Gigabytes, Terabytes, And Petabytes Hard Drives

Bigger Is Better For The World Of Hard Disk Drives

I remember when I thought a 20 megabyte drive was a large size drive. Then when the gigabyte drives came out, and we all said, "Wow!" Now the terabyte drives are here, for personal computers. Here comes the terabyte hard drive | Tech News on ZDNet

Amazing, and the storage keeps growing! What's next, the Googolbyte?

v • d • e Quantities of bytes
SI prefixes			Binary prefixes (IEC 60027-2)
Name (Symbol)	Popular Usage	Standard SI	Name (Symbol)	Value
kilobyte (kB)	210	103	kibibyte (KiB)	210
megabyte (MB)	220	106	mebibyte (MiB)	220
gigabyte (GB)	230	109	gibibyte (GiB)	230
terabyte (TB)	240	1012	tebibyte (TiB)	240
petabyte (PB)	250	1015	pebibyte (PiB)	250
exabyte (EB)	260	1018	exbibyte (EiB)	260
zettabyte (ZB)	270	1021	zebibyte (ZiB)	270
yottabyte (YB)	280	1024	yobibyte (YiB)	280

An exabyte (derived from the SI prefix exa-) is a unit of information or computer storage equal to approximately one quintillion bytes. It is commonly abbreviated EB. From Wikipedia.

University of Berkeley, How Much Information? 2003 Executive Summary

1. Print, film, magnetic, and optical storage media produced about 5 exabytes of new information in 2002. Ninety-two percent of the new information was stored on magnetic media, mostly in hard disks.
• How big is five exabytes? If digitized with full formatting, the seventeen million books in the Library of Congress contain about 136 terabytes of information; five exabytes of information is equivalent in size to the information contained in 37,000 new libraries the size of the Library of Congress book collections.
• Hard disks store most new information. Ninety-two percent of new information is stored on magnetic media, primarily hard disks. Film represents 7% of the total, paper 0.01%, and optical media 0.002%.
• The United States produces about 40% of the world's new stored information, including 33% of the world's new printed information, 30% of the world's new film titles, 40% of the world's information stored on optical media, and about 50% of the information stored on magnetic media.
• How much new information per person? According to the Population Reference Bureau, the world population is 6.3 billion, thus almost 800 MB of recorded information is produced per person each year. It would take about 30 feet of books to store the equivalent of 800 MB of information on paper.

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