Yamaha CRW2200S Packet Writing, Session-at-Once(SAO)

Appendix

Session-at-Once (SAO)

As a writing method that combines the advantages of the above-mentioned “Disc-at- Once” and “Track-at-Once,” you can combine multiple tracks into one session and write them, and then add additional data.

For example, this is the writing method used to create a CD EXTRA format CD. The music tracks will be recorded in the first session, and the data will be recorded in the second session.

Example: CD EXTRA

0

		Audio	Audio	Audio		Data
		Track 1	Track 2	Track 3			Track 4
			Session 1				Session 2
Lead	-in			Lead		-out	Lead	-out
					/Lead-in

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 Direct CD.

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

Packet

Same as writing to floppy or hard disk

Notes on Packet Writing

•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.

•When using packet writing on a CD-RW disc, the actual data capacity is 100MB less than that stated on the cover of the disc. The difference in capacity is dependent on the writing mode.

•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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