# What defines the time taken to position the sector on the platter under the read/write head?

What defines the time taken to position the sector on the platter under the read/write head?

A.
Rotational delay

B.
Seek time

C.
Response time

D.
Data transfer rate

## 10 Comments on “What defines the time taken to position the sector on the platter under the read/write head?”

1. chuck says:

nope its “A”
“The amount of time that a disk drive’s head takes to move to a specific location on a disk” is the definition of seek time

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1. random says:

nope it’s B, rotational delay is the time it takes the platter to do a full rotation back to the r/w head, seek time is the time it takes to move the r/w head to the correct sector.

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Documentation

the actuator arm moves the R/W head over the platter to a particular track while
the platter spins to position the requested sector under the R/W head.
The time taken by the platter to rotate and position the data under the R/W head is called rotational latency

The seek time (also called access time) describes the time taken to position the R/W heads across the platter with a radial movement (moving along the radius of the platter).
In other words, it is the time taken to position and settle the arm and the head over the correct track.
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TLDR
Key word — Sector & Platter = Rotational delay (Latency)
(NOT TRACK & PLATTER = Seek Time)

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1. Kirill says:

It’s A. 100% – A
Seek time – describes the time taken to position the r\w heads accross the platter with a radial movement.
Rotational delay – time taken by the platter to rotate and position the data under r\w head

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2. Will says: