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does CRC(Cyclic Redundancy Check “error”) mean? There are
plenty of technical resources on the Web that discuss cyclic redundancy checks
(CRCs). Most times you won't need to worry about this technobabble. That is,
until one it day it suddenly appears and you think - what the hell does that
mean? In simple terms, a CRC is bit of mathematics used to ensure that your
data is OK when being transfered. It's a checking procedure that quickly
identifies when data has been damaged. If you get this message, it means that
the file being read by your PC or software is corrupted. However, it does not
mean all the data is lost forever. When data is transfered, it is usually in
small blocks and each block is given a CRC value. If something goes wrong with
the data between the time it leaves the source and arrives at its destination,
the CRC sent at the source will no longer match the one that is calculated when
the data arrives - this is when the cyclic redundancy check error will appear. The most
common time you will see the cyclic redundancy check error message is when
trying to read data from a damaged CD or DVD. Just before it appears, your
CD/DVD drive will probably grind and whirl away - your PC may also become a
Less frequent causes are the
result of system crashes, and buggy software (hello Microsoft), incomplete
downloads (often identified by the misleading message 'This is not a valid
Windows file', 'This is not a valid win32 application' or 'Corrupt Zip file').
If this problem happens frequently with downloads, try using a download
For CDs and DVDs, the problem is
a little different. Normally, when CD/DVD drives get a CRC message from a disc,
they try to read the disc again - hence the grinding sound. After several
failed attempts, they give up and display the redundancy check error. The
problem can be hardware (loose cables, failing drive), software or damaged
media. In most cases checking and cleaning the disc is the easiest way to
overcome the problem. If different clean discs produce the same error, it is
likely to be a hardware issue (check the discs in another drive). Another
common cause of these errors is poorly burnt CDs and DVDs - especially those
that had numerous or severe buffer underuns. USB burners suffer from this problem
when the burn speed is too high (generally above 4X-8X)
If the discs are damaged, you'll
probably need a recovery tool to get back your data. CDCheck 3
will work for CDs and DVDs. First it will check the media, and then you have
the option to recover the files. It's free for personal use and has saved many
people heartache when it comes to recovering lost digital images and videos
from damaged CDs.
If you have access to the lens clean with a tissue or micro fibre cloth In circular motions gentle 10-12 swirls and then try the drive if problem persists then your drive lens have got weak need to replace drive. You have to remove the top cover of drive with 6-8 small screws. It first stops cd reading and writing or just take a specific brand of DVDs or CDs and then It fails over time, it's normal failure behaviour. Pls rate my solution if I helped.
The Cd you are trying to copy may be damaged, take it out clean it and try again, if that doesn't work check that the media you are trying to copy is compatible with the source discs, wouldn't be the first person to try copying a CD onto DVDs or vice versa, an easy mistake i've done this myself
If it is a cd-rw, as you've indicated above, it will not burn DVD's. The front of the burner will list what it can burn. For instance, my machine says DVD-+RW, which means that it can burn to both + and - DVD's, but it cannot do Dual-Layer (DL) DVD.
This problem is normal and exists with many CD/DVD drives. On some of the drives, if you put in blank discs and try to open the disc in My Computer or Windows Explorer, Windows displays no contents or a blank disc. Whereas on other drives, you get the error message that you mentioned about incorrect function.
What software are you using to burn CDs or DVDs? Are you able to burn CDs but not DVDs or you can't burn both the discs? Did you try a CDs with a different make/manufacturer? Some drives refuse on some disc makes. Try another disc and another writing speed, or try the lowest writing speed available with your software.
of course theres a problem but what are you doing with the thing? are you formaating the disk first to render the dvds in the target drives? are you using the right DVD like DVD+ DVD+- or Blueray? need more information to help you. and it the DVD you are copying has been redered on another machine it won't copy it anyway. You have to use the same machine to copy it as thats how they protect copy rights now days.