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Rear components overview
PCIe slots
The PCIe slots are on the rear or front of the server, and your server supports up to 12 PCIe slots. For more
information, see "PCIe slots and PCIe adapters" in User Guide or Hardware Maintenance Guide.
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 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
"Power supply LEDs" on page
54.
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 3.2 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.
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.
For more information, see:
•
Set the network connection for the Lenovo XClarity Controller
•
"XCC system management port LEDs" on page 54
.
Chapter 2
Server components
33
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