Lenovo ThinkSystem SR635 V3 - Page 230

2 NVMe 0–1
3 Power
Figure 161. 4 x 2.5-inch AnyBay backplane
1 NVMe 2–3
2 Power
3 NVMe 0–1
4 SAS
16 x EDSFF backplane
See this section to locate the connectors on the 16 x EDSFF drive backplane.
1 EDSFF 0–1
2 EDSFF 2–3
3 EDSFF 4–5
4 EDSFF 6–7
5 Power
6 EDSFF 8–9
7 EDSFF 10–11
8 EDSFF 12–13
9 EDSFF 14–15
Rear 7mm SAS/SATA/NVMe backplane
See this section to locate the connectors on the rear 7mm drive backplane.
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ThinkSystem SR635 V3 User Guide