Cyclic Redundancy Check: what is it, and how do I get rid of it on my newly burnt CDs and DVDs?

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Hi Leo...

Nice site... and let me put this to you to continue this thread about CRC:

I've just got a new laptop from Dell... it has XP Prof SP2, up to now I've been using XP Home SP1 (deliberately did not "up"grade to SP2).
Many files which are on DVD which I need to copy over are being rejected by the new machine's drive... back at the old machine they are accepted fine... but when I run CDcheck on the old machine errors are indeed flagged. Is there sthg about XP Prof (SP2) which would account for this... and more importantly, is there not some way of tweaking XP Prof SP2 so that it is less puritanical?

Otherwise presumably I'll have to reformat, install XP Home SP1 on the new machine and struggle to stop Micro$oft inflicting its hateful "up"grades on me and causing me even more Micro$oft-related stre$$... than normal?

Thanks
Mike

You might mention that you can also get a CRC error on SD cards... and various other media.... not only CDs/DVDs.

http://filerecovery.hostyourself.net/
If you suspect the CRC is because your cd is scratched use JFileRecovery to copy. NOT FOR EXEs but if its music or video you're trying to recover (assuming the cd is not broken in 8 places) its a miracle worker.

The only answer I know of for the CRC error, is to download and use CDCheck on the CD or DVD. It reads and re-writes the whole CD/DVD, to a new folder, until it gets to the problem area. Then, it reads it, sector by sector, and stamps a "0" in an unreadable sector, until it finishes reading the "BAD" part of the CD/DVD and repairing it that way. This works for scratches and other errors on the CD/DVD that causes a CRC. (I think it works for computer files, etc. but I've never needed to try this.) Another trick is to copy all the files with Windows Explorer/My Computer, and only run CDCheck on the file(s) that produces the CRC. Then, from the folder that the repaired and copied files are in...burn that like it was a CD/DVD...this is just faster, CDCheck will do it all for you, it just takes a little longer on files that don't need repairing. Using AnyDVD, in the background, allows one to do this to any copy protected CD/DVD, as well. It works GREAT!!! Good luck and enjoy repairing your messed up CD/DVDs. :-)

i have just finished backing up over 200gb of my files onto dvds only to find that i have been burning CRC errors into many of the discs, is there any QUICK way to test files readability so i can create a list of whats bad and whats not then get the bad files reburnt now the problem is fixed. ive tried CDCheck & IsoBuster they take forever to read the bad files. i need something that can just knock up a disc review quickly is there such a thing?? or maybe a way of reducing the amount of time windows spends tring to reread the bad info? so i can test the discs myself or am i better off starting from scratch?

Dear Leo,
I have tried everything recomended on this site about CRC. But nothing works. My friend said that he would let me borrow a DVD for a week with some files and pictures of his trip to places around the world, and I was so excited because he gave me permission the make a copy so I can keep a copy. But when I tried to copy it, "Error, Cyclic Redundancy Check" pops up everytime. There isn't an scratches on the disk, nothing's wrong with my computer DVD drive reader. I even tried to copy the file on my other desktop and my second laptop, but nothing. Please help:(

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Hash: SHA1

Some combination of the problems listed in the article may simply make it
impossible for you to read that DVD. Have your friend make sure he can still
read it, and if possible, burn you another copy.

Leo

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CRC errors can also be caused by IDE cables being too close to each other, or too long.

Hi all,

SOLUTION: I also had problems with the CRC error when burning games. My try has been with two .rar games. What I did what was just to descompress the total file.rar into my PC and to install the games directly from the given data,through the setup.exe , without burning the game.
When I was installing the game from the DVD I was getting the error but the same file descompress and installed without burning had succesful results. I hope it can help, though I know my comment is not very professional

Leo, I need your help. I had copied some video files that I had purchased off a website and burned them to a c.d. Now, the c.d. worked fine but about a year later, I'm getting the cyclic redundancy message. I think my first mistake was using memorex c.d.s as I've used the Sony brand and they haven't been giving me any trouble so far.

I've tried everything: copying files to my desktop, to a folder, burning to DVD (I've lost three so far because of the error message) and I've even tried windows media maker on my desktop and laptop to try and save the video files. This isn't the first time this has happened to me and I'm trying to avoid erasing the disc altogether as I spent a lot of money obtaining these video files. Is there any way to save what I have without erasing everything?

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