Lenovo ThinkSystem SR645 Maintenance Manual page 87

Configuration 3 and 4: (front drive bays and rear drive bays)
Front: one 4 x 3.5-inch AnyBay backplane
Rear: one 2 x 2.5-inch SAS/SATA backplane
Con-
Front BP
fig.
NVMe 0–1
NVMe 2–3
3
SAS
NVMe 0–1
NVMe 2–3
4
SAS
The following illustration shows the cable routing for the configuration 4, the routing for configuration 3 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 24. Cable routing for configuration 4
System board
Rear BP
SAS
SAS
↔ ↔ ↔
, , , ...
1 1 2 2 3 3
Storage controller
SFF 8i RAID/HBA
PCIe 3
PCIe 7
PCIe 2
PCIe 5
PCIe 3
PCIe 7
Gen 3: C 0, C 1
↔
n n
.
Chapter 3 Internal cable routing
Gen 4: C 0
77