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My recorded CDR disc suddenly becomes unreadable!!!

M

MAMAFUFU

Senior member
A few days ago, I wrote some data to a CD-R disc, about 250MB on an Acer 6x2x2x CDRW, using NeroBurning Rom v5009. I choose "start multi session ....." in Nero.

I have been able to read the data in this disc in at least 4 different machines.

However, yesterday all my machines can't read the disc anymore. Whenever I try to access the disc, it says "disc not found" . When I view the disc info in Nero, it says the disc is BLANK with 650MB capacity! The disc was clearly labelled and I can see the written grooves/surface on the disc, so I'm 101% sure this is the CDR disc that has been writen 250MB on it, and it's surface is 100% clean and smooth, absolutely no scratch or damage.

What happens to my disc?

 
What brand of media? Could be that you picked a bad apple, but think of it this way: You just found yourself a new coaster. Seriously, some CD-R media is not all that great, in terms of reliability. Sometimes its worth it to buy the more expensive alternatives.
 
The media is Raycom, 3X more expensive than the cheapest one, but at 1/2 the price of Kodak.

The disc was only recorded once.
 
I have one that does the same thing--depends on the alignment of the sun if it'll read. Be sure both sides are clean, as the laser has to shine through, or so I've been told (Spinal Tap rules!!! Must...control...anticipation of upcoming DVD... 🙂).
 
It could be an O.S. error like in Win98 . I had many discs unreadable till I rebooted. Or until I messed around with the other CD-DVD Drives in my system...Just a guess
 
1. The disc is 100% clean and scratched.
2. It is unreadable from any machines.(I have try 4 different CD-ROM drives)
 
It may be a problem with the index. Try different software to import the session and you may be prompted to close it.
 
In Easy CD Creator you just use CD -> Import Session or something. I'm assuming you tried Nero's equivalent already (?) -whatever the process is to add another session thingy.
 
Well, since it's "perfect", as you state, there should be no problems..... but there is. and hopefully one of those 4 computers can read the same disk twice, I would guess there is something wrong, not with the 4 comps, but with the CD itself, try cleaning it. BTW, if you cant see a scratch, doesnt mean no scratch is present, just none visible to the naked eye. As I said, clean it, try another program as aothers say.... try your friends, and if it doesnt work then, cry a little and fry it.
 
nEoTeChMaN

Are you sirius? - I have a similer problem - is it OK to do that to a CD-R media? - can it help? - the media is expendioble. so i can test...

Thenks 🙂
 
Of course, anything to clean or clear the line fo sight for the laser will help in reading, once a disk cannot be read, you may as well try any number of extreme measures to fix it if it's that important... especially since cds are so cheap, if you mess it up more... oh well (unless you had deleted the important info) burn again, and since it's already unreadable, it really wont change much if you screw it up, but if you save it.... w00t!!
 
TechMaster--Yeah, it is fine. I've had to wash many library cd's. Usually, I just use water, but if necessary add some Joy liquid or something. Just wipe from the center out, because of the way data is written. DON'T wipe in a circular motion like you would "Diskwasher" a vinyl LP.

For scratches I've been told you can polish them out with a light car polish (less abrasive than wax, I believe) or toothpaste, rather than buying the stuff that is specific to fix scratches.

For scratches, it really depends if they are perpendicular to the center hole, or partially circular. Because of the error correction, bad perpendicular is better than not so bad circular.
--Randy
 
Theres this thing you can get at most local CD (Audio CD) stores.
Its called a Roto-something.. You put a cd in it, and spin the handle and it'll polish out scratches on CDs. It looks like a whack radial saw.. the one I saw was green.
 
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