It is exactly one hundred years ago when the first paper about the development of polarography was published in 1922. Polarography is considered a predecessor of voltammetry. and this iconic electrochemical technique was designed by the Nobel laureate Jaroslav Heyrovsky. In this short review. https://www.roneverhart.com/Western-Digital-Ultrastar-DC-HC550-WUH721816ALE6L0-0F38460-16TB-7-2K-RPM-SATA-6Gb-s-512e-ISE-3-5in-Hard-Drive/