Yamaha CD Recordable/Rewritable Drive CRW8824E Owner's Manual page 37

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 Track 4 Track 5 Track 6 Track 7
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.
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
Session 1
Data Data
Track 2 Track 3
Session 2 Session 3
Lead-out
/Lead-in
29
Any remaining space
cannot be used
Lead-out
Audio Audio
Any remaining space
cannot be used
Lead-out
Any remaining space
can be used
Lead-out
650MB
650MB
650MB