Re: CDR quality / reliability problems

On Mon, 03 Apr 2006 09:25:32 +0200, Chel van Gennip
<chel@xxxxxxxxxxxx> wrote:

On Mon, 03 Apr 2006 04:21:47 +0200, Julian wrote:

But if you get a positive verification in Nero there is no reason to
suspect unrecoverable errors.

If you get a positive verification you know your disk is readable in the
same drive you wrote it at that moment. You don't know how much the error
correction mechanism added to that success. A single bit lost later, by
degradation, scratches, or drive differences, may be too much. So if audio
disks give problems above 24x, better not expect your data disks to be top
quality at 48x.

After a year at this new setup without a single data verification
error I'm not too worried about burning data discs at 48X.

I mis-stated my self. I didn't have lots of problems above 24X with
audio. I didn't extensively test burning audio above 24X. On
previous burners I noticed problems when burning audio at max speed
and as policy went to never burning higher than 1/2 max routinely. I
may have noticed a problem when burning one audio CD at 48X once with
this new rig when I first got it or maybe not. I can't remember for
sure. I've had it over a year. Mostly I never burn audio CD's at top
speed because there is no easy way to verify and I have had problems
burning audio at max speed on other drives. I still think that is a
safe policy since it is hard to verify audio discs.

I just did an experiment and ripped a track on my CDRW drive using the
CD DAE program mentioned in an above reply which returned 0 errors in
the ripping process and then burned that same track at 48X and then
re-ripped it a second time and 0 errors again. Re-ripped the second
burn in my DVDRW drive and 0 errors also. In this one case with that
one track there seem to be no problems detectible even at top burning
speed using either of the 2 drives I have available to verify the
disc.

Just for comparison I put in a disc a non-professional friend sent me
and I got errors on all his tracks, up to 11,000 errors (.10%) on a
track a similar length to the one I ripped burned and re-ripped on my
own rig at 48X.

Since I've shown 100% error free performance in this one case burning
audio at 48X, I think if I burn at 24X routinely I can depend that my
audio discs will be as reliable as possible.

Julian



.

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