Yamaha CD Recordable/Rewritable Drive CRW-F1UX Owner's Manual page 48

Technical Notes
Constant Linear Velocity (CLV)
The disc rotation speed is adjusted to keep the data transfer rate constant while
writing/reading data.
Constant Angular Velocity (CAV)
The data transfer rate is adjusted to keep the disc rotation speed constant while
writing/reading data. The Full CAV method employs CAV all through data writing/
reading.
Partial CAV
The CAV method is employed for inner tracks of a disc and the CLV method for
outer tracks while writing/reading data.
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