Classical

Operating System - I/o System

11:  

A certain moving arm disk storage with one head has following specifications : Number of tracks I recording surface 100 Disk rotation speed 2400 rpm Track storage capacity= 62500 bits

The transfer rate will be

A.

2.5 Mbits/s

B.

4.25 Mbits/s

C.

1.5Mbits/s

D.

3.75Mbits/s

 
 

Option: A

Explanation :

 In 25 ms, one rotation is completed and all the 62500 bits are transferred. So in 1ms, 2500 bits are transferred. Accordingly, in 1s, 2.5Mb are transferred. Thats why the speed is 2.5Mb/s

MB - Mega Bytes,

Mb-Mega bits.

 




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