Yottabyte
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|---|---|---|---|---|
| SI prefixes | Binary prefixes | |||
| Name (Symbol) |
Standard SI |
Alternate Use |
Name (Symbol) |
Value |
| kilobyte (kB) | 103 = 10001 | 210 | kibibyte (KiB) | 210 |
| megabyte (MB) | 106 = 10002 | 220 | mebibyte (MiB) | 220 |
| gigabyte (GB) | 109 = 10003 | 230 | gibibyte (GiB) | 230 |
| terabyte (TB) | 1012 = 10004 | 240 | tebibyte (TiB) | 240 |
| petabyte (PB) | 1015 = 10005 | 250 | pebibyte (PiB) | 250 |
| exabyte (EB) | 1018 = 10006 | 260 | exbibyte (EiB) | 260 |
| zettabyte (ZB) | 1021 = 10007 | 270 | zebibyte (ZiB) | 270 |
| yottabyte (YB) | 1024 = 10008 | 280 | yobibyte (YiB) | 280 |
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. At this time, no computer has one yottabyte of storage.
Because of irregularities in the definition and usage of terms for byte multiples, the exact number can be either one of the following:
- 1 septillion 1,000,000,000,000,000,000,000,000 bytes — 10008, or 1024
- 1,208,925,819,614,629,174,706,176 bytes — 10248, or 280 (the correct term for this measure is "yobibyte". See binary prefix.)
"In ten years, the volume of online data accessible either on the Internet or on corporate networks is expected to approach a yottabyte, or 1 trillion terabytes." —"IBM Unveils Storage Capacity on Demand for Growing e-businesses," Business Wire, October 27, 2000
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