User manual SONY PCK-LM14 DATASHEET

[. . . ] The first session being written to the CD-R/CD-RW needs about 9MB of Lead-in space. It will also need about 13MB of Lead-out space. This amounts to around 22MB of wasted space, which is not usable for the storage of any useful data. [. . . ] For each additions session after the first will require around 9MB of Lead-in, but the Lead-out drops to around 4. 5MB, resulting in about 13. 5MB of wasted space. Note that all Lead-in/Lead-out space is not usable by the system for storage of useful information, but is needed to differentiate between the different sessions being written. The overhead will affect the total number of jobs that can be written to a CD. The First job written to the CD-R/CD-RW will use about 22MB of extra space for Lead-in/Lead-out. The second through N jobs will use about 13. 5MB of extra space for each of those sessions for there associated Lead-in/Lead-out. For Example: If we take a 39 Job scenario. Those 39 jobs are Simplex Letter Sized Media comprised of plain text. Lets assume when using the Save as PDF format, it results in a PDF of 4MB in size. So, this scenario those 39 jobs of 4MB, would be a total of 156MB of data. Lead-out The lead-out indicates the physical end of a session, but contains no actual data. It is always written together with the lead-in at the end of a session. The first lead-out written to a disc takes up 6750 sectors about 13 Mbytes) on the CD, while subsequent lead-outs take up 2250 sectors (about 4. 5 Mbytes). Multisession A multisession CD-R/CD-RW is a CD Media with more than one session on it. Session CDs are divided into tracks and sessions. A CD can hold several sessions with each session holding one data track containing one or more files. If you want to write a data CD in several steps, you have to write a dedicated session each time. This is what is called a multisession CD consisting of a Lead-in area, a data track, and a Lead-out area, repeated any number of times. You will need 22MB of CD space for the First Session Lead-in and Lead-out overhead and 13MB of CD space for each Lead-in and Lead-out overhead for each additional session. [. . . ] This is what is called a multisession CD consisting of a Lead-in area, a data track, and a Lead-out area, repeated any number of times. You will need 22MB of CD space for the First Session Lead-in and Lead-out overhead and 13MB of CD space for each Lead-in and Lead-out overhead for each additional session. Not that this space does not contain any useful data. [. . . ]