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Rear view

The rear view of the server varies by model. Depending on the model, your server might look slightly different from the illustrations in this topic.

Server model with three PCIe slots

The following illustration shows the rear view of server model with three PCIe slots. Depending on the model, your server might look slightly different from the illustration below.

Rear view of server model with three PCIe slots

Table 1. Components on the rear of the server
CalloutCallout
1 PCIe slot 1 on riser 1 assembly2 PCIe slot 2 on riser 1 assembly
3 PCIe slot 3 on riser 2 assembly4 Power supply 2 (optional)
5 Power supply 16 NMI button
7 USB 3.1 Gen 1 connectors (3)8 VGA connector
9 XClarity Controller network connector10 Ethernet connectors on OCP 3.0 Ethernet adapter (optional)
Note
For more information about each component, see Rear components overview.

Server model with two PCIe slots

The following illustration shows the rear view of the server model with two PCIe slots. Depending on the model, your server might look slightly different from the illustration below.

Rear view of server model with two PCIe slots

Table 2. Components on the rear of the server
CalloutCallout
1 PCIe slot 1 on riser 1 assembly2 PCIe slot 2 on riser 1 assembly
3 Power supply 2 (optional)4 Power supply 1
5 NMI button6 USB 3.1 Gen 1 connectors (3)
7 VGA connector8 XClarity Controller network connector
9 Ethernet connectors on OCP 3.0 Ethernet adapter (optional) 
Note
For more information about each component, see Rear components overview.

Server model with two 2.5-inch hot-swap rear drive bays and one PCIe slot

The following illustration shows the rear view of the server model with two hot-swap drive bays and one PCIe slot. Depending on the model, your server might look slightly different from the illustration below.

Rear view of server model with two 2.5-inch hot-swap rear drive bays and one PCIe slot

Table 3. Components on the rear of the server
1 PCIe slot 1 on riser 1 assembly2 Rear 2.5-inch drive bays (2)
3 Power supply 2 (optional)4 Power supply 1
5 NMI button6 USB 3.1 Gen 1 connectors (3)
7 VGA connector8 XClarity Controller network connector
9 Ethernet connectors on OCP 3.0 Ethernet adapter (optional) 
Note
For more information about each component, see Rear components overview.

Server model with two 7mm hot-swap rear drive bays and two PCIe slots

The following illustration shows the rear view of the server model with two 7mm hot-swap rear drive bays and two PCIe slots. Depending on the model, your server might look slightly different from the illustration below.

Rear view of server model with two 7mm hot-swap rear drive bays and two PCIe slots

Table 4. Components on the rear of the server
1 PCIe slot 1 on riser 1 assembly2 PCIe slot 2 on riser 1 assembly
3 Rear 7mm drive bays (2)4 Power supply 2 (optional)
5 Power supply 16 NMI button
7 USB 3.1 Gen 1 connectors ((3 DCIs)8 VGA connector
9 XClarity Controller network connector10 Ethernet connectors on OCP 3.0 Ethernet adapter (optional, two or four connectors may be available)
Note
For more information about each component, see Rear components overview.

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
Drive LEDs

Drive LEDStatusDescription
1 Drive status LED (right)Solid yellowThe drive has an error.
Blinking yellow (blinking slowly, about one flash per second)The drive is being rebuilt.
Blinking yellow (blinking rapidly, about four flashes per second)The RAID adapter is locating the drive.
2 Drive activity LED (left)Solid greenThe drive is powered but not active.
Blinking greenThe drive is active.

Ethernet connectors

Figure 2. OCP module (two connectors)
OCP module (two connectors)

Figure 3. OCP module (four connectors)
OCP module (four connectors)

Note
  • 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.

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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

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 three PCIe slots on riser 1 and 2 assemblies.

Power supply units

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 3.1 Gen 1 connectors

The USB 3.1 Gen 1 connectors 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).