How many characters can be stored on the disk what are the, Computer Engineering

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How many characters can be stored on the disk what are the

Problem

A memory has 8 megabytes of cells

(a) What is the size of its MAR?

(b) If 2-dimensional addressing is used, what is the size of each of the horizontal and vertical decoders?

Assume that a hard disk has the following characteristics: Rotation speed = 7,200 rev/min Arm movement time = 0.5msec fixed start-up time + 0.05 msec for each track crossed Number of surfaces = 2 (double-sided disk) Number of tracks per surface = 500 Number of sectors per track = 20 Number of characters per sector = 1,024

(a) How many characters can be stored on the disk?

(b) What are the best case and worst case access time for the data (in a sector)?

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