Question

Difference between constant angular velocity and constant linear velocity

Answer 1

In optical storage, constant linear velocity (CLV) is a qualifier for the rated speed of an optical disc drive, and may also be applied to the writing speed of recordable discs. CLV implies that the angular velocity (i.e. rpm) varies during an operation, as contrasted with CAV modes.

Answer 2

Difference between constant angular velocity (CAV) and constant linear velocity (CLV) are given below.

(CAV):

1.    Here, the disk rotation is kept constant.

2.    But the density of bits/track is not uniform.

3.    To keep data constant, this method decreases the density of bits to outer track from the inner track.

4.    So outer tracks hold same quantity of data as inner tracks. This method is called as angular velocity (CAV).it is used in the hard disc.

5.    Lower noise level than CLV.

(CLV):

1.    Higher noise level than CAV.

2.    The speed of disk rotation is constant.

3.    Random access data is difficult and slow.

4.    Performance issue with CD-ROM.