Lenovo ThinkSystem D4390 Hardware Installation And Maintenance Manual page 5

Acoustic Noise Emissions, Declared Sound Power Level measured in accordance with ISO 7779 and results
reported per ISO 9296.
Cooling Specification
The thermal solution supports drive up to 13W maximum power dissipation per drive slot.
The system shall continue to function normally when the following conditions are met.
●
Fan failure:
The System will function normally when one of two fans in the fan module fails.
The maximum time for fan module replacement should not exceed 10 minutes.
●
Drive failure:
The cooling system will ensure that the system continues while the top cover is removed for drive failure.
The maximum time for drive replacement should not exceed 10 minutes.
●
PSU failure:
The maximum time for PSU replacement should not exceed 10 minutes.
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