The cyclic redundancy check, or CRC, is an error-detecting technology commonly used in digital networks and storage devices to detect accidental changes to raw data. It serves as a data verification method to check the accuracy of data on hard disk drives, CDs, DVDs, etc. How to Repair RAR File CRC Error? RAR stands for Roshal Archive but is commonly called as RAR by most of the users. It is a compression technique used to compress one or more files on systems hard drive to save some memory space.
An event based timeline to correct Data error Cyclic redundancy check
Cyclic Redundancy check well known as CRC is an error detection code that gives data error cyclic redundancy check if it identifies any changes to the data that is being stored, accessed or transferred onto a storage device like CD/DVD, SD card or a hard drive.
In further detail when CRC is set up on a device it forms a codeword for data that is to be stored or sent to another storage media. The code word consists of check values that are calculated block wise before storage of data.
While the data is being accessed by computer, the codeword or the check values are compared with current values of accessed data and any mismatch in the values result in data errors. This would mean inaccessible data due to hard drive or SD card corruption.
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To perfectly understand how to fix data error cyclic redundancy check on various storage devices, beginning with understanding error, solutions are discussed in the form of an event based timeline that concludes with a method that involves least risk of data loss while solving the CRC error.
Event 1: Encountering CRC data error
As shown in the image above an error message shows up when you try to open a file or folder in a SD card, hard drive. Usually the data becomes inaccessible due to logical data error (corruption) or physical damage.
In the following sections we will broadly discuss about the below errors and solutions to solve data error CRC:
CRC error on internal and external hard drives
Data error (cyclic redundancy check) on SSD
Cyclic redundancy check data error on SD cards
Cannot initialize disk: Cyclic Redundancy Check
While it’s common for the CRC error to occur on external hard drives and portable media like SD cards or flash drives, it can also happen to internal drives and its partitions; in cases like these you will find the drive to be unallocated or not initialized in Disk management.
Even though you try to initialize the disk from Disk management an error “Cannot initialize disk” comes up. The immediate course of action is to understand the causes in order to fix data error cyclic redundancy check.
“Regardless of the storage device, if the drive becomes inaccessible, Remo Recover: advanced data recovery software can quickly bypass corrupt file systems and recover data by recognizing files using file signatures.”
Event 2: Learning the causes of error Cyclic Redundancy Check:
As soon as you encounter a CRC error, it becomes very beneficial to learn what causes these errors. Some of the major causes of CRC errors include:
Shutting down the computer while hard drive is connected to it
Ejecting the external hard drive while writing process is being carried out
Presence of bad sectors on storage device
Severe virus or malware infection
Cluttered hard drive or registry errors
These above listed reasons cause logical errors except bad sectors. Bad sectors on the hard drive are formed due to physical damage or wear and tear during read/write operations on the storage device like SSD or flash drive.
Did you know?
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Bad sectors on a storage device can further harm your drive and Windows data existing on the drive. You can create a disk image that has contents and structure of all the data existing on the hard disk. Stick to the end of the article to know the safest way to recover data by creating a disk image.
'Remo recover creates a disk image by skipping all the bad sectors that are causing data error. This disk image is saved on a different hard drive or storage location which can then be used to recover data without any corruption or CRC errors.'
Event 3: Use free ways to repair data error Cyclic Redundancy check
There are various methods to fix the Cyclic Redundancy Error on External HDD. Here are a couple of handy techniques for resolving CRC error:
Fix data error (Cyclic Redundancy Check) using CHKDSK Utility
Computer has built in program to find and fix system errors. Even, this tool helps in eliminating bad sectors from further usage. Let’s see how to use Disk Utility to solve the CRC error-
Connect external hard drive OR to computer and select it using mouse
Right click on it and select Properties from the context menu
In the properties window, select “Tools”tab
Then, under error checking, click on “Check Now” button
From the next window, select both “Automatically fix file system errors”and “Scan for and attempt recovery of bad sectors” and click on “Start” button
Wait until you get a dialogue box as seen below :-
Removing CRC errors using CHKDSK Command
Run command prompt as administrator by typing in CMD in the search box on task bar and right click on the command prompt suggestion to select Run as administrator option.
Find the Windows drive letter by opening This PC or File explorer and look for external drive or partition that has Cyclic Redundancy Check error to note the drive letter.
In the command prompt window type “chkdsk drive letter: /f” ex: if the drive letter of the storage device or partition that has CRC error is “k” then the command is “chkdsk k: /f”
The suffix “/f” is used to fix drive errors. The scan takes a while and fixes any logical errors as shown below
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How to solve Cyclic Redundancy Check error using SFC scan:
SFC or system file checker is a tool that scans all protected system files of the operating system including registry files and replaces them with a copy from a cached folder. However this method can cause data loss if the data error is caused due to bad sectors or virus
Using the steps below SFC scan can solve CRC errors due to registry corruptions as well:
Open command prompt by running it as an administrator.
