CLI Guide

Legal Values
● Unknown
● None
● Pxe
● Iscsi
Default Value Not Applicable
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
Dependency Not applicable
BIOS.IntegratedDevices.IoatEngine (Read or Write)
Description
Enables or disables the I/O Acceleration Technology (I/OAT). I/OAT is a set of DMA features designed to
accelerate network traffic and lower CPU utilization. This feature should be enabled only if the hardware
and software support I/OAT.
Legal Values
● Enabled
● Disabled
Default Value Not Applicable
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
Dependency Not applicable
BIOS.IntegratedDevices.IoNonPostedPrefetch (Read or Write)
Description
Controls the PCIe throughput by enabling or disabling the PCI IO non-posted prefetch mode. When set
to Enabled, memory reads from PCI devices are optimized. However, performance may be reduced for
writes from PCI devices.
Legal Values
● Enabled
● Disabled
Default Value Not Applicable
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
Dependency Not applicable
BIOS.IntegratedDevices.MemoryMappedIOH (Read or Write)
Description
MMIO base default is 56TB. User should not change the default value unless addressing a known issue.
When set to 12TB, the system will map MMIO base to 12TB. Enable this feature for an OS that requires
44bit PCIe addressing. When set to 512GB, the system will map MMIO base to 512GB, and reduce the
maximum support for memory to less than 512GB. Enable this option only for the 4 GPU DGMA issue.
Legal Values
● 512GB
● 12TB
● 56TB
Default Value Not Applicable
Write Privilege Server Control
License Required iDRAC Express or iDRAC Enterprise
BIOS Attributes 151