http://en.wikipedia.org/wiki/Zettabyte
Zettabyte
From Wikipedia, the free encyclopedia
| Multiples of bytes | ||||
|---|---|---|---|---|
| SI decimal prefixes | Binary usage | IEC binary prefixes | ||
| Name (Symbol) | Value | Name (Symbol) | Value | |
| kilobyte (kB) | 103 | 210 | kibibyte (KiB) | 210 |
| megabyte (MB) | 106 | 220 | mebibyte (MiB) | 220 |
| gigabyte (GB) | 109 | 230 | gibibyte (GiB) | 230 |
| terabyte (TB) | 1012 | 240 | tebibyte (TiB) | 240 |
| petabyte (PB) | 1015 | 250 | pebibyte (PiB) | 250 |
| exabyte (EB) | 1018 | 260 | exbibyte (EiB) | 260 |
| zettabyte (ZB) | 1021 | 270 | zebibyte (ZiB) | 270 |
| yottabyte (YB) | 1024 | 280 | yobibyte (YiB) | 280 |
| See also: Multiples of bits · Orders of magnitude of data | ||||
A zettabyte (symbol ZB, derived from the SI prefix zetta-) is a unit of information orcomputer storage equal to one sextillion (one long scale trilliard) bytes.[1][2][3][4][5]
As of April 2012, no storage system has achieved one zettabyte of information. The combined space of all computer hard drives in the world was estimated at approximately 160 exabytes in 2006.[6] This has increased rapidly however, as Seagate reported selling 330 exabytes worth of hard drives during the 2011 Fiscal Year.[7] As of 2009, the entire World Wide Web was estimated to contain close to 500 exabytes.[8] This is a half zettabyte.
- 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.
[edit]Comparisons for scale
A zettabyte is equal to 1 billion terabytes.
- The world’s technological capacity to receive information through one-way broadcast networks was 0.432 zettabytes of (optimally compressed) information in 1986, 0.715 in 1993, 1.2 in 2000, and 1.9 (optimally compressed) zettabytes in 2007 (this is the informational equivalent to every person on earth receiving 174 newspapers per day).[9][10]
- According to International Data Corporation, the total amount of global data is expected to grow to 2.7 zettabytes during 2012. This is 48% up from 2011.[11]
- 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."[12]
- Research from the University of Southern California reports that in 2007, humankind successfully sent 1.9 zettabytes of information through broadcast technology such as televisions and GPS.[13]
- Research from the University of California, San Diego reports that in 2008, Americans consumed 3.6 zettabytes of information.[14]
[edit]References
- ^ Tom Burton (2008-01-31). "Zettabyte flood predicted for 2015".
- ^ Lucas Mearian (2007-03-06). "A zettabyte by 2010: Corporate data grows fiftyfold in three years". Computerworld.
- ^ Lucas Mearian (2008-03-11). "Study: Digital universe and its impact bigger than we thought". Computerworld.
- ^ "Internet Traffic to Reach a Zettabyte by 2015, Says Study". 2008-01-31.
- ^ Bret Swanson & George Gilder (2008-01-29). "The Impact of Video and Rich Media on the Internet – A ‘zettabyte’ by 2015?". Discovery Institute.
- ^ John F. Gantz (March 2007). "An IDC White Paper: The Expanding Digital Universe" (PDF). EMC.
- ^ Douglas Perry (2011-07-22). "The Average HDD is Now 590 GB in Capacity". Tom's Hardware.
- ^ Richard Wray (2009-05-18). "Internet data heads for 500bn gigabytes". The Guardian.
- ^ Martin Hilbert and Priscila López (2011-02-10). "The World’s Technological Capacity to Store, Communicate, and Compute Information".University of Vermont. Vol. 332 no. 6025 pp. 60-65
- ^ Martin Hilbert (2011-06-11). "World_info_capacity_animation". Youtube.
- ^ "IDC Predicts 2012 Will Be the Year of Mobile and Cloud Platform Wars as IT Vendors Vie for Leadership While the Industry Redefines Itself". IDC. 2011-12-01.
- ^ Mark Liberman (2003-11-03). "Zettascale Linguistics". University of Pennsylvania. Retrieved 2012-07-31.
- ^ Suzanne Wu (2011-02-10). "How Much Information Is There in the World?". University of Southern California.
- ^ Roger E. Bohn & James E. Short (January 2010). "How Much Information? 2009 Report on American Consumers". University of California, San Diego.
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