Possible causes of drive latency: Harmonics and Noises

Many say that noises, sound waves and sound vibrations are probable causes of network, drive or WAN latency in datacenters. Could this discovery be the definite proof?

Engineering geeks have always suspected that sound waves or noises can affect hard drives (non-repeatable runout or NRRO) but nobody seems to be able to put forward evidences in support of their suspicions. Not anymore, thanks to Brendan Gregg from Sun's Fishworks team!

Brendan has discovered that shouts (possibly noises in the range of 90 to 130 decibels) can cause havoc to hard drives. He discovered it while checking out drive latency in his datacenter that is equipped with one Sun Storage 7410 Unified Storage System. The best thing is that he got everything on video (currently playing down below)! Can we consider this as definite proof that sound waves, sound vibrations or plain noises can cause hard drive, WAN and network latencies?

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