Configuration 2: Direct Connectivity to 8-16 NVMe SSDs with (No External PCIe Switch)
For direct connectivity to 8-16 SSDs configuration, the first BlueField PCIe Gen 4.0 x16 inter- face is routed through the x16 PCIe Gen 3.0/4.0 Edge
Connector towards the first group of four x4 SSDs or eight x2 SSDs. The second BlueField PCIe Gen 4.0 x16 interface is routed through the x16 PCIe Gen 3.0
only CABLINE-CA II PLUS connector towards the second group of four x4 SSDs or eight x2 SSDs.
The control signals for the each NVMe SSDs is routed through a serialized bus that is connected from the BlueField to the CPLD and further-on towards the
PCIe edge connector and the CABLINE-CA IIPlus harness. The control signals are separated inside the CPLD to the appropriate groups to match each NVMe
SSD backplane.
The user should implement a CPLD expender on each of its NVMe SSDs backplanes and expand the various control signals towards each of the 4-8 SSDs.
The BlueField and the NVMe SSDs are implementing separate clock schemes, thus the user should drive the 100Mhz reference clock for the SSDs from its
own clock source.
See the below figurefor an illustration of the 8-16 NVMe SSDs configuration.
To Next Page
Loading...
Need help?
General
