Dell EMC D-PEXE-IN-A-00 Dell PowerEdge XE9680 and XE8640 Install Exam Practice Test

Answer : B

For a customer implementing PowerEdge XE9680 servers in a data center with heating and cooling limitations, the NVIDIA A100 GPUs are a suitable choice. Here's a detailed explanation:

GPU Efficiency: The NVIDIA A100 GPUs are known for their energy efficiency, which is crucial in environments with heating and cooling constraints1.

Performance: These GPUs provide excellent performance for CGI production, supporting complex rendering tasks1.

Compatibility: The PowerEdge XE9680 supports a range of powerful GPUs, including the NVIDIA A100, which is designed for AI, machine learning, and high-performance computing tasks1.

Cooling Requirements: The NVIDIA A100 GPUs have a lower thermal design power (TDP) compared to the NVIDIA H100 GPUs, making them more suitable for data centers with limited cooling capabilities1.

By choosing NVIDIA A100 GPUs, the customer can ensure that their PowerEdge XE9680 servers will deliver the required performance for CGI production while adhering to the data center's heating and cooling limitations.

Answer : A

Understanding Rail Locks:

The PowerEdge XE8640 server rails are equipped with a locking mechanism to secure the server during transport and installation. This prevents the server from moving unintentionally and ensures stability.

Identifying the Issue:

When the server stops after being pushed only a short distance into the rack, it is likely due to the rail lock engaging. This lock must be released to allow the server to slide fully into place.

Releasing the Rail Lock:

Locate the rail lock mechanism on the rails. This is typically a lever or button that, when pressed, releases the lock, allowing the server to slide further into the rack.

Detailed Steps:

Align the Server: Ensure that the server is properly aligned with the rails before proceeding. Misalignment can cause the server to get stuck or make it difficult to release the lock.

Press the Release Mechanism: With the server partially inserted, locate and press the release mechanism on both sides of the rails. This should disengage the locks.

Slide the Server: Once the locks are released, carefully push the server into the rack until it is fully seated. Ensure that the server is evenly aligned to avoid binding or getting stuck.

Avoiding Forceful Methods:

Avoid using excessive force to push the server into the rack as it can cause damage to the server, rails, or rack. Additionally, pushing forcefully without releasing the rail lock can lead to misalignment and potential hardware issues.

Safety and Assistance:

Ensure the lift is stable and properly aligned with the rack to prevent movement. If needed, have an assistant stabilize the lift while performing the installation steps.

Reference to Official Documentation:

Refer to the Dell EMC PowerEdge XE8640 Installation and Service Manual for specific instructions and diagrams illustrating the rail lock mechanism and proper installation procedures.

Dell EMC PowerEdge XE8640 Installation and Service Manual: This manual provides detailed guidelines on the proper use of rail kits and the mechanism for releasing rail locks during server installation.

Dell EMC Technical Specifications Guide: Offers comprehensive details on the hardware specifications and installation processes for Dell PowerEdge servers, including rail systems and locking mechanisms.

Answer : A, B

When installing a Cable Management Arm (CMA) on the Dell PowerEdge XE9680 server, there are specific considerations to ensure proper installation and operation:

CMA Orientation:

Installation Flexibility: The CMA for the XE9680 can be installed to open on either the left or right side of the server. This flexibility allows for better management of space within the rack and ensures that the CMA can accommodate the specific layout of your data center (Dell) (Dell).

Cable Routing:

Avoid Routing Optical Cables Through the CMA: Optical cables are typically more sensitive and less flexible compared to other types of cables. Routing them through the CMA can lead to bending, twisting, or other stresses that may damage the cables and affect network performance. Therefore, it is advised not to route optical cables through the CMA (Dell) (Dell).

Installation Process:

Align and Install the CMA: Attach the CMA to the designated mounting points on the server rails. Ensure that it is securely fastened and aligned properly to avoid any issues when extending or retracting the server from the rack.

Organize Cables: Use the provided cable management features to route and secure other cables, ensuring they are not pinched or overly stressed. Avoid including optical cables in the CMA to prevent potential damage.

Post-Installation Checks:

Verify Movement: Ensure that the server can be smoothly extended and retracted with the CMA in place without any cables getting caught or strained.

Secure Connections: Double-check all cable connections to ensure they are secure and functioning correctly.

These steps are crucial for maintaining the integrity and performance of the server and the connected network infrastructure. Proper cable management not only ensures safety but also enhances the reliability and maintainability of the data center setup.

Dell PowerEdge XE9680 Installation and Service Manual (Dell).

Dell XE9680 Rack Rail with Cable Management Arm Information (Dell) (Dell).

Answer : B

The PowerEdge XE9680 server supports a high level of network throughput, which is achieved through its PCIe risers and network PCI card capacity. Here's the detailed information:

PCIe Slots: The PowerEdge XE9680 server supports up to10 PCIe Gen5 slots1. These slots are used to install PCIe devices, including network cards, which are essential for achieving high network throughput.

Riser Cards: Riser cards are used in servers to extend the PCIe slots and make them more accessible for installing additional cards, such as network cards.

