Asus SCB-2408-D user manual Partial Constant Angular Velocity P-CAV Recording Technology

The diagram below shows the advantage of the FlextraLink™ recording technology.

FlextraLink™ Technology Solution

Data Data

Conventional Recording

Data transfer	Data transfer slower
slows down	than write process
Buffer	Buffer
	Memory
Memory
	Empty

Write Data

	Write process	Bad disc results
Data	continues
	Buffer
Write Data	Memory

Data

	Data transfer
	slows down
	Buffer
	Memory
Recording with	Write Data
	Write process stops;
FlextraLink™
	waits until there is
Technology	enough data for writing

Data

Write Data

Data transfer continues and fills buffer with sufficient data for writing

Buffer

Memory

Write process continues until writing is complete

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.

Speed	Partial CAV
32x
24x
16x
12x
10x
8x
4x
0x	Time

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