Estimate elevator algorithm-closest cylinder next, Mechanical Engineering

Disk requests come in to the disk driver for cylinders 10, 22, 20, 2, 40, 6, and 38, in that order. A seek takes 6 mes per cylinder moved. How much seek time is needed for

(a) First-come, first served.

(b) Closest cylinder next.

(c) Elevator algorithm (initially moving upward).

In all cases, the arm is initially at cylinder 20.

 

 

Posted Date: 4/1/2013 6:36:46 AM | Location : United States







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