Deployment Guide

System BIOS
39 Setting up BIOS on 15th Generation (15G) Dell EMC PowerEdge Servers | 508
slot. Slot disablement must be used only when the
installed peripheral card is preventing booting into the
OS or causing delays or lockups in system startup.
If the slot is disabled, both the Option ROM and UEFI
driver are disabled. The card is not enumerated on the
PCI bus and won’t be available to the OS.
If the Boot Drive is disabled, then the option ROM or
UEFI driver from that slot will not run during POST. As
a result, the system cannot boot from the card, and its
pre-boot services are also not available. However, the
card is available to the OS.
Note: This option is not available if the slot contains a
Dell EMC PowerEdge RAID Card (PERC).
Note: Some PCIe device manufacturers implement a
master boot driver that can initialize and manage all
the similar devices in the system. In this case, to make
sure the option ROM and UEFI driver do not run, select
Boot Driver Disabled for all the cards from the same
manufacturer (including its integrated device versions
such as NDCs).
Slot
Bifurcation
N/A
Enables configuration of how the PCIe slots are
bifurcated.
Auto
Discovery
Bifurcation
Settings
• Platform Default
Bifurcation
• Auto Discovery of
Bifurcation
• Manual Bifurcation
Control
Enables BIOS to dynamically scan for PCIe devices
rather than relying strictly on system slot definitions.
• The Platform Default setting will strictly follow the
system slot definitions when configuring each PCIe
slot.
• The Auto Discovery setting will analyze the
installed PCIe cards and determine the correct
configuration for each slot. This may include
bifurcation of the slot for multiple devices.
• Manual Control allows the user to override
bifurcation settings for each slot.
CAUTION: Improper configuration of PCIe slots can
prevent the system from functioning properly.