rotational latency
Computing Dictionary

rotational latency definition

storage, hardware
The time for the start of the required sector on a disk to appear underneath the read/write head. The worst case is where it has just passed the head when the request is received. For a disk drive with N heads per surface, rotating at R revolutions per minute, the average rotational latency will be
L = 30/NR seconds.
Rotational latency is one component of access time.
(2009-11-06)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Rotational latency is always a great word to know.
So is ort. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a scrap or morsel of food left at a meal.
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WordNet
rotational latency

noun
(computer science) the time it takes for a specific block of data on a data track to rotate around to the read/write head 
WordNet® 3.0, © 2006 by Princeton University.
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