Hardware componentsHardware components This section contains information about each of the components in the chassis and node. Front view The following sections show the controls, LEDs, and connectors on the front of the chassis and node.Rear view The following sections show the rear of the D3 Chassis and SD550 V3 node.Top view This following illustration provides information on the top view of the ThinkSystem SD550 V3 node.Chassis midplane The following illustration shows the location and connectors of the chassis midplane.System-board layout The following sections provide information about the connectors and switches that are available on the system board.System LEDs and diagnostics display The following section provides information on available system LEDs and diagnostics display. Give documentation feedback