Rotational latency:
Also called rotational delay, the amount of time it takes for the desired sector of a disk
Transfer rate:
time required to move the data electronically from the disk to the computer.
Seek time:
The total amount of time required for information on a disk drive to be found.
For disk drives, the terms seek time and access time are often used interchangeably.
Examples of common hard drive seeks times are 8ms and 10ms.
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