Session-at-Once (SAO)
This mode is used when writing each session in a single pass without pausing.
More sessions can be added later if there is enough space left on the disc.
n
With CD-Extra, the audio is written in the first session and the data is written in the second.
A maximum of 99 tracks can be written.
Packet Writing
This mode is used when writing to a track of a disc using small blocks of data
called “packets,” in a manner similar to a floppy disk. This mode is useful when
making small incremental backups of data. You will need to use software which
specifically supports packet writing, such as Adaptec’s DirectCD.
n
Discs must be formatted before they can be used for packet writing. With CD-RW, erased data
can be overwritten until the disc is completely full.
With CD-R, the space used by the erased data cannot be reused and is “masked” so that it is
no longer visible. This can be done up to 100 times.
1
2
3
4
5
6
7
8
.
.
.
.
.
.
.
.
.
.
.
.
Packet
Same as writing to floppy or hard disk
Audio
Audio
Audio
Data
Track 1
Track 2
Session 1
Track 3
Track 4
Session 2
Example: CD-Extra
36
Appendix
8424S_e.qx 10/25/99 1:18 PM Page 43
