Whats the difference between “single-session” and “multisession”?
A single session CD has been written to only once. A multisession CD contains data which is added incrementally in more than one recording session. If data is linked between session, all data on a multisession disc, when read on a multisession CD-ROM drive, may be seen as part of a single logical structure. Closing a session takes some extra space on the disc for the session lead-out, about thirteen megabytes. Uses for multisession include periodically backing up quantities of data less than the full capacity of a disc, or distributing data which is periodically updated. Because only multisession CD-ROM drives can access all the data on a multisession disc, it’s best to consider such discs for use only where you have some certainty or control over what system will be used to read them. If you have a strong need to distribute data on multisession discs — you send discs out to clients or colleagues, they send them back to be updated, and then you send them out again — you should ensure
