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Question 1 - D-PEXE-IN-A-00 discussion

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A deployment engineer is installing a PowerEdge XE8640 server. The rack has four PDUs. Looking at the rear of the rack, one power source provides power to the two left PDUs. A different power source provides power to the two right PDUs.

What side of the rack should XE8640 PSU 1 and PSU 2 be connected?

A.
PSU 2 in the left and PSU 1 in the right
Answers
A.
PSU 2 in the left and PSU 1 in the right
B.
PSU 1 and PSU 2 in the left PDUs
Answers
B.
PSU 1 and PSU 2 in the left PDUs
C.
PSU 1 and PSU 2 in the right PDUs
Answers
C.
PSU 1 and PSU 2 in the right PDUs
D.
PSU 1 in the left and PSU 2 in the right
Answers
D.
PSU 1 in the left and PSU 2 in the right
Suggested answer: D

Explanation:

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.

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asked 16/09/2024
Dasaret Tillman
40 questions
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