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2^50 = 1,125,899,906,842,624 bytes = 1024 terabytes or roughly 10^15 bytes. 1024 petabytes is one exabyte.

Google is estimated to store about 200 petabytes of data in about 25 data centers around the world.

See prefix.
This article is provided by FOLDOC - Free Online Dictionary of Computing (


One quadrillion bytes. Also PB, Pbyte and P-byte. In 2012, Facebook indicated that it stored 100 petabytes of member data. See Petabyte Age, peta, brontobyte, Hadoop, binary values, petabit and space/time.

Hard to Imagine
A large datacenter holds petabytes of data in all of its drives combined. However, we have a long way to go for a single storage drive to hold just one petabyte.

Twenty-Megabyte Hard Disk
In 1984, people were amazed at how much the hard disk on IBM's new PC AT could hold. (Image courtesy of IBM.)
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References in periodicals archive ?
Today, the center supports some 40,000 users engaged in research and training, manages billions of files, and stewards about 7 petabytes of data.
Intel is being a coy about offering specifics on capacity and interface, but it says that slotting Ruler SSDs into a server can get a 1U server to more than 1 petabyte of space.
Powered by Concerto OS 7, the 7700 FSP provides over 1.3 petabytes of effective capacity or serves 20,000 persistent virtual desktops across six shelves, and adds synchronous replication and stretch cluster capabilities to the menu of data protection services.
Up to 224 nodes can be configured, delivering a massive level of storage capacity of up to 56 petabytes. Moreover, nodes can be added without shutting down the system, enabling the capacity of the system to be scaled up in a flexible and timely way as processing levels increase.
The need to store critical digital content and imaging at the petabyte level and beyond can no longer be accomplished with traditional storage solutions.
The other device IBM is working on, which it called simply the "petabyte storage device," would be designed to store data for as long as 50 years without the need for migration to another medium, Hillsberg said.
Petabytes - which are 10-to-the-15th-power bytes, or measures of computer files, hard disk space, and memory - are used today only to measure the storage space of multiple hard drives or collections of data.
One kilobyte equals 1,000 bytes; one megabyte (MB) is 1,000 kilobytes (1 million bytes); one gigabyte (GB) is 1,000 MB (1 billion bytes); one TB is 1,000 GB (1 trillion bytes); one petabyte is 1,000 TB (1 quadrillion bytes).
A petabyte is not [10.sup.15] or 1,000,000,000,000,000 bytes but rather [2.sup.50] or 1,125,899,906,842,624 bytes, a difference of 12 percent.
To begin, the average size of a large data center has grown from hundreds of gigabytes to hundreds of terabytes, and some have grown to over a petabyte. In addition, the number of applications has grown as well.
Oracle Corp announced in December 2003 that it was to test its Database 10g product against LCG, while IBM Corp announced in April 2003 that it was building a 1 petabyte data storage grid to support CERN's LHC efforts.
The volume of e-records the ERA program expects to receive from agencies between 2005 and 2010 is estimated at almost a petabyte of data.