Brendan Gregg, an engineer from Sun Microsystems' Fishworks lab, revealed a startling discovery: if you shout at a hard drive, it can cause a sudden spike in its latency. In the video he released, he was monitoring the hard drive's I/O per second (IO/s) and latency using specialized software in a noisy data center. He then shouted directly at a specific location on a RAID JBOD hard drive array. At that moment, a steep, instantaneous peak could be observed. Further examination confirmed that the hard drive which exhibited the change was precisely the one he had shouted at.