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Noun

rotational latency - (computer science) the time it takes for a specific block of data on a data track to rotate around to the read/write head

computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures

access time - (computer science) the interval between the time data is requested by the system and the time the data is provided by the drive; "access time is the sum of seek time and rotational latency and command processing overhead"

interval, time interval - a definite length of time marked off by two instants

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References in periodicals archive

Random I/O will never occur at throughput levels of sequential I/O since a random I/O involves moving the disk head (seek time), waiting on the disk platter to spin to the right location (rotational latency) in addition to the time required to move the data.

SAS I/O performance: unprecedented flexibility in I/O bandwidth selection

--Lower rotational latency of 20 percent (time it takes disk to get data under the read/write head)

Hitachi mini takes giant leap in notebook hard drives

Rotational latency can also be reduced using out-of-order data delivery, a feature that doesn't require the head to access the starting LBA first.

Supercharging SATA drive performance: Native Command Queuing makes SATA viable in workstation, server applications

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