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A bit near the center of a rotating disk travels past a fixed point (such as a
read–write head) slower than a bit on the outside. Therefore, some way must be
found to compensate
for the variation in speed so that the head can read all the bits
at the same rate.This can be done by increasing the spacing between bits of information
recorded in segments of the disk. The information can then be scanned at the
same rate by rotating the disk at a fixed speed, known as the constant angular velocity
(CAV).

 

Please help me understanding the Bold part

asked in CO & Architecture by Veteran (17.6k points)
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