COA - Assignment 2 with Solutions, Study Guides, Projects, Research of Computer Fundamentals

Question - 1

How many 8K x 1 RAM chips are needed to construct a memory capacity of 512K x 16? Draw

and properly label a complete block diagram of the above memory organization.

32x32 x (8Kx1) RAM chips

Question - 2

Consider a single-platter disk with the following parameters: rotation speed: 7200 rpm; number

of tracks on one side of platter: 30,000; number of sectors per track: 600; seek time: one ms for

every hundred tracks traversed. Let the disk receive a request to access a random sector on a

random track and assume the disk head starts at track 0.

299,999 tracks = 1m* 29,999 /100 = 0.299 , average time = 0.299/2 =m 149.99ms

(b)

Rotational speed = 7200 rev per minute = 120 rev per second

Average rotational latency = 1/2r = 4.167ms

(c) Transfer time for a sector:

Transfer time for a complete track = 1/r = 8.33msec

Transfer time for a sector = 8.33m/600 = 13.89usec

(d) total = 154.17msec

Question - 3

Consider a 4-drive, 200GB-per-drive RAID array. What is the available data storage capacity for each of

RAID 6: 400 GB

Question - 4

Divide 189 by 19 in binary twos complement notation, using 10-bit words, using the algorithm

described in section 10.3

Q = 0010 1111 01 , M =00 0001 0011, -M = 11 1110 1101

A Q Count

00 0000 0000 00 1011 1101 10