Correct Answer - Option 2 : 24.58 × 10
6 bytes/s
Concept:
In secondary memory, the magnetic disk is used to store data on the disk surface and the data transfer rate can be calculated at a rotational speed is:
Rd = ST × BS × RS
Where,
Rd = data transfer rate (bits per sec) on track
ST = total number of sectors per track
BS = total data per sector
RS = rotational speed of disk in revolution per sec
Calculation:
Given that:
ST = 400 sectors / track
BS = 512 bytes per sector
RS = 7200 r.p.m
\({R_d} = 7200 \times \frac{1}{{60}}\)
\({R_d} = 120\;r.p.s\)
∴ Rd = ST × BS × RS
= 400 × 512 × 120
= 24.58 × 106 bytes per sec