Kryder's Law

Contributor(s): Sarah Wilson

Kryder's Law is the assumption that disk drive density, also known as areal density, will double every thirteen months. The implication of Kryder's Law is that as areal density improves, storage will become cheaper.

The term stems from a 2005 article published in Scientific American titled "Kryder's Law," which featured an interview with Mark Kryder, former senior vice president of research and chief technology officer of Seagate Corporation. Kryder's Law is often compared to Moore's Law and is sometimes referred to as the "Moore's Law of storage." (Moore's Law proposed that the number of microcomponents that could be placed in an integrated circuit would double every year.)

Many analysts argue that while the general trend of disk density increasing exponentially holds true, Kryder's Law is a sweeping generalization that cannot be applied to all segments of the storage market and will not hold up as storage technology evolves. Instead, Kryder's Law -- like Moore's Law -- should be viewed as a snapshot of a technology's evolution at a specific point of time.



This was last updated in December 2014

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If areal density does slow down, will big data and data science initiatives become cost-prohibitive?
Oh, interesting. I'd certainly heard the state before but I hadn't heard of it being a specific law attributed to a specific guy. I'm going to have to remember that term. Thanks!
I've heard of Moore's Law, but this is a new one for me. I do have to say, as one who well remembers the prospect of spending nearly $2,000 to buy a 4GB SCSI drive in 1993, the ability to get a USB stick with the same capacity for less than $10 is mind-blowing and wonderful.