Discussion
The tracks on a disk which can be accessed without repositioning the R/W heads is
Answer: B
Correct answer: Cylinder
A disk pack has one head per surface, all mounted on the same arm. At any position of that arm the heads sit over one track on every surface, and those tracks together form a cylinder - all of it readable without moving the heads again. A surface is one side of one platter, and a cluster is an allocation unit of the file system.
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