Dell PowerEdge R520 Technical Manual page 10

The Dell PowerEdge R520 is a 2U, 2-socket rack server. For additional system views and features,
Dell PowerEdge R520 Systems Owner's Manual
see the on Support.Dell.com/Manuals.
Figure 1 shows the features on the front of the R520 chassis including eight 3.5-inch hard drives,
front control panel, USB connectors, and many other components and features described in this
guide.
Figure 2 shows the optional lockable bezel on the front of the R520 chassis.