Asus DRW-0804P-D User Manual page 13

Constant Angular Velocity (CAV) recording
The drive employs the Constant Angular Velocity (CAV) recording method.
With CAV recording, the drive spindle motor rotates the disc at the same
speed regardless of the radial position of the pickup head. This means that
there is a higher transfer rate when writing data to the outer tracks of the
disc than to the inner tracks, as the head traverses a longer linear path on
the outer than the inner part of the disc.
Although the transfer rates vary, and may not be at maximum, depending
on the part of the disc being written to, the CAV method allows faster
recording speed because the rotation speed does not have to change
when the head writes data to different areas of the disc.
Speed
52x
48x
40x
32x
24x
16x
8x
0x
ASUS DRW-0804P-D external DVD R/RW drive
CAV Recording Method
Time
13