Reference Guide
Table Of Contents
- Dell EMC PowerEdge C6420 BIOS and UEFI Reference Guide
- Contents
- Pre-operating system management applications
- Options to manage the pre-operating system applications
- System Setup
- Viewing System Setup
- System Setup details
- System BIOS
- Viewing System BIOS
- System BIOS Settings details
- System Information
- Viewing System Information
- System Information details
- Memory Settings
- Viewing Memory Settings
- Memory Settings details
- Processor Settings
- Viewing Processor Settings
- Processor Settings details
- SATA Settings
- Viewing SATA Settings
- SATA Settings details
- NVMe Settings
- Viewing NVMe Settings
- NVMe Settings details
- Boot Settings
- Viewing Boot Settings
- Boot Settings details
- Choosing system boot mode
- Changing boot order
- Network Settings
- Viewing Network Settings
- Network Settings screen details
- Integrated Devices
- Viewing Integrated Devices
- Integrated Devices details
- Serial Communication
- Viewing Serial Communication
- Serial Communication details
- System Profile Settings
- Viewing System Profile Settings
- System Profile Settings details
- System Security
- Viewing System Security
- System Security Settings details
- Creating a system and setup password
- Using your system password to secure the system
- Deleting or changing system and setup password
- Operating with setup password enabled
- Redundant OS Control
- Viewing Redundant OS Control
- Redundant OS Control screen details
- Miscellaneous Settings
- Viewing Miscellaneous Settings
- Miscellaneous Settings details
- iDRAC Settings utility
- Device Settings
- Dell Lifecycle Controller
- Boot Manager
- PXE boot
Option Description
system (that is, no add-in graphics card is installed), then the Embedded Video Controller is automatically
used as the primary display even if the Embedded Video Controller setting is set to Enabled.
SR-IOV Global
Enable
Enables or disables the BIOS configuration of Single Root I/O Virtualization (SR-IOV) devices. This option
is set to Disabled 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.
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 MMIO base to 12 TB. MMIO base default is 56 TB. The default value
must not be changed, unless addressing a known issue. Enable this feature for an OS that requires 44 bit
PCIe addressing.
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 are available for control.
Table 3. 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 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.
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
16
Pre-operating system management applications