Fix Data Error Cyclic Redundancy Check | Remove CRC Errors in 2021

Jean updated on Dec 15, 2020 to Data Recovery Resouce | How-to Articles

Stay calm if your computer prompts "Drive is not accessible. Data error (cyclic redundancy check)." With the cyclic redundancy check error, you can neither access files nor the storage device on your computer. Follow methods on this page to fix this error and apply EaseUS data recovery software to restore all your lost files with ease.

CRC Errors: Data Error Cyclic Redundancy Check

Mostly, the Cyclic Redundancy Check (CRC) error would occur in two situations: 

1. Drive is not accessible, data error (cyclic redundancy check)

"My 1TB Seagate Free agent GoFlex has some error in opening the disk. First, it asked me to format the drive before being able to use it. I canceled that dialog as I have many files saved on it. An error message appeared, saying: 'Drive is Not Accessible: Data Error (Cyclic Redundancy Check)'."

Drive is not accessible- data error (cyclic redundancy check)

2. Cannot initialize disk: cyclic redundancy check

"How can you fix an external HDD that fails to initialize? It gives 'Virtual Disk Manager. Data error (cyclic redundancy check)' each time I try to initialize the drive."

cannot initialize disk - data error (cyclic redundancy check)

So what is a cyclic redundancy check error?

The CRC error is an error-detecting technology 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. This error occurs when there's a bad spot on the media of your hard disk. 

This error can also be triggered by many other incidents that seem to be inevitable. For example, registry corruption, a cluttered hard disk, an unsuccessful program installation, or misconfigured files. Generally, when you receive the error message 'data error (cyclic redundancy check)', there is something wrong with the files or the hard drive.

How to Fix Cyclic Redundancy Check Data Error - 6 Fixes

Besides preventing us from copying files, accessing hard drive data, or initializing a hard disk, the data error detected by cyclic redundancy check will potentially cause system failure on the computer or data loss on the hard drive. Thus, it's necessary and urgent to fix the CRC error. Here are 6 ways you can apply:

Method 1. Fix CRC Data Error via CHKDSK

With the CHKDSK utility in Windows, you can scan for and repair a drive's errors or file corruptions that cause the cyclic redundancy check data error.

Detailed steps to remove CRC error with chkdsk command:

Step 1. Open "Command Prompt":

Press Windows + R keys, type cmd in the Run dialog, and click "OK".

Step 2. Enter chkdsk E: /f in Command Prompt and hit Enter.

Replace 'E:' with the drive letter of your hard drive to run the scan on.

You can also type chkdsk E: /f /r /x to find and fix all found errors on your target device.

Run CHKDSK to fix Cyclic Redundancy Check error

Step 3. Wait for the scan to complete and type exit to close the window.

Once the disk is checked and repaired, restart your computer to see if it worked.

Method 2. Fix Error using Disk Check

The Disk Check utility in Windows File Explorer can also help to scan and fix all found file system errors that cause a device inaccessible with CRC error.

Here are the steps that you can apply to fix the CRC error from your drive:

Step 1. Open Windows File Explorer, right-click the inaccessible hard drive or device, and choose "Properties".

Step 2. Under the Tools tab, click the Check button at the Error-