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Exin Exam CDCS Topic 3 Question 15 Discussion

Actual exam question for Exin's CDCS exam
Question #: 15
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.


Contribute your Thoughts:

Gene
2 months ago
Dust inside the server, huh? That's a classic. Somebody needs to clean out those fans more often. Option A is the way to go!
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Arlyne
2 months ago
I believe the raised floor pressure might also be a factor in this situation.
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Antonio
2 months ago
Hmm, I don't know. Without knowing the CFM/CMH of the air conditioning equipment, it's hard to say for sure what the problem is. Option D seems like the safest bet.
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Olga
1 months ago
User2: The raised floor pressure is too low and/or the raised floor tile % opening is not adequate.
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Cecilia
2 months ago
User1: The exhaust temperature is exceeding the ASHRAE recommended values.
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Elouise
2 months ago
But what about the exhaust temperature being too high?
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Laine
2 months ago
I agree with Ruth, dust can definitely affect heat transfer.
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Lawrence
2 months ago
I'm not so sure. The pressure under the raised floor seems a bit low, and that could be causing issues with air circulation. Option C might be the culprit.
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Diane
2 months ago
User 3: Option C seems like a possible cause then.
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Lenna
2 months ago
User 2: Yeah, that could definitely affect air circulation.
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Desire
2 months ago
User 1: I think the low pressure under the raised floor might be the problem.
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Rosalyn
3 months ago
The exhaust temperature is definitely too high. The ASHRAE guidelines clearly state that the exhaust temperature should not exceed 27°C (81°F). Option B is the correct answer here.
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Bettyann
22 days ago
Twana: Yes, that seems to be the most likely reason.
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Earlean
24 days ago
User 3: So, the cause of the server crashing is the high exhaust temperature?
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Twana
1 months ago
User 2: I agree, the ASHRAE guidelines state it should not exceed 27°C.
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Agustin
1 months ago
User 1: The exhaust temperature is definitely too high.
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Ruth
3 months ago
I think the server is crashing because of dust inside.
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