User Guide

ASUS CD-R/RW Drive User’s Manual 31
VI. APPENDIX
VI. Appendix
Glossary
Compact Disc Average Transfer Rates
NOTES: 1. The normal CD (at n=1) transfer rate from the disc is 75 blocks per second.
2. The average transfer rates shown are in Bytes Per Second.
Read/Write Audio CD-ROM Mode 1 CD-ROM Mode 2
Speed (2,352 Bytes/Block) (2,048 Bytes/Block) (2,336 Bytes/Block)
1X 176,000 153,600 175,200
2X 352,800 307,200 350,400
4X 705,800 614,400 700,800
8X 1,411,200 1,228,800 1,401,600
24X 4,233,600 3,686,400 4,204,800
32X 5,644,800 4,915,200 5,606,400
What is the Difference Between CD-R “Fixation” And
“Finalization”?
• Fixation is the process of writing the lead-in and lead-out information to
the disc. This process finishes a writing session and creates a table of con-
tents.
• Fixation is required for a CD-ROM or CD-Audio player to play the disc.
Discs which are “fixated for append” can have additional sessions recorded,
with their own session lead-in and lead-out, creating a multisession disc.
• When a disc is “finalized” the absolute lead-in and lead-out for the entire
disc is written, along with information, which tells the reader not to look
for subsequent sessions.
This final table of contents (TOC) conforms to the ISO 9660 file standard.
What is “Disc At Once”?
• Disc at Once is a writing mode that requires data to be written continu-
ously, without any interruptions, until the entire data set is transferred to
the CD-R.
• The lead-in, program and lead-out are written in a single event. All of the
information to be recorded needs to be staged on the computer’s hard disc
prior to recording in the Disc at Once mode.
• This mode is usually preferred for discs that are sent to a CD-ROM repli-
cation facility when CD-R is the source media.