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Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Disk requests come to a disk driver for cylinders
in the order 11, 23, 21, 3, 41, x, 25 and 39, at a
time when the disk drive is reading from cylinder
15. The seek time is 4 ms/cylinder. The total
seek time, if the disk arm scheduling algorithms
is first-come-first-served is 560 ms. If the value
of x is greater than 10 then what is the value of
x?
Transcribed Image Text:Disk requests come to a disk driver for cylinders in the order 11, 23, 21, 3, 41, x, 25 and 39, at a time when the disk drive is reading from cylinder 15. The seek time is 4 ms/cylinder. The total seek time, if the disk arm scheduling algorithms is first-come-first-served is 560 ms. If the value of x is greater than 10 then what is the value of x?
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