Dell PowerEdge M640 EMC for VRTX enclosure Installation and Service Manual - Page 35

Serial Communication, Serial Device1=COM2 or Serial Device 2=COM1

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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 Disabled 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. 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. Empty Slot Unhide Enables or disables the root ports of all the empty slots that 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 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. Mezzanine Slot Disablement The Slot Disablement feature controls the configuration of mezzanine cards installed in the specified slots. Only mezzanine card slots that are present on your system are available for control. Serial Communication You can use the Serial Communication screen to view the properties of the serial communication port. Viewing Serial Communication To view the Serial Communication screen, perform the following steps: Steps 1. Power 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. Serial Communication details About this task The Serial Communication screen details are explained as follows: Option Description Serial Communication Enables you to select 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 device. This field sets the serial port address to either COM1 or COM2 (COM1=0x3F8, COM2=0x2F8). This option is set to Serial Device1=COM2 or 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. Pre-operating system management applications 35

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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
Disabled
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.
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.
Empty Slot Unhide
Enables or disables the root ports of all the empty slots that 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 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.
Mezzanine Slot
Disablement
The Slot Disablement feature controls the configuration of mezzanine cards installed in the specified slots. Only
mezzanine card slots that are present on your system are available for control.
Serial Communication
You can use the
Serial Communication
screen to view the properties of the serial communication port.
Viewing Serial Communication
To view the
Serial Communication
screen, perform the following steps:
Steps
1.
Power 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
.
Serial Communication details
About this task
The
Serial Communication
screen details are explained as follows:
Option
Description
Serial
Communication
Enables you to select 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 device. This field sets the serial port address to either
COM1
or
COM2
(COM1=0x3F8, COM2=0x2F8). This option is set to
Serial Device1=COM2 or 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.
Pre-operating system management applications
35