disc-at-once

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disc-at-once

To record all the data on a CD-R disc at one time. The lead-in (table of contents), all the tracks and lead-out are written, the session is finalized, and the disc is closed. The laser is kept on for the entire session, and the two-second gaps between tracks are eliminated. At one time, CD manufacturers asked for disc-at-once CD-R masters to ensure a proper reproduction, but this requirement has been mostly relaxed. See track-at-once.

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Incremental writing allows a user to add files directly to a DVD-R disc one recording at a time instead of requiring that all files be accumulated on a hard disk prior to writing as with the disc-at-once method.

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These software packages wrote to discs in one long, continuous session (Single session, or disc-at-once).

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The drive supports a wide variety of CD writing modes, including Track-at-Once, Disc-at-Once, Session-at-Once, Multisession, and variable/fixed packet writing.