A disk has $20$ recording surface has $12000$ cylinders. There is an average of $600$ sectors

per track. Each sector contains $512$ Bytes of data $[2+2+2]$

a$.$ What is the maximum number of bytes that can be stored?

b$.$ What is the data transfer rate in bytes per second at a rotational speed of

$4800$rpm$?$

c$.$ Using a $30$ bit word $,$ suggest a suitable addressing scheme for the disk,

assuming that there are $512$ bytes $/$ Sector