A zettabyte (symbol ZB, derived from the SI prefix zetta-) is a unit of information or computer storage equal to one sextillion (one long scale trilliard) bytes.
- 1,000,000,000,000,000,000,000 bytes = 10007 bytes = 1021 bytes
The term “zebibyte” (ZiB), using a binary prefix, is used for the corresponding power of 1024.
Interesting Fact :
Mark Liberman calculated the storage requirements for all human speech ever spoken at 42 zettabytes if digitized as 16 kHz 16-bit audio. This was done in response to a popular expression that states “all words ever spoken by human beings” could be stored in approximately 5 exabytes of data (see exabyte for details). Liberman did “freely confess that maybe the authors [of the exabyte estimate] were thinking about text.”
Remember the good old days when a gigabyte was considered a lot of space? Improvements in hard disk technology have allowed the humble magnetic drive to reach the dizzying heights of multiple terabytes of storage, but Cisco foresees a future that’s a few orders of magnitude more impressive. Pinpointing 2015 as the commencement of what it calls the zettabyte era, the company has put together a handy infographic to show us just how much data can be fit into one: you can alternatively think of it as the equivalent of 250 billion DVDs, 36 million years of HD video, or the volume of the Great Wall of China if you allow an 11oz cup of coffee to represent a gigabyte of data. So “zetta” must be Greek for one hell of a lot, but what Cisco expects is that we’ll be pushing that much information around the web each year by 2015. Any bets on how many exabytes of it will be to stream videos of cats diving into cardboard boxes?
via Visualized: a zettabyte — Engadget.
