Appendix - Yamaha CRW2100SZ - CRW - CD-RW Drive Quick Start Manual

11. APPENDIX

11.1) Writing Modes
11.1.1) Disc-at-Once (DAO)
This mode is used when writing a complete disc in a single pass without pausing. Data
cannot be added later, even if the full capacity of the blank disc has not been used.
Example: General CD-ROM
0
Lead-in
Example: Audio CD
0
Audio Audio
Track 1 Track 2 Track 3
Lead-in
The lead-in and lead-out areas signify the beginning and end points of a
session. They are not part of the data but contain information about the
session itself. Basically, a session consists of a lead-in, data, and a lead-out.
11.1.2) Track-at-Once (TAO)
This mode is used when writing data to a disc one track at a time. More tracks can be
added later if there is enough space left on the disc. This is why Track-at-Once mode is
sometimes referred to as Multisession.
0
Data
Track 1
Session 1
Lead-in Lead-out
/Lead-in
Only the first session of a multisession disc can be played back on a conventional
audio CD player. Single session discs can be played back completely.
Data
Track 1
Session 1
Audio Audio Audio
Track 4 Track 5
Session 1
Data
Track 2 Track 3
Session 2 Session 3
Lead-out
/Lead-in
Lead-out
Audio Audio
Track 6 Track 7
Data
Any remaining space
Lead-out
45
650MB
Any remaining space
cannot be used
Any remaining space
cannot be used
Lead-out
650MB
can be used
650MB