. This option is set to 8 TB by default.
The default option is the maximum address that the system supports and
recommended in most cases.
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 17. 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 option is set to
Serial Device1=COM2, Serial Device 2=COM1 by default.
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.
Pre-operating system management applications 13