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Rear view

The rear of the server provides access to several connectors and components.

Refer to the following rear views for different server models:

Rear view with six PCIe slots

Rear view with six PCIe slots

Rear components overview

PCIe slots

The PCIe slots are on the rear of the server and your server supports up to six PCIe slots on riser 1 and 2 assemblies. For more information, see PCIe slots and PCIe adapters.

Hot-swap drives and drive bays

The drive bays on the front and rear of your server are designed for hot-swap drives. The number of the installed drives in your server varies by model. When you install drives, follow the order of the drive bay numbers.

The EMI integrity and cooling of the server are protected by having all drive bays occupied. Vacant drive bays must be occupied by drive fillers.

Power supply units

The hot-swap redundant power supply units help you avoid significant interruption to the operation of the system when a power supply unit fails. You can purchase a power supply option from Lenovo and install the power supply unit to provide power redundancy without turning off the server.

On each power supply unit, there are three status LEDs near the power cord connector. For information about the LEDs, see Power supply LEDs.

NMI button

Use this button only when you are directed to do so by Lenovo Support. Press this button to force a nonmaskable interrupt (NMI) to the processor. By this way, you can make the operating system halt (such as Windows Blue Screen of Death) and take a memory dump. You might have to use a pen or the end of a straightened paper clip to press the button.

USB 3 (5 Gbps) connectors

The USB 3.1 Gen 1 (5 Gbps) connectors are direct connect interfaces (DCIs) for debugging, which can be used to attach a USB-compatible device, such as a USB keyboard, USB mouse, or USB storage device.

VGA connector

The VGA connectors on the front and rear of the server can be used to attach a high-performance monitor, a direct-drive monitor, or other devices that use a VGA connector.

XCC system management port

The server has a 1 GB RJ-45 connector dedicated to Lenovo XClarity Controller (XCC) functions. Through the system management port, you can access the Lenovo XClarity Controller directly by connecting your laptop to the management port using an Ethernet cable. Make sure that you modify the IP settings on the laptop so that it is on the same network as the server default settings. A dedicated management network provides additional security by physically separating the management network traffic from the production network.

Ethernet connectors

Figure 1. OCP module (two connectors, seen from the rear)
OCP module (two connectors, seen from the rear)

Figure 2. OCP module (four connectors, seen from the rear)
OCP module (four connectors, seen from the rear)

The OCP module provides two or four extra Ethernet connectors for network connections. By default, any of the connectors on the OCP module can function as share management connectors.