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ASUS CD-R/RW Drive User’s Manual
VI. APPENDIX
VI.
Appnedix
Glossar
y
Recording in the Disc at Once mode eliminates the linking and run-in and
run-out blocks associated with multisession and packet recording modes,
which often are interpreted as uncorrectable errors during the glass mas-
tering process.
What is “Track At Once”?
Track at Once is a writing mode that allows a session to be written in a
number of discrete write events, called tracks.
The disc may be removed from the writer and read in another writer (given
proper software) before the session is fixated.
The written sessions contain complete “tracks” of information.
What is “Incremental” or “Packet” Writing?
Track at Once writing is a form of incremental write which mandates a
minimum track length of 300 blocks and a maximum of 99 tracks per disc.
A track written “at once” has 150 blocks of overhead for run-in, run-out,
pre-gap and linking. Packet write, on the other hand, is a method whereby
several write events are allowed within a track, thus reducing the over-
head.
These “packets” are bounded by 7 blocks for run-in (4), run-out (2) and link (1).
What is the Difference Between a “Multisession” Disc
and a “Multitrack” Disc?
A “session” is a unity on a CD which is bounded by lead-in and lead-out. A
session contains one or several (up to 99 per disc) tracks.
There are two types of tracks. A Red Book audio track is usually written in
disc at once mode along with several other tracks in one session.
These tracks have index numbers in the subchannel which differentiate
one from the other and which allow selective playback.
The other type of track is the incrementally written type described above.