n. Computer Science.
The average time lag between a request for information stored on a particular component, such as the hard drive or RAM, and its delivery.
| Dictionary: access time |
The average time lag between a request for information stored on a particular component, such as the hard drive or RAM, and its delivery.
| Business Dictionary: Access Time |
1. Time taken by a computer or automated typewriter to locate data or an instruction word in its memory (storage) and transfer it.
2. Time taken to transfer information from a computer or automated typewriter to the location in that device where it will be stored.
| Wikipedia: Access time |
| It has been suggested that Process switching latency and Thread switching latency be merged into this article or section. (Discuss) |
Access time is the time delay or latency between a request to an electronic system, and the access being completed or the requested data returned.
Theoretical averages of the access time or latency are shown in the table below, based on the empirical relation that the average latency in milliseconds for such a drive is about 30000/RPM:
Seek time: This is the amount of time between when the CPU requests a file and when the first byte of the file is sent to CPU. Times between 10 to 20 milliseconds are common.
| Spindle RPM | Average latency (ms) |
|---|---|
| 4200 | 7.14 |
| 5400 | 5.55 |
| 7200 | 4.17 |
| 10000 | 3 |
| 15000 | 2 |
This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C" (in support of MIL-STD-188).
This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
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![]() | Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved. Read more | |
![]() | Business Dictionary. Dictionary of Business Terms. Copyright © 2000 by Barron's Educational Series, Inc. All rights reserved. Read more | |
![]() | Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Access time". Read more |
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