| 词条 | Yottabyte |
| 释义 |
The yottabyte is a multiple of the unit byte for digital information. The prefix yotta indicates multiplication by the eighth power of 1000 or 1024 in the International System of Units (SI), and therefore one yottabyte is one septillion (one long scale quadrillion) bytes. The unit symbol for the yottabyte is YB. 1 YB = {{gaps|10008|bytes}} = {{gaps|1024|bytes}} = {{gaps|1|000|000|000|000|000|000|000|000|bytes}} = {{gaps|1000|zettabytes}} = {{gaps|1|trillion|terabytes}} A related unit, the yobibyte (YiB), using a binary prefix, is equal to {{gaps|10248|bytes}} (approximately 1.209 YB). ExamplesIn 2010, it was estimated that storing a yottabyte on terabyte-size disk drives would require one million city block-size data-centers, as big as the states of Delaware and Rhode Island combined.[1] By late 2016 memory density had increased to the point where a yottabyte could be stored on SD cards occupying roughly twice the size of the Hindenburg.[2] With recently demonstrated technology using DNA computing for storage, one yottabyte of capacity would require a volume between 0.003 and 1 cubic meter, depending on number of redundant backup copies desired and the storage density: "Our genetic code packs billions of gigabytes into a single gram".[3] DNA is much more advanced technology than microSDXC cards (for this application) and accompanied by uncertain costs, but this suggests potential information density.[4] The total amount of data that could be stored in the observable universe using each of the 1078 to 1082 atoms as single bits of information (using their spin for example) is between 1.25×1053 to 1.25×1057 yottabytes.[5] It would take up to 1.47×1064 years (over one million trillion trillion trillion trillion times the current age of the universe) for a single Samsung 970 pro SSD to write such an amount of data.[6] See also
References1. ^{{cite web|title=The One Hundred Trillion Dollars Hard Drive|publisher=Gizmodo | url=https://gizmodo.com/5557676/how-much-money-would-a-yottabyte-hard-drive-cost | date=7 Jun 2010| first=Jesus |last=Diaz | accessdate=7 March 2013}} {{Computer Storage Volumes}}2. ^{{cite web |url=https://www.mymemory.co.uk/SDXC/Lexar/Lexar-512GB-Professional-633x-SDXC-Card-UHS-I-U3---95MB_s |title=Archived copy |accessdate=2017-01-20 |deadurl=yes |archiveurl=https://web.archive.org/web/20170202012335/https://www.mymemory.co.uk/SDXC/Lexar/Lexar-512GB-Professional-633x-SDXC-Card-UHS-I-U3---95MB_s |archivedate=2017-02-02 |df= }} 3. ^{{cite web| title=DNA: The Ultimate Hard Drive | date= August 16, 2012 | url=http://news.sciencemag.org/math/2012/08/dna-ultimate-hard-drive}} 4. ^{{cite web|date=August 17, 2012 |title=Yottabyte DNA. Database of the New Age |url=http://girlmeetswhiskey.com/tag/yottabyte/ |deadurl=yes |archiveurl=https://web.archive.org/web/20140110113534/http://girlmeetswhiskey.com/tag/yottabyte/ |archivedate=January 10, 2014 }} 5. ^{{Cite web|url=https://www.universetoday.com/36302/atoms-in-the-universe/|title=How Many Atoms Are There in the Universe?|last=Villanueva|first=John Carl|date=2009-07-30|website=Universe Today|language=en-US|access-date=2019-03-12}} 6. ^{{Cite web|url=http://www.guru3d.com/articles_pages/samsung_970_pro_m_2_512gb_nvme_ssd_review,1.html|title=Samsung 970 PRO M.2 512GB NVMe SSD review|website=Guru3D.com|language=en-us|access-date=2019-03-12}} 1 : Units of information |
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