Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 27 (Page No. 431)

Question

If a disk has double interleaving, does it also need cylinder skew in order to avoid missing data when making a track-to-track seek? Discuss your answer.

Answer 1

The answer to this depends and can be both yes or no. Doing double interleaving is nothing but just a cylinder skew of two sectors. No cylinder skew would be needed if the head can do a track-to-track seek in less than two sector times.

On the other hand, if it is not able to do then, extra cylinder skew time would be needed in order to avoid the missing sector after one seeks.