Shouting at Disks

Recently, I wrote about a Janet Jackson song that could cause laptops to crash. That turned out to involve frequencies from the song that resonated with a critical frequency in the disk subsystem and was solved simply by installing a filter to damp out the offending frequency.

Right after I published that story, I stumbled upon a video from 14 years ago of someone shouting at a disk array. It didn’t cause a crash but monitoring software clearly showed that disk latency went up when the disk was shouted at.

The engineers doing the demonstration explained this as having to do with vibration so perhaps it’s different from the Janet Jackson menace but it’s surprising how unexpected things can affect disk performance.

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