A checksum or hash is an error-detecting code with the purpose of detecting error which may happened during transmission or storage of data. A checksum is computed from whole blocks of data and results in fixed-length check value which later may be compared to the original data.
There are numerous implementation of checksum algorithm are in data storage and data transport implementation (i.e: Harddisk, Ethernet, Bluetooth). Most of them use cyclic redundancy check (CRC) as its checksum algorithm because of CRC are simple to implement and good at detecting unintentional error made during transmission and storage of data. Hi I have an external My Passport Hard discRecently i have received the following message while i am downloading with u torrent “cyclic redundancy check” I have tried to the check disk solution but apparently didnt work. Is there a solution or i should replace my hard drive asap since i can still see my files.
Checksum hashes and its sensitivity against data input
There are numerous implementation of checksum algorithm are in data storage and data transport implementation (i.e: Harddisk, Ethernet, Bluetooth). Most of them use cyclic redundancy check (CRC) as its checksum algorithm because of CRC are simple to implement and good at detecting unintentional error made during transmission and storage of data.
A specific implementation in the management of data integrity could be observed in the anime-sharing communities, where checksum/hash of CRC32 is embedded in suffix of the filename.
Such example are [Group] Title – Episode [89BD123A].mkv where 89BD123A is a CRC32 hash of said file. While CRC32 hash embedding are made redundant by inherent implementation of hash algorithm of file in BitTorrent networks, the tradition still lives on because of other modes of file transmission which did not have such file hash algorithm feature (i.e: HTTP and IRC networks).
There are few Windows application which could embed or verify the data against CRC32 hash and one of them are RapidCRC.
RapidCRC has simple interface with features that is useful in file verification management. Although RapidCRC is an old application (last update on 2005), it is still reliable for simple file verification. Beside computing for CRC32 hash, RapidCRC could also compute MD5 hash for stronger file verification (note that both CRC32 and MD5 algorithm are NOT suitable for protection against intentional alteration data).
Using RapidCRC is simple because you only need to drag files or folder you want to verify to the main window. After finished computing for CRC32 of said files, RapidCRC will tell you whether CRC32 computed from file data stored against CRC32 hash embedded in the filenames are correct or not. Other action beside file verification includes embedding CRC32 hash to the filename and store CRC32 hashes into a separate (SFV) files for later verification.
RapidCRC can be downloaded in its download page. As of version 0.6.1, RapidCRC is confirmed working in Windows 7.
Besides RapidCRC, there are a simple application (CRC32finder.exe) which could verify file against its CRC32 hash but unfortunately i cannot find download links for said application.
Ever encountered a condition while copying a file to a partition of hard disk, when a dialogue box is popped out like this.
A CRC error is one such error that makes you helpless to transfer or access the data. This error can also occur when a new application file is installed in your hard disk.
“Drive Is Not Accessible: Data Error (Check Redundancy Error)”
An error message is displayed while trying to access an external drive. This may be due to unsuccessful installation of program, a registry corruption or misconfiguration of files.
- To repair and save your data for future use, two easy methods to fix CRC errors are discussed here –
Utilizing In-Built Windows (CHKDSK) Utility
This In-Built utility will help you to repair small corruptions or errors in files, in a way to fix CRC errors if they are small. Follow steps in order to run CHKDSK.Right click on drive to be checked > Click on ‘Properties’ > Select ‘Check’ option from Tools menu. After this, a dialogue box will be appeared, from which you have to select the options and start the scan.
Once the Scan is started, wait for its completion and CRC errors will get fixed in the meantime. But if this is taking too much time and gets jammed, you have to look for some other alternative as errors seem large and unrepairable here. When no CRC errors are found by this check, a dialogue box is again displayed.
This will still give the choice to Scan your drive and check for errors but it would be wiser to go for some other alternative after a Scan.
- Running CHDSK Utility with Command Prompt – You can also run “CHKDSK” utility using Command Prompt when unsuccessful in fixing CRC errors through earlier CHKDSK test.
In order to run CHKDSK commands, user must work as an administrator of the system. Now, use the following instructions:
- Access command prompt by typing ‘cmd’ in the Start Menu.
- Type command “chkdsk /f x:” in command prompt. Letter ‘x’ is a variable and you have to enter your drive name (letter) to be checked in place of x. This command is for basic Scan and helpful in detecting very small errors.
- For advanced Scan, type “chkdsk /r x:” in command prompt where ‘x’ is letter name of the drive. Former is the quick scan method while later will take some time to scan.
- Now wait for the Scan to complete. A report will be generated by CHKDSK and then restart your computer.
Utorrent Data Error Cyclic Redundancy Check
The Windows In-Built tool is often suitable for repairing mildly affected corruptions problems the files. Whereas for fixing severe corruption issues and errors, try using an external (third party) software, preferably with a free Trial Version support for better software understandability, before the purchase.
Utorrent Data Error Cyclic Redundancy Check Fix Repair
Kernel for Windows Data Recovery is an efficient tool to recover lost data and repair corrupted files and errors completely. Any data loss due to virus attack, unexpected shutdown, corruption of hard disk partition, windows file system corruption can be recovered in original form through this tool.