CDR100/102 conforms to the three recording modes outlined in the Orange Book Part 2: Track At Once, Multisession and Disc At Once.
In this mode, data can be recorded to disc a track at a time. However, the disc cannot be played until the ﬁnal recording is made.
In this mode, data can be recorded to disc one track at a time, and the disc can be played
In this mode, data can be recorded to an entire disc in one go. To use this mode, your software must support Disc At Once recording.