Dell PowerEdge MX840c EMC PowerEdge MX840c Installation and Service Manual - Page 31

Option Description The USB keyboard and mouse still function in certain USB ports during the boot process, depending on the selection. After the boot process is complete, the USB ports will be enabled or disabled as per the setting. Internal USB Port iDRAC Direct USB Port Integrated RAID Controller I/OAT DMA Engine I/O Snoop HoldOff Response Embedded Video Controller Enables or disables the internal USB port. This option is set to On by default. The iDRAC Direct USB port is managed by iDRAC exclusively with no host visibility. This option is set to ON or OFF. When set to OFF, iDRAC does not detect any USB devices installed in this managed port. This option is set to On by default. Enables or disables the integrated RAID controllers. This option is set to Enabled by default. Enables or disables the I/O Acceleration Technology (I/OAT) option. I/OAT is a set of DMA features designed to accelerate network traffic and lower CPU utilization. Enable only if the hardware and software support the feature. Enables you to select the number of cycles PCI I/O can withhold snoop requests from the CPU to allow time to complete its own write to LLC. This setting can help improve performance on workloads where throughput and latency are critical. Enables or disables the use of Embedded Video Controller as the primary display. When set to Enabled, the Embedded Video Controller will be the primary display even if add-in graphic cards are installed. When set to Disabled, an add-in graphics card will be used as the primary display. BIOS will output displays to both the primary add-in video and the embedded video during POST and pre-boot environment. The embedded video will then be disabled right before the operating system boots. This option is set to Enabled by default. NOTE: When there are multiple add-in graphic cards installed in the system, the first card discovered during PCI enumeration is selected as the primary video. You might have to re-arrange the cards in the slots in order to control which card is the primary video. Current State of Embedded Video Controller SR-IOV Global Enable Internal SD Card Port Internal SD Card Redundancy Displays the current state of the embedded video controller. The Current State of Embedded Video Controller option is a read-only field. If the Embedded Video Controller is the only display capability in the 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 Disabled. Enables or disables the BIOS configuration of Single Root I/O Virtualization (SR-IOV) devices. This option is set to Disabled by default. Enables or disables the Internal SD Card Port of the Internal Dual SD Module (IDSDM). This option is set to On by default. Configures the redundancy mode of the Internal Dual SD Module (IDSDM). When set to Mirror Mode, data is written on both SD cards. After failure of either card and replacement of the failed card, the data of the active card is copied to the offline card during the system boot. 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 OS Watchdog Timer Empty Slot Unhide Memory Mapped I/O above 4 GB Memory Mapped I/O Base When Redundancy is set to Disabled, either one of the SD card can be selected to present itself as mass storage device by setting it to be primary card. By default primary SD card is selected to be SD Card 1. If SD Card 1 is not present, then the controller will select SD Card 2 to be primary SD card. 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 (default), the timer does not have any effect on the system. This option is set to Disabled by default. 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. 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. When set to 12 TB, the system will map MMIO base to 12 TB. Enable this option for an OS that requires 44 bit PCIe addressing. Pre-operating system management applications 31