Petabyte Did You Mean Petabyte?

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     <b>Enter your access ticket</b>
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    <input type="text" size="10" maxlength="10" value="Ticket" name="CODE" onFocus="if (this.form.CODE.value=='Ticket') this.form.CODE.value=''" style="BACKGROUND-COLOR: #E7E7E7; BORDER-BOTTOM: #000080 1px solid; BORDER-LEFT: #000080 1px solid; BORDER-RIGHT: #000080 1px solid; BORDER-TOP: #000080 1px solid; COLOR: #000080; CURSOR: text; FONT-FAMILY: Arial; FONT-SIZE: 10pt; FONT-WEIGHT:bold; LETTER-SPACING: normal; WIDTH:85; TEXT-ALIGN=center;">
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Multiples of bytes as defined by IEC 60027-2
SI prefix			Binary prefixes
Name	Symbol	Multiple	Name	Symbol	Multiple
kilobyte	kB	10³ (or 2¹⁰)	kibibyte	KiB	2¹⁰
megabyte	MB	10⁶ (or 2²⁰)	mebibyte	MiB	2²⁰
gigabyte	GB	10⁹ (or 2³⁰)	gibibyte	GiB	2³⁰
terabyte	TB	10¹² (or 2⁴⁰)	tebibyte	TiB	2⁴⁰
petabyte	PB	10¹⁵ (or 2⁵⁰)	pebibyte	PiB	2⁵⁰
exabyte	EB	10¹⁸ (or 2⁶⁰)	exbibyte	EiB	2⁶⁰
zettabyte	ZB	10²¹ (or 2⁷⁰)
yottabyte	YB	10²⁴ (or 2⁸⁰)

A petabyte (derived from the SI prefix peta/i> ) is a unit of information or computer storage equal to one quadrillion (one long scale billiard) bytes. It is commonly abbreviated PB.

Because of irregularities in using the binary prefix in the definition and usage of the kilobyte, the exact number in common practice could be either one of the following:

1,000,000,000,000,000 bytes — 1000⁵, or 10¹⁵.

1,125,899,906,842,624 bytes — 1024⁵, or 2⁵⁰. This capacity may be expressed unambiguously as a pebibyte.

Petabytes in use

The San Diego Supercomputer Center (SDSC) in the USA has a 1 petabyte hard disk store and a 6 petabyte robotic tape store, both attached to the National Science Foundation's TeraGrid network. (Source: Electronics Weekly, December 11, 2002)

The Internet Archive Wayback Machine contains approximately 1 petabyte of data and is currently growing at a rate of 20 terabytes per month. (Source: Internet Archive FAQ) The Internet Archive also acquired an additional 1.5 petabytes of space on June 22, 2005 1.

NOB Cross media facilities in the Netherlands employs a 1.5 petabyte storage network for the storage of all old and new public television and radio content in digital format. Within the next year, most Dutch public television content will be pulled directly out of this database during broadcast.

Reportedly, Google has between 1.8 and 5 petabytes of storage.

As of 15 October 2005, 3:50pm, all the files being shared on Kazaa total around 54 petabytes.

In the science-fiction TV series Star Trek: The Next Generation, the android Data was built with an ultimate storage capacity of 800 quadrillion bits, or approximately 88 petabytes.

See also

pebibyte

petabit

binary prefix

orders of magnitude (data)

External links

CacheLogic Survey: P2P Accounts for 10 Petabytes of Data

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Petabyte?

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