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Asus SCB-2408-D User Manual page 11

Asus scb-2408-d dual interface external slim combo drive user manual 24x/12x/24x cd-rw drive 8x dvd-rom drive
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The diagram below shows the advantage of the FlextraLink ™ recording
technology.
FlextraLink™ Technology Solution
Conventional
Recording
Data
Buffer
Memory
Write Data
Recording with
FlextraLink™
Technology
Partial Constant Angular Velocity (P-CAV) Recording Technology
The Partial Constant Angular Velocity (P-CAV) recording method is a combination of
the Constant Angular Velocity (CAV) and Constant Linear Velocity (CLV) recording
technologies. In CAV recording technology, the drive maintains a consistent rotation
speed which will result in a variable transfer rate, while in CLV recording technology,
the data transfer rate is kept at a fixed level by changing the rotation speed.
P-CAV recording
technology switches from
CAV to CLV once the
maximum transfer rate is
reached. Unlike Zone
Constant Linear Velocity (Z-
CLV) recording, no links are
produced in the P-CAV
recording process, resulting
in a higher average transfer
rate.
The following illustration
shows the Partial Constant
Angular Velocity (P-CAV)
recording technology.
ASUS SCB-2408-D User Manual
Data
Data transfer
slows down
Buffer
Memory
Write Data
Write process
continues
Data
Data transfer
slows down
Buffer
Memory
Write Data
Write process stops;
waits until there is
enough data for writing
Speed
32x
24x
16x
12x
10x
8x
4x
0x
Data
Data transfer slower
than write process
Buffer
Memory
Empty
Bad disc results
Data
Data transfer continues
and fills buffer with
sufficient data for writing
Buffer
Memory
Write Data
Write process continues
until writing is complete
Partial CAV
Time
11

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