Intel® Server Board S2600WF Product Family Technical Product Specification
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6.3.2
Onboard PCIe* OCuLink Connectors
Depending on the model of the server board installed, the server board has two (S2600WFQ) or four
(S2600WFO and S2600WFT) PCIe OCuLink connectors to provide the PCIe interface for NVMe SSDs
installed to the front hot swap backplane. PCIe signals for OCuLink connectors “PCIe_SSD0” and
“PCIe_SSD1” are routed directly from CPU_1 and PCIe signals for OCuLink connectors “PCIe_SSD2” and
“PCIe_SSD3” are directly routed from CPU_2. See Chapter 7 for OCuLink connector pin-out definition.
Figure 37. Onboard OCuLink connectors
6.3.3
Intel® Volume Management Device (Intel® VMD) for NVMe*
Intel® Volume Management Device (Intel® VMD) is hardware logic inside the processor root complex to help
manage PCIe NVMe SSDs. It provides robust hot plus support and status LED management. This allows
servicing of storage system NVMe SSD media without fear of system crashes or hangs when ejecting or
inserting NVMe SSD devices on the PCIe bus.
Figure 38. NVMe* storage bus event/error handling
Intel VMD handles the physical management of NVMe storage devices as a standalone function but can be
enhanced when Intel VROC support options are enabled to implement RAID based storage systems.
PCIe SSD1
(CPU 1)
PCIe SSD0
(CPU 1)
PCIe SSD3
(CPU 2)
PCIe SSD2
(CPU 2)
Storage bus event/error handled by
BIOS or OS
.
NVMe* Support w/o Intel® VMD
NVMe* driver
PCIe*
NVMe*
SSDs
OS PCI bus driver
Storage bus event/error handled by
storage driver
.
Intel® VMD-enabled
NVMe* driver
OS PCI bus driver
PCIe*
NVMe*
SSDs
Processor
NVMe* Storage with Intel® VMD
Intel® VMD
