Computers and Technology, 06.12.2019 06:31 iamasia06

P1. consider the following specifications for two hard disk drives:

drive a:

drive diameter: 3.5"
platters: 2
rpm: 7,500
exterior color: silver
average time needed to move the read heads to a specific track (seek time): 7ms
rate at which data passes under the read heads: 40 mb/s
rate at which the hard drive communicates with the computer: 100 mb/s
drive b:

drive diameter: 2.5"
platters: 4
rpm: 10,000
exterior color: blue
average time needed to move the read heads to a specific track (seek time): 4ms
rate at which data passes under the read heads: 90 mb/s
rate at which the hard drive communicates with the computer: 200 mb/s
assume that the os requests a read of some block of data from one track on a drive. assume the drive controller will read the entire block of data from the disk, then begin transmitting the data back to the os. answer the following questions twice, once for drive a and once for drive b.

(a) what is the average latency for reading a 1024 byte block of data?

(b) what is the minimum latency for reading a 2048 byte block of data?

(c) for each drive, determine the dominant factor that affects latency. specifically, if you could make an improvement to any one aspect of that drive, what would you improve and why? if there is no dominant factor, explain why.

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P1. consider the following specifications for two hard disk drives:

drive a:

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