01_LAYOUT_GB 22-11-2000 09:21 Pagina 28

CDRWAPPENDIXIX

(CONT )

ENGLISH

WHAT IS “DISC AT ONCE”?

•Disc at Once is a writing mode that requires data to be written continuously, without any interruptions, until the entire data set is transferred to the CD-R.

•The lead-in, program and lead-out are written in a single event. All of the information to be recorded needs to be staged on the computer’s hard disc prior to recording in the Disc at Once mode.

•This mode is usually preferred for discs that are sent to a CD-ROM replication facility when CD-R is the source media.

•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 mastering 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.

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