Lenovo ThinkSystem SR635 V3 - RAID configuration

Figure 207. Cable routing for 6 SAS/SATA drives and 2 AnyBay drives and 2 NVMe front drive bays with an 8i SFF RAID
adapter (Gen 3)
Table 48. Mapping between one front AnyBay backplane and an SFF HBA/RAID adapter
From To
1 SAS 0 and SAS 1 on the front backplane 1 C0 and C1 on the SFF RAID/HBA adapter
278 ThinkSystem SR635 V3 User Guide