Yottabyte


"YB" redirects here. For other uses, see Yb.
Prefixes for bit and byte multiples
Decimal
Value SI
1000 k kilo
10002 M mega
10003 G giga
10004 T tera
10005 P peta
10006 E exa
10007 Z zetta
10008 Y yotta
Binary
Value IEC JEDEC
1024 Ki kibi K kilo
10242 Mi mebi M mega
10243 Gi gibi G giga
10244 Ti tebi
10245 Pi pebi
10246 Ei exbi
10247 Zi zebi
10248 Yi yobi

A yottabyte (derived from the SI prefix yotta-) is a unit of information or computer storage equal to one septillion (one long scale quadrillion or 1024) bytes. It is commonly abbreviated YB. As of 2009, no computer has yet achieved one yottabyte of storage. In fact, the combined space of all the computer hard drives in the world does not amount to even one zettabyte. According to one study, all the world's computers stored approximately 160 exabytes in 2006.[1] When used with byte multiples, the SI prefix indicates a power of 1,000:

  • 1 septillion, or 1,000,000,000,000,000,000,000,000 bytes — 10008, or 1024

The term "yobibyte", using a binary prefix, is used for multiples of 1024.

References

  1. ^ Expanding Digital Universe IDC White Paper (pdf)






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