Type the command sfc /scannow and the file checking process begins as shown below
After a brief amount of time if you see the message “Windows Resource Protection found corrupt files and successfully repaired them”, restart your computer and reopen the drive without any error.
If you see the error message “Windows Resource Protection found corrupt files but was unable to fix some of them”, you would need a more safer and trusted approach like using a data recovery software capable of creating a disk image.
“Built with a deep scan engine that can rigorously look for lost files beyond file systems, Remo Recover can recover data from each sector of the hard drive. With the help of its 'Save Image File' option you can protect your drive and data from further damage and still recover data on Windows or Mac computer.”
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Event 4: Recover data from inaccessible drive using data recovery software
Data recovery software, especially Remo Recover can be an excellent work around to data errors indicated by Cyclic Redundancy Check. When corrupted data is accessed multiple times, there are greater chances of data loss.
Additionally when the memory card, HDD or SSD has bad sectors, continuously trying to read from the sectors can completely eliminate the chances of data recovery as it further damages the sector.
Hence a successful attempt to solve the CRC errors using any of the free methods would still mean that you might not get hands on your precious data. To strictly counter this issue Remo Recover is built with an option to Save Image File.
This option allows the software to create an image that has all the contents and structure of data intact in one single file. All the bad sectors are skipped while creating the image and therefore you can later use this disk image to recover data without any further damage.
Safest way to fix data error (Cyclic Redundancy Check):
Step 1: Download and install Remo Recover on the computer
Step 2: Connect the external drive or memory card which has data error to the computer. Note: Avoid this step if you cannot initialize disk which is internal
Step 3: Launch Remo Recover, and select Recover Drives from the main screen
Step 4: Choose Partition Recovery from the following screen, choose the corresponding drive and from the Tools drop down menu on the top right corner choose “Save Image File” option
Step 5: Browse for a different physical drive other than the one you are trying to create an image for and save
Step 6: Now go to Tools menu again and select open image file and browse for the previously saved location of the Image file
Step 7: You will now be able to see the image file under Drive Images(storage devices) section, select it and click on next arrow
Step 8: After a brief scanning you will find drive image and partitions listed under Drive images (Drives/Partitions) section. Choose the option according to date and size and click on next arrow.
Step 9: You will find a list of all the files and folders that were inaccessible due to CRC data error. Use Smart Scan to implement a deeper search mechanism or just select files you wish to recover and click on next arrow and save the files to drive.
Step 10: Once you have successfully recovered data from inaccessible drive, format the drive and consequently fix the data error Cyclic Redundancy Check. This way your data is safe and drive can be reused as it is CRC error free.
HomeYodot RAR RepairRepair RAR after CRC Error Corruption
RAR is basically a file format utilized for transferring bulky files and folders over the network by compressing them with the help of numerous compression algorithms or techniques. In other words, compressing multiple files into a single file called RAR archive.
RAR file is a proprietary file format, but we often come across situations where RAR files can get corrupt or damaged. Most of the times, these corruptions are caused because of CRC error. A CRC error message pops up whenever unwanted bits get induced to the data or if the storage media itself is damaged (scratches). Due to which the system fails to perform Cyclic Redundancy Check and this in turn limits the unzipping action of the RAR archive making the files present in it, inaccessible.
So, various reasons are responsible for CRC error corruption in RAR archives like error while copying the file, virus infection, bad sectors in the storage disk, transmission error, partial download of the RAR files and many more. Therefore the only way to get back your important files is by the use of efficient third party RAR Repair tool.
Why it is popular?
Yodot RAR Repair is a competitive repair application that can easily repair and extract files from a corrupted RAR archive that got damaged due to CRC error. It can handle corrupted RAR files of any size and can even fix password protected archives. It is a handy repair tool which can be used by anyone without much technical know-how and moreover the whole repair process ends in just 3-4 easy steps.
Steps for using the software
Let’s have a look on the steps which are to be followed during the repair process:
Download Yodot RAR Repair tool
Install it in your PC and launch the software
Follow the steps as seen on the window
Select the damaged RAR file, which need to be repaired
Begin the repair process by hitting on the 'Repair' button
As the repair process finishes, you can see the structure of the repaired RAR file
Save the repaired contents to the desired destination folder
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Suggestions
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Backup regularly to protect your data from unforeseen corruptions
Avoid having interruptions during file transfer like sudden shutdown, power failure, internet connection error