# tut10[1] - COSC 344 Tutorial for Week 10 1. Consider a disk...

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COSC 344 Week 10 Lectures 17, 18 COSC 344 Tutorial for Week 10 1. Consider a disk with the following characteristics: block size B = 512 bytes interblock gap size G = 128 bytes number of blocks per track = 20 number of tracks per surface = 400 A disk pack consists of 15 double-sided disks The disk drive rotates the disk at a speed of 2400 rpm The average seek time is 30 msec a. What is the total capacity of a track, and what is its useful capacity (excluding interblock gaps)? b. How many cylinders are there? c. What are the total capacity and the useful capacity of a cylinder? d. What are the total capacity and the useful capacity of a disk pack? e. What are the transfer rate in bytes/msec and the block transfer time (btt) in msec? f. What is the average rotational delay (rd) in msec? g. What is the bulk transfer rate (time to transfer useful bytes)? h. How much time does it take (on the average) in msec to locate and transfer a single block, given its block address? i.

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## This note was uploaded on 09/07/2011 for the course MIS unknown taught by Professor Unknown during the Fall '09 term at New York Institute of Technology-Westbury.

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tut10[1] - COSC 344 Tutorial for Week 10 1. Consider a disk...

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