Lenovo ThinkSystem SR645 Setup Manual page 76

Configuration 1 and 2: (front drive bays only)
Front: one 4 x 3.5-inch AnyBay backplane
Con-
Front BP
fig.
NVMe 0–1
1 NVMe 2–3
SAS
NVMe 0–1
NVMe 2–3
2
SAS
The following illustration shows the cable routing for the configuration 2, the routing for configuration 1 is
similar. Connections between connectors:
Note: For models that support Gen 3 and Gen4 adapters at the same slot, the illustration shows only the
cable routing information for Gen 4 adapters, the routing and connector information is similar for Gen 3
adapters.
Figure 21. Cable routing for configuration 2
ThinkSystem SR645 Setup Guide
72
System board
PCIe 3
PCIe 7
PCIe 2
PCIe 3
PCIe 7
↔ ↔ ↔
, , , ...
1 1 2 2 3 3
Storage controller
SFF 8i RAID/HBA
Gen 4: C 0
Gen 3: C 0, C 1
↔
n n