Lenovo ThinkSystem SR630 V3 User Manual page 310

Figure 264. Cable routing for onboard configuration of 4 x 3.5-inch front SAS/SATA drive bays with 2 x 2.5 rear SAS/
SATA drives
Table 59. Mapping between one front SAS/SATA backplane with one rear SAS/SATA backplane and processor board for
onboard configuration
Backplane
Front BP (SAS)
1
Rear BP (SAS)
2
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From
SAS (front)
SAS (rear)
To
SATA 0
SATA 2