Lenovo ThinkSystem SR635 V3 User Manual page 270

Figure 195. Cable routing for 8 x 2.5-inch front SAS/SATA drive bays with an 8i or 16i SFF RAID adapter (Gen 3)
Table 36. Mapping between one 8 x 2.5-inch front SAS/SATA backplane and an SFF HBA/RAID adapter
From To
SAS 0 and SAS 1 on the front backplane C0 and C1 on the SFF HBA/RAID adapter
1 1
Cable routing with a CFF HBA/RAID adapter
For power and input connections of CFF RAID/HBA adapters, refer to "CFF RAID/HBA adapter" on page
222.
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