CFF expander + 8i RAID/HBA adapter

The topic provides cable routing information for the 16 x 2.5" SAS/SATA + 8 x 2.5" NVMe (Gen 4) configuration with one CFF expander and one 8i RAID/HBA adapter.

SAS/SATA cable routing​

Connections between connectors: 1 ↔ 1, 2 ↔ 2, 3 ↔ 3, ... n ↔ n

Figure 1. Cable routing to one CFF expander and one 8i adapter

From	To
1 Backplane 1: SAS	CFF expander C0
2 Backplane 2: SAS	C1
3 CFF expander: RAID/HBA	8i adapter Gen 4: C0 Gen 3: C0C1
4 CFF expander: PWR	Onboard: CFF EXP PWR

NVMe cable routing​

Connections between connectors: 1 ↔ 1, 2 ↔ 2, 3 ↔ 3, ... n ↔ n

Figure 2. Cable routing when two processors installed		Figure 3. Cable routing when one processor installed
From	To	From	To
1 Backplane 3: NVMe 0-1	Onboard: PCIe 8	1 Backplane 3: NVMe 0-1, 2-3	Onboard: PCIe 3, 4
2 Backplane 3: NVMe 2-3	Onboard: PCIe 7	2 Backplane 3: NVMe 4-5	Onboard: PCIe 2
3 Backplane 3: NVMe 4-5, 6-7	Onboard: PCIe 4, 3	3 Backplane 3: NVMe 6-7	Onboard: PCIe 1