| |
| | Computer storage - Wikipedia, the free encyclopedia |
 | | The time taken to access a given byte of information stored on a hard disk is typically a few thousandths of a second, or milliseconds. |
 | | By contrast, the time taken to access a given byte of information stored in random access memory is measured in thousand-millionths of a second, or nanoseconds. |
 | | The relevant unit of measurement is typically nanosecond for primary storage, millisecond for secondary storage, and second for tertiary storage. |
| en.wikipedia.org /wiki/Computer_storage (2615 words) |
|