M.2 backplane to SFF/CFF RAID adapters
See this section to understand the cable routing between an M.2 drive backplane and an SFF/CFF RAID adapter.
Figure 1. M.2 backplane to a Gen 3/4 SFF RAID adapter  | Figure 2. M.2 backplane to a Gen 3/4 CFF RAID adapter  | ||
| From | To | From | To |
| 1 M.2 power | 1 M.2 power | 1 M.2 power | 1 M.2 power |
| 2 M.2 PCIe | 2 SFF C0 | 2 M.2 PCIe | 2 CFF C0 |
| 3 MB input | 3–1 PCIe 4 (two processors) | ||
| 3–2 PCIe 2 (one processor) | |||
Note
When the server is installed with 4 x 2.5'' NVMe drives with two processors, the “MB input” connector on the CFF RAID adapters connects to PCIe 2 on the processor board.
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