Lenovo ThinkSystem SR250 V2 - Page 58

Ten SATA/SAS drives with two 8i (Hardware RAID/HBA)
From To
1 Backplane: Power connector
System board: Backplane power connector
2 Backplane: SATA signal connector 1 8i: C0
3 Backplane: SATA signal connector 2 8i: C1
4 Backplane: SATA signal connector 3 8i: C0
Figure 42. Ten SATA/SAS drives with two 8i (Hardware RAID/HBA)
50 ThinkSystem SR250 V2 Maintenance Manual