Option
Description
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 PCIe devices that need large amounts of memory. This option is set to
Enabled
by default.
Slot Disablement
Enables or disables the available PCIe slots on your system. The slot disablement feature controls the
configuration of 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.
Related links
Integrated Devices
Viewing Integrated Devices
Serial Communication
You can use the
Serial Communication
screen to view the properties of the serial communication port.
Related links
Serial Communication details
System BIOS
Viewing Serial Communication
Viewing Serial Communication
To view the
Serial Communication
screen, perform the following steps:
1.
Turn on, or restart your system.
2.
Press F2 immediately after you see the following message:
F2 = System Setup
NOTE: If your operating system begins to load before you press F2, wait for the system to finish booting, and then
restart your system and try again.
3.
On the
System Setup Main Menu
screen, click
System BIOS
.
4.
On the
System BIOS
screen, click
Serial Communication
.
Related links
Serial Communication
Serial Communication details
Serial Communication details
The
Serial Communication
screen details are explained as follows:
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 Device 1=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 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.
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