Lenovo ThinkSystem SR635 V3 User Manual page 260

Cable routing with an SFF HBA/RAID adapter
The following figure shows the mapping relationship between backplane connectors and system board
assembly/adapter connectors when an 8i SFF HBA/RAID adapter (Gen 3 or Gen 4) is installed.
Note: Gen 3 and Gen 4 SFF RAID/HBA adapters are slightly different in their connectors, but the connection
method is similar. The following illustration takes Gen 4 SFF RAID/HBA adapters as an example.
Figure 188. Cable routing for 4 x 2.5-inch front SAS/SATA drive bays with an 8i SFF RAID adapter (Gen 3/ Gen 4)
Table 29. Mapping between backplane connectors and system board assembly/adapter connectors when an 8i SFF
HBA/RAID adapter is installed
From To
SAS on the front backplane C0 on the SFF HBA/RAID adapter
1 1
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