External USB CD-RW
User’s Guide
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Duplicating a CD
You can choose between two methods if you want to copy a CD.
1. The image copy:
The original CD will be read from the recorder and Nero
will then create and save an image file, with the contents of your CD, to
e.g. your hard disk. In a third step, Nero writes the image file onto a blank
CD-R / CD-RW.
2. The copy on-the-fly:
Nero will read directly from your CD-ROM drive and
write to your recorder, without creating an image file on your hard disk
It's hard to give general advice on when to use ”On The Fly” and when to
use “Image Copy”. The following list can give you some hints:
Choose “Image Copy” if you:
1. Want the best possible reproduction (especially concerning audio tracks)
2. Have enough time for an image copy, which takes somewhat longer than
an “On The Fly” copy.
3. Have enough free space on a hard disk to store the CD image (you will
possibly need several hundred megabytes!).
4. Want to write multiple copies of a CD.
5. Expect read errors on the source CD (for example: scratches and dust on
CD).
6. Want to copy mixed mode (a data track and one or more audio tracks)
CDs. This is because some CD-ROM drives have a unholy tendency to
“hang up” (that means they don’t respond any longer to SCSI/DIE
commands most likely crashing your computer) while reading blocks
between the data and the audio track of a mixed mode CD. If this
happens while an “On The Fly” copy takes place your destination CD will
be crushed by a “Buffer Underrun”.
Choose “On The Fly” copy if you:
1. Don’t have much time.
2. Don’t have enough free space on your hard disk (hint: 1 minute of audio
takes about 10 MB and a CD image file may be several hundred MB
long!).
3. Want to copy a CD-ROM (no audio tracks) and trust the error correction
capabilities of your CD-ROM drive.
4. Want to copy mixed mode (a data track and one or more audio tracks)
CDs and are pretty sure (by experience?) that your CD-ROM drive will
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