Rear view

• Rear view with eight PCIe slots

• Rear view with four 2.5-inch rear drive bays and six PCIe slots

• Rear view with eight 2.5-inch rear drive bays and four PCIe slots

• Rear view with two 3.5-inch rear drive bays and four PCIe slots

• Rear view with four 3.5-inch rear drive bays and two PCIe slots

Rear view with eight PCIe slots​

Rear view with four 2.5-inch rear drive bays and six PCIe slots​

Rear view with eight 2.5-inch rear drive bays and four PCIe slots​

Rear view with two 3.5-inch rear drive bays and four PCIe slots​

Rear view with four 3.5-inch rear drive bays and two PCIe slots​

Rear components overview​

Drive LEDs​

Each hot-swap drive comes with an activity LED and status LED and the signals are controlled by the backplanes. Different colors and speeds indicate different activities or status of the drive. The following illustration shows the LEDs on a Hard disk drive or solid–state drive.

Figure 1. Drive LEDs

Ethernet connectors​

Figure 2. OCP 3.0 Ethernet adapter (two connectors, seen from the rear)

Figure 3. OCP 3.0 Ethernet adapter (four connectors, seen from the rear)

The OCP 3.0 Ethernet adapter provides two or four extra Ethernet connectors for network connections.

By default, Ethernet connector 1 (the first port starting from the left in the rear server view) on the OCP 3.0 Ethernet adapter can also function as a management connector using the shared management capacity. If the shared management connector fails, traffic can automatically switch over to another connector on the adapter.

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.

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.

PCIe slots​

The PCIe slots are on the rear of the server and your server supports up to eight PCIe slots on riser 1, 2, and 3 assemblies. For more information, see PCIe slots and PCIe adapters.

Power supplies​

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

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

USB 3 (5 Gbps) connectors​

The USB 3.2 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.

XClarity Controller network connector​

The XClarity Controller network connector can be used to attach an Ethernet cable to manage the baseboard management controller (BMC).