CD Shredder

From: Pete Turnbull <>
Date: Sat Sep 4 19:50:23 2004

On Sep 4 2004, 15:29, Scarletdown wrote:
> On Saturday 04 September 2004 07:51, Ron Hudson wrote:
> > Too bad AOL doesn't put their stuff on CD-RW (??? CD re-write-able
> > right?)
> >
> > or can a CD-RW be read by a normal CD drive?
> Many CD-R drives can read CD-RW disks, provided you have UDF support.
> For example, on the couple Windows-98 systems I've set up for others,

Almost any CD-ROM or CD-R drive should be able to physically read a
CD-RW, without any special support. Those that can't are mostly old
CD-ROM drives that can't handle the lower levels of light reflected
from a CD-RW.

However, UDF is a type of file system that's used mainly by some DVDs,
video CDs, and some consumer-electronics recorders, and whether that
can be read depends on support in your OS, not the type of drive.
 Unfortunately there are several flavours of UDF, and a lot of
vendor-specific extensions, some of which are used by drag-and-drool
software for Windows. The other problem often seen with CD-RW disks,
even when they have a more ordinary filesystem on them, is that they're
not "fixated" or "closed" -- the last session is left open so it can be
added to. The usual reason is that someone has treated the CD-RW as a
big floppy, rather than a write-once (and perhaps later erase
completely) medium. Lots of software (and CD players) can't handle
unfixated disks.

Pete						Peter Turnbull
						Network Manager
						University of York
Received on Sat Sep 04 2004 - 19:50:23 BST

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