Supermicro SuperStorage SSG-6049SP-DE1CR60 User Manual page 89

ACS (Access Control Services) Control
Select Enable to program Access Control Services to Chipset PCI-E Root Port Bridges.
Select Disable to program Access Control Services to all PCI-E Root Port Bridges. The
options are Enable and Disable.
Interrupt Remapping
If this feature is set to Enable, I/O DMA transfer remapping and device-generated
interrupts will be supported. The options are Enable and Disable.
PassThrough DMA
Select Enable to use the Non-Isoch VT_D engine pass through DMA (Direct Memory
Access) to enhance system performance. The options are Enable and Disable.
ATS
Select Enable to enable ATS (Address Translation Services) support for the Non-Isoch
VT engine to enhance system performance. The options are Enable and Disable.
Posted Interrupt
Select Enable to support VT_D Posted Interrupt which will allow external interrupts to
be sent directly from a direct-assigned device to a client machine in non-root mode
to improve virtualization efficiency by simplifying interrupt migration and lessening the
need of physical interrupts. The options are Enable and Disable.
Coherency Support (Non-Isoch)
Select Enable for the Non-Iscoh VT-d engine to pass through DMA (Direct Memory
Access) to enhance system performance. The options are Enable and Disable.
Intel® VMD technology

This section describes the configuration settings for the Intel® Volume Management
Device (VMD) Technology.
Note: 1. After you've enabled VMD in the BIOS on a PCI-E slot of your choice, this
PCI-E slot will be dedicated for VMD use only, and it will no longer support any PCI-E
device. To re-activate this slot for PCI-E use, please disable VMD in the BIOS. 2. PCI-E
slots and naming differ depending on the PCI-E devices installed on your motherboard.
Intel® VMD for Volume Management Device on CPU1

Intel® VMD for Volume Management Device for PStack0
Select Enable to use the Intel® Volume Management Device Technology support for
the root port specified by the user. The options are Disable and Enable.
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Chapter 6: UEFI BIOS