re: CRC Failures & Random Errors
Thursday, February 5, 2004 at 10:18 pm
Windows 2000 Annoyances Discussion Forum
Posted by Billy
(3 messages posted)
thanks for your input :D
But it's beyond what extraction program im using. (winrar :)). CRC errors upon extraction
is one symptom. All the blue screens, and random shutdowns of background programs,
the most annoying is the CRC errors.
I've used 3 different OS's with clean installs. Win ACE winzip win rar, none work.
Files i downloaded were update patches from fileplanet.com, Nero Burning ROM demo,
and many others. No files can be extracted propely.
It has to be a hardware issue.
On Thursday, February 5, 2004 at 9:51 pm, DEX wrote:
>Billy
>Long shot what ver of Winzip are running ?
>
>You can try a newer ver to see if that helps....
>Most files you download are zipped up but not all but if you have install Winzip
>on your machine it will take control of many files that you download..
>
>see note about CRC errors below..
>
>WZ91 - CRC Error
>
>About CRC Errors
>A CRC error indicates that some data in your Zip file is damaged. CRC stands for
>“cyclic redundancy check”. It is a calculation made from all the data
>in a file to insure accuracy in transmission. When you add a file to a Zip file,
>WinZip calculates a CRC value for the file and saves the value in the Zip file.
>When you later extract the file from the Zip file, WinZip® calculates the CRC of
>the extracted file and compares it to the value stored when the file was zipped.
> If these two CRC values do not match, the file that was extracted does not match
>the original file, and WinZip will display a “CRC Error” message.
>
>When the data in a Zip file is damaged, it may not be possible to extract all of
>the files from the Zip file correctly. Damaged data can affect the entire Zip file,
>multiple files, or just one file.
>Why CRC Errors Occur
>There are many possible causes for data damage. Among the most common is telephone
>line noise or some other transfer error when downloading a Zip file from an online
>source such as the Internet, AOL, or CompuServe. Such an error can introduce invalid
>data into a Zip file. Some other possible causes include exposure of disks to excessive
>temperatures or magnetic fields, cross-linked disk sectors, and mechanical problems
>with disk drives.
>
>What to do if a CRC Error Occurs
>The best solution to the problem of a damaged Zip file is to try to obtain another
>copy of the file. For example, use your backup copy of the file or get a new copy
>from the original source. If you obtained the Zip file by downloading it, then downloading
>it again will almost always solve the problem.
>CRC Errors on Removable disks
>If the damaged Zip file is on a removable disk, the removable disk may be physically
>damaged, or the data on it may have been corrupted. In these cases, the only completely
>reliable solution is to use another copy of the disk or Zip file that is undamaged.
> There are, however, two other situations in which it may be possible to recover
>some files from a removable disk.
>
>· The removable disk drive that you are using to unzip the Zip file may be malfunctioning.
> Try using a different disk drive, if possible.
>· If the removable disk drive you are using to unzip the Zip file is not the same
>drive that was used to store the Zip file on the removable disk, and you have access
>to the original drive, try using this drive to unzip. It is possible that the original
>drive may be able to read the disk; if so, you can extract your files using this
>disk drive (and have your removable disk drives checked out--at least one of them
>may be out of alignment). Otherwise, the removable disk itself or the data on it
>is probably damaged
>
>Copyright © 1991-2000 by WinZip Computing, Inc. All rights reserved.
>See the help in Winzip for more info on CRC errors
>DEX
>Hope this helps
>
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