Question

Using the SCAN disk scheduling algorithm, the disk head starts at cylinder 65 and is initially moving toward higher cylinder numbers, with valid cylinders ranging from 0 to 199. Pending requests are for cylinders 10, 70, 85, 20, 150, and 40. What is the total head movement, in number of cylinders?

A 313
B 333
C 303
D 343
E 323
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