If you have more than one CD drive you can sometimes write directly from the
regular CD to the CDR (writer), though that depends on a bunch of variables like
the drive speeds, ATAPI or SCSI, etc. Generally, you would have the data on
your hard drive that you wished to store on the CDR. You can make an 'image' of
a CD from which you can make multiple copies, but that, of course, requires that
you have the image stored on your hard drive.
Re-writing may be being misunderstood here. A CD-RW is a CDR which can deal
with CD blanks that can be erased and written on again. Regular CD blanks
cannot do this; write them once and you are stuck with the results. That used
to be a real big deal when the blanks were 15-20$ each, but now you can get them
for about 1-2$ each so it doesn't matter if***one up, you just toss it (and
get an extra jewel case out of the deal). The re-writable blanks are more like
15-20$ these days and tout the ability to be erased and written to again 1000 or
more times. Not every CDR handles re-writing, you will see both CD-R drives and
CD-RW drives, the CD-Rs being generally cheaper.
I have a CD-RW in addition to my regular CD-ROM. I have used it to back up CDs
of my 2 year old daughters' games because she likes to push the button on the CD
drive and take the CD out (shiny, y'know) and tote it off somewhere in the
house, being none too gentle or careful in the process. Whenever I get her a
CD, I always copy it before I ever even put it in her computer. CD-writers are
also very useful for getting accumulated pictures, videos and other
space-devouring ***off your hard drives. 1$ for 650 meg of storage space is a
better deal than any Zip drive-like solution I can think of.
~daxe
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