Lenovo ThinkSystem SR645 V3 User Manual page 180

Figure 121. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with an 8i or 16i SFF RAID adapter (Gen 3 or Gen 4)
Table 21. Mapping between one front SAS/SATA backplane and an SFF HBA/RAID adapter
Backplane
Front BP (SAS)
Cable routing with a CFF RAID adapter
The following illustration and table show the mapping relationship between backplane connectors and a 16i
CFF RAID adapter (Gen 3 or Gen 4).
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From
SAS 0, SAS 1
1
To
C0
1