Network Card Support: Each riser can support multiple PCIe network cards, allowing for expansion and increased network throughput.

Configuration: For the greatest amount of network throughput, the server can be configured withfour risers, and each riser can accommodatetwo PCIe network cards1. This configuration maximizes the number of network cards and, consequently, the network throughput capability of the server.

By utilizing the full capacity of PCIe slots with the appropriate risers and network cards, the PowerEdge XE9680 can meet the customer's requirement for the highest network throughput possible.

Answer : A

Weight and Size of the PowerEdge XE9680:

The Dell PowerEdge XE9680 server is designed for high performance, which often results in a larger and heavier form factor. Handling such servers typically requires multiple people to ensure safety and prevent damage.

Ergonomic Considerations:

Due to its weight and size, it is crucial to follow proper ergonomic practices when lifting and moving the server. This minimizes the risk of injury and ensures the server is handled safely.

Number of People Required:

For the XE9680, it is recommended to have four people when physically picking up the server to place it on the lift shelf. This recommendation is based on the server's weight and the need to maneuver it safely onto the lift.

Safety and Coordination:

Each person should position themselves on one side of the server, ensuring an even distribution of weight. This coordinated effort helps in lifting the server evenly and reducing the risk of dropping or mishandling it.

Procedure for Lifting:

Two individuals should position themselves at the front corners, and two at the rear corners of the server. On a coordinated count, all four should lift the server together and place it gently onto the lift shelf.

The lift shelf should be stable and able to support the weight of the server once it is placed on it.

Using the Lift:

Once the server is on the lift shelf, it can be maneuvered into the desired position in the rack. Ensure that the lift is rated for the weight of the XE9680 to avoid any mechanical failures.

Reference to Official Documentation:

Dell's installation guides and service manuals typically provide guidelines on the number of personnel required for handling large and heavy servers, ensuring both safety and compliance with best practices.

Dell EMC PowerEdge XE9680 Installation and Service Manual: This manual provides detailed guidelines on handling and installing the XE9680 server, including the recommended number of personnel required for safe handling.

Dell EMC Technical Specifications Guide: Offers insights into the physical dimensions and weight of the PowerEdge XE9680, informing the need for multiple personnel for safe handling and installation.

Answer : D

Redundancy and Load Balancing:

PowerEdge XE8640 servers are designed for high availability and reliability. One key aspect of this design is the redundancy provided by the server's Power Supply Units (PSUs). By connecting each PSU to a different power source, you ensure that the server remains operational even if one power source fails.

Power Source Configuration:

In this scenario, the rack has two distinct power sources: one supplying power to the two left PDUs and the other to the two right PDUs. To maximize redundancy, each PSU should be connected to a different power source.

PSU Placement:

PSU 1 in the left PDUs: Connect PSU 1 to one of the PDUs on the left side of the rack. This ensures that PSU 1 is powered by the first power source.

PSU 2 in the right PDUs: Connect PSU 2 to one of the PDUs on the right side of the rack. This ensures that PSU 2 is powered by the second power source.

Ensuring Redundancy:

By placing PSU 1 on the left and PSU 2 on the right, you create a redundant power configuration. If either power source fails, the other PSU can continue to supply power to the server, maintaining its operation.

Steps for Connection:

Step 1: Verify that the rack's PDUs are correctly connected to their respective power sources.

Step 2: Identify the left and right PDUs based on their power source connections.

Step 3: Connect PSU 1 to a PDU on the left side of the rack.

Step 4: Connect PSU 2 to a PDU on the right side of the rack.

Step 5: Confirm that both PSUs are securely connected and receiving power from separate sources.

Safety and Verification:

Ensure that all connections are secure and that the cables are managed to prevent interference with other components or airflow within the rack. Verify that each PSU is functioning correctly by checking the server's power status indicators.

Dell EMC PowerEdge XE8640 Installation and Service Manual: This manual provides detailed guidelines on PSU connections and power redundancy configurations.

Dell EMC Technical Specifications Guide: Offers comprehensive details on the power requirements and redundancy features of the PowerEdge XE8640.

Answer : B, C, E

To ensure the correct server rails are on-site for the installation of PowerEdge XE servers, it's essential to match the server model with the appropriate rail type. Based on the Dell Enterprise Systems Rail Sizing and Rack Compatibility Matrix, the following matches are correct:

XE9680 and B25: The XE9680 server is compatible with the B25 rail type, which is designed to support the size and weight of this particular server model1.

XE9640 and B25: Similarly, the XE9640 server can also utilize the B25 rail type for secure mounting in a rack1.

XE9680 and B28: Additionally, the XE9680 server is compatible with the B28 rail type, providing an alternative mounting solution1.

It's important to note that the rail types are specific to the server models and are designed to ensure a secure and stable installation in the customer's rack. The Dell Rail Sizing and Rack Compatibility Matrix provides detailed information on the compatibility of different server models with their respective rail types. This document should be consulted to verify the correct rail type for each server model before proceeding with the installation1.