6
1.2.6) About Partial CAV Writing Method
Writing to a CD-R disc is normally done using CLV (Constant Linear Velocity) method. In this
method, the disc’s rotation speed is adjusted continuously to keep a steady data transfer rate.
The data transfer rate, in the CLV method, is held constant but, because of the smaller size of the
inner circles of the disc versus the large outer circles, the disc speed is adjusted depending upon
which portion of the disc data is being recorded on (i.e. if recording on the inner edge versus the
outer edge, the disc should rotate faster to keep up with the data transfer rate - which is held
steady throughout the writing cycle.)
In contrast, the CAV (Constant Angular Velocity) method keeps the disc’s roatation speed con-
stant while adjusting the data transfer rate depending upon which portion of the disc is being
recorded. In other words, in the CAV writing method, the outer portion of the disc should
receive an increased data transfer rate compared to the inner portion. Applying the CAV
method enables a significant increase in the data transfer rates with a minimum load increase to
the drive’s mechanism.
Yamaha’s new CRW2100 Lightspeed drives use the CAV method in the inner portions of the
disc while using CLV method in the outer portions of the disc in order to enable up to 16x of
writing speed. This is called a Partial CAV method.
2. REGISTRATION
It is very important that you register your new Yamaha CD-RW drive. Registration entitles
you to receive technical support and customer service, as well as valuable information
regarding upgrades and new product introductions from Yamaha. The unique serial number
of your new Yamaha 3-in-1 drive can be found on the unit, as illustrated below.
write serial
number
here
Important Note:
Please write down the serial number of your 3-in-1 CD-RW drive as illustrated in the picture
above. Make sure this serial number is included with your registration information posted on the web or sent
to us by mail. It is also a good idea to write down the serial number of your 3-in-1 CD-RW drive somewhere
else in order to be able to easily refer to it should it become necessary
You can register your Yamaha CD-RW drive by sending in your user Registration Card
(included in the package) by mail or online by visiting
www.yamaha.com
.
Serial number
(3 letters and 7 digits)
Serial No.
