- With Constant Angular Velocity, CAV, the disk rotates at a constant angular speed, with the bit density decreasing on outer cylinders. ( These disks would have a constant number of sectors per track on all cylinders. )
But as per the below document :
Constant angular velocity (CAV). The rotational speed of the disk is constant. To use the platter in an efficient way, the outer tracks have more sectors than the inner tracks. Used in hard disks.
In that case, don't you think that the answer should change?
Also, since the diameter of outer tracks is more than that of inner tracks, outer tracks can be made to hold more data as compared to inner tracks.
So, to efficiently use the space, most hard disks divide the tracks into zones with 0th zone is starts from the outer edge of the platter and the last zone is the innermost tracks of the platter.
So, the data rate changes as the read write head changes moves from outer edge to inner edge.
More Reading on this : http://www.pcguide.com/ref/hdd/geom/tracksZBR-c.html
But disk with constant linear velocity, density of bits per track is constant and to get higher data rate the speed of the disk is increased.
So, in case of Constant Linear Velocity, I think all 8 equidistant tracks, all can store only 10MB of data.
So, in case of CLV data that can be stored should be 80MB.
And in case of CAV, it should be 360MB.
Please let me know if anyone agrees on this