Dell EMC PowerEdge R540

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Option Description

Internal microSD

Primary Card

When you setRedundancy to Disabled, you can select one of the MicroSD cards as the primary card that

functions as a mass storage device. By default, the primary MicroSD card is selected to be SD Card 1. If MicroSD

Card 1 is not present, then the controller selects MicroSD Card 2 to be the primary MicroSD 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 eect on the system.

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 above 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.

Slot Disablement Enables or disables the available PCIe slots on your system. The slot disablement feature controls the conguration

of the PCIe cards installed in the specied 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 39. Slot Disablement

Option Description

Slot 1