Question

Estimate the time (in ms) to access a sector on the following disk:

Rotational rate: 5400
Average seek time: 12 ms
Average sectors per track: 485

a) A specific value of time (provide value).

b) The information provided is insufficient to calculate the time.

c) The time is independent of the rotational rate.

d) The time is inversely proportional to the average seek time.

Answer 1

To estimate the time (in ms) to access a sector on the disk, we can use the formula: (1 / (Rotational rate / 60)) + Average seek time.

The time to access a sector can be calculated as the sum of the average seek time and the time it takes for the sector to rotate into position. The time it takes for the sector to rotate into position can be calculated as the time it takes for one complete rotation divided by the number of sectors per track.

Therefore, the time to access a sector in ms can be estimated as:

(1 / (Rotational rate / 60)) + Average seek time