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Sunday, November 11, 2007

Ever heard of an Exabyte?

An exabyte (EB) is a large unit of computer data storage, two to the sixtieth power bytes. The prefix exa means one billion billion, or one quintillion, which is a decimal term. Two to the sixtieth power is actually 1,152,921,504,606,846,976 bytes in decimal, or somewhat over a quintillion (or ten to the eighteenth power) bytes. It is common to say that an exabyte is approximately one quintillion bytes. In decimal terms, an exabyte is a billion gigabytes.

1 Exabyte=10^18 bytes

How Many Bytes for Anything
Much of the following table is derived from figures calculated by Roy Williams on his page called "Powers of Ten."

Information object How many bytes
A binary decision 1 bit
A single text character 1 byte
A typical text word 10 bytes
A typewritten page 2 kilobyte s ( KB s)
A low-resolution photograph 100 kilobytes
A short novel 1 megabyte ( MB )
The contents of a 3.5 inch floppy disk 1.44 megabytes
A high-resolution photograph 2 megabytes
The complete works of Shakespeare 5 megabytes
A minute of high-fidelity sound 10 megabytes
One meter (or close to a yard) of shelved books 100 megabytes
The contents of a CD-ROM 500 megabytes
A pickup truck filled with books 1 gigabyte GB )
The contents of a DVD 17 gigabyte s
A collection of the works of Beethoven 20 gigabytes
A library floor of academic journals 100 gigabytes
50,000 trees made into paper and printed 1 terabyte ( TB )
An academic research library 2 terabytes
The print collections of the U.S. Library of Congress 10 terabytes
The National Climactic Data Center database 400 terabytes
Three years' of EOS data (2001) 1 petabyte ( PB )
All U.S. academic research libraries 2 petabytes
All hard disk capacity developed in 1995 20 petabytes
All printed material in the world 200 petabytes
Total volume of information generated in 1999 2 exabyte s ( EB s)
All words ever spoken by human beings 5 exabytes

How Much Information Exists
Since 2000, researchers at the University of California, Berkeley, have continued to estimate each year how much information exists on the planet Earth. The Executive Summary of their report, "How Much Information? 2003" is available at their Web site. Here are just a few highlights:
Information object How many bytes
How much information each person on earth produces per year 1 to 2 exabyte s
How much of the above is printed information .03% of the total
How much e-mail information per year 11,265 terabyte s
How much radio information 788 terabytes
How much TV information 14,150 terabytes
How much telephone information 576,000 terabytes
How much postal information 150,000 terabytes
How much office document information 195 terabytes


Danny said...

Awesome read man.
There is a hosting comp in Malaysia who call them self exabyte :)