Lenovo ThinkSystem SR550 Product Manual page 5

The following figure shows the front of the SR550 server with up to 16x 2.5-inch drive bays.
Figure 4. Front view of the SR550: Up to 16x 2.5-inch drive bays
The following figure shows the rear of the SR550 server.
Figure 5. Rear view of the SR550
Lenovo ThinkSystem SR550 Server 5