Answer:
The average time to access a Sector on the disk is 6.005 ms
Explanation:
Rotational rate = 15000 RPM = (60/15000) = 4 × 10⁻³ s
Rotation time = 1/2 × Rotational rate = 1/2 × 4 × 10⁻³ = 2 × 10⁻³ s
Rotation time = 2 × 10⁻³ × 1000 ms = 2 ms
Transfer time = Rotational rate x (1/Average number of sectors/track)
= 4 × 10⁻³ x 1/800 = 5 × 10⁻⁶
Transfer time = 5 × 10⁻⁶ × 1000 ms = 0.005 ms
Average time to access a Sector on the disk = Average seek time + Rotation time + transfer time
Average time to access a Sector on the disk = 4ms + 2ms + 0.005 ms = 6.005 ms
The average time to access a Sector on the disk is 6.005 ms
