| slovo | definícia |
constant linear velocity
(foldoc) | constant linear velocity
(CLV) A way of controlling the rotation of the disks
in a disk drive in which the linear velocity of the disk
surface relative to the read/write heads is kept constant.
In order to achieve constant linear velocity, the disk must rotate
faster (at a higher angular velocity) when reading or writing
tracks closer to the centre.
Having a constant linear read/write speed along the track means
that the electrical signal to and from the heads has a constant
data rate (bits per second), thus simplifying the timing of the
drive electronics somewhat. However, rotating at less than the
maximum possible rate sacrifices some potential performance
compared to the alternative, constant angular velocity. Also,
varying the rate causes more vibration and consumes more energy.
(2014-07-27)
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