Server models with eight 3.5-inch simple-swap drives (software RAID)
Use this section to understand the cable routing for server models with eight 3.5-inch simple-swap drives 
(software RAID).
Note: Ensure that all cables are routed through the correct cable clips.
Figure 26. Cable routing for server models with eight 3.5-inch simple-swap drives (software RAID)
Cable
From To
First simple-swap disk drive cable SAS connector on the backplate
1  Backplane 1 power connector on the 
system board
4  SATA 0–3 connector on the system 
board
Second simple-swap disk drive 
cable
SAS connector on the backplate
2  SATA 4–7 connector on the system 
board
3  Backplane 2 power connector on the 
system board
40 ThinkSystem ST250 Setup Guide