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Exin Exam CDCS Topic 3 Question 4 Discussion

Actual exam question for Exin's CDCS exam
Question #: 4
Topic #: 3
[All CDCS Questions]

A 5kW (power consumption) server keeps crashing with the message 'temperature too high'.

The intake temperature is measured at 25 C/77 F and a relative humidity (RH) level of 50%.

The exhaust temperature is 29 C/84 F and 45% RH.

The raised floor is providing an adequate amount of CFM/CMH at a reasonable velocity.

The pressure under the raised floor is approximately 25 Pa/0.1 inch HO.

Analyze the situation and indicate what the most likely cause is for this server to crash.

Show Suggested Answer Hide Answer
Suggested Answer: A

The server's repeated overheating despite adequate intake and exhaust temperatures suggests that dust buildup inside the server may be impeding heat transfer. Dust accumulation can obstruct airflow within the server, insulate components, and disrupt the convection-based cooling systems that regulate internal temperatures, leading to overheating and potential hardware failures.

Detailed Explanation:

While the intake and exhaust temperatures appear within acceptable ranges, internal dust can reduce airflow and impede cooling efficiency, causing internal components to overheat despite seemingly normal ambient conditions. Regular cleaning and maintenance are critical for preventing dust-related issues, especially in high-powered equipment like a 5kW server.

EPI Data Center Specialist References:

EPI emphasizes regular maintenance to prevent dust buildup in data center equipment. Dust can significantly impact cooling efficiency and lead to overheating, which underlines the importance of routine cleaning for optimal server performance.


by Joesph at Oct 19, 2024, 12:34 AM

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Carmen
21 days ago
The pressure is good, the temperatures are within range, and the air conditioning is working. Sounds like a job for the local dust bunny whisperer to me!
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Annamae
2 days ago
A) Dust inside the server causing issues with convection-based heat transfer
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Emily
26 days ago
Hmm, the pressure under the raised floor seems adequate, and the air conditioning equipment is doing its job. I'd say the dust buildup is the most likely cause. Time for some server spring cleaning!
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Alton
30 days ago
ASHRAE recommends keeping the exhaust temperature below 27°C, and this one is at 29°C. That's the likely culprit here. Time to clean those air filters!
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Amie
1 months ago
The exhaust temperature is a bit high, but the pressure under the raised floor looks good. I think the issue might be with the dust buildup inside the server causing poor heat transfer.
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Makeda
4 days ago
C) The raised floor pressure is too low and/or the raised floor tile % opening is not adequate
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Shawnda
6 days ago
B) The exhaust temperature is exceeding the ASHRAE recommended values
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Stefany
22 days ago
A) Dust inside the server causing issues with convection-based heat transfer
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Chery
2 months ago
But what about the exhaust temperature? Could that be a factor too?
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Romana
2 months ago
I agree with Lorean, dust can definitely cause issues with heat transfer.
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Lorean
2 months ago
I think the server is crashing because of dust inside.
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