Hi,

I recently backed up some media files to a DVDRW before formatting my hard drive. When the backup was complete, I tried playing a few arbitrary songs from the disc to check that everything was ok.

Now when I try to restore them, I get CRC errors for most of the files. However, I can still open them in media player and play them and there are no corruptions. So to me it seems the copy process is just halted because the CRC check failed, but the file is still fine.

What I'm trying to find is a way to force them to copy to my hard drive.

I've tried:

-a couple "file copying" programs hoping that they would ignore errors like that but they didn't work.
-using a different DVD ROM, still same problem.
-booting up with Knoppix, hoping that maybe linux would either copy the files anyway or give me an option to copy anyway, but it didnt.
-making an image of the disc with CloneCD and then using Daemon Tools to read the image, but I get "parameter incorrect" errors after the first 20 or 30 files.

Hopefully someone out there knows a way around this.

Thanks a lot,

Dale

http://www.ross.net/crc/

Thanks for your reply Badboy,

But it seems that site is about the CRC algorithm. It doesn't have any info about bypassing the CRC check on files in Windows.

Unless I missed something...

http://www.softwarepatch.com/software/cd-recovery.html

When Google isn't your best pal

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Did you try:

copy /b
xcopy /c

If at first you don't succeed, you're about average.

M2

Usually the crc errors come from a bad drive or media.

Try to pull the data off the disk on a different computer and see if you still get the crc error.. If no error, your cd/dvd drive is bad. If you get an error on a different computer then you have corrupt media.

Your online computer helpline.
ComputerVitals.com

Hi everyone,

Thanks for your replies.

While trying to find which files were getting CRC errors by trying to copy them to my hard drive just now, I was no longer getting any CRC errors, even on the files I was getting them with before.

I think there's a problem with my DVD burner. First it messed up the DVD during the write so the other DVD ROM drive couldnt read it properly, and then it wouldn't read the disc when the time came to restore the files. Now all of a sudden its reading the disc fine.

I'm going to have to buy a new one.

Thanks again for your responses,

Dale

Just some thoughts...

I just bought some Memorex 16x DVDs and on the top it warns that they may not be compatible with some DVD burners and to check for firmware updates for the 16x burner.

Also, you may want to try slowing down it's burn rate to something slower than you are using now to burn to avoid the CRC errors.

Regards,
Bryan

And don't forget the option of running a drive cleaning disk - it could just be dust on the lens!