Appendix; Recording Methods - Yamaha CD Recordable/Rewritable Drive CRW-70 Owner's Manual

Appendix

Recording Methods

Disc-at-Once (DAO)
This method is used to write all data onto a disc in one operation. This
method writes multiple pieces of data successively without placing a space
between them, starting with the innermost track of the disc. Once data is
recorded by this method, no data can be added to the same disc even if there
is enough space left on it. This method is very useful for making a backup
copy of an entire CD.
Example: Ordinary CD-ROM
0
Lead-in
Example: Audio CD
0
Audio
data
Track 1 Track 2
Lead-in
Lead-in and lead-out
These refer to signals written on a disc to indicate the start and end points of a
session, respectively.
These signals are not included in the data, but are written in the same session as
session management information. In other words, a session is made up of a lead-in,
data, and a lead-out.
Data
One track
One session
Audio Audio Audio
data data data
Track 3 Track 4
One session
No data can be added even if
there is free space left on the disc.
Lead-out
Audio Audio Audio
data data data
Track 5 Track 6 Track 7
Lead-out
No data can be added even
if there is free space left on
the disc.
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