Yamaha CRW8424E Packet Writing, Session-at-Once(SAO)

Appendix

Session-at-Once (SAO)

This mode is used when writing each session in a single pass without pausing. More sessions can be added later if there is enough space left on the disc.

Example: CD-Extra

0										650MB
			Audio	Audio	Audio			Data
		Track 1		Track 2	Track 3			Track 4
									Any remaining space
				(Session 1)				(Session 2)	can be used
Lead	-in				Lead		-out	Lead	-out
						/Lead-in

With CD-Extra, the audio is written in the first session and the data is written in the second.

A maximum of 99 tracks can be written.

Packet Writing

This mode is used when writing to a track of a disc using small blocks of data called “packets,” in a manner similar to a floppy disk. This mode is useful when making small incremental backups of data. You will need to use software that specifically supports packet writing, such as Adaptec’s DirectCD.

1 2 3 4 5 6 7 8 . . . . . . . . . . . .

Packet

Same as writing to floppy or hard disk

Discs must be formatted before they can be used for packet writing. With CD-RW, erased data can be overwritten until the disc is completely full.

With CD-R, the space used by the erased data cannot be reused and is “masked” so that it is no longer visible. This can be done up to 100 times.

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