Asus Network Device CRW-3212A User Manual page 5

Zone CLV Recording Technology
The Zone Constant Linear Velocity (CLV) recording method allows you to
achieve a higher recording speed by using a different speed for each of
the four zones partitioned from the inner to the outer area in a disc.
When using the Zone CLV, the recording in Zone 1 is 16X speed, then
increases to 20X speed in Zone 2, after t1 time. In Zone 3, the recording
reaches 24X speed, after t2 time. The recording speed reaches the
maximum 32X in Zone 4, after t3.
Zone CLV Recording Method
Speed
32x
24x
20x
Zone2
16x
Zone1
t1
ASUS CRW-3212A User's Manual
Zone4
Zone3
t2 t3
Time
13