Lenovo ThinkSystem SR665 V3 User Manual page 38

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" on page 491.
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 491
Ethernet connectors
Figure 7. OCP module (two connectors) Figure 8. OCP module (four connectors)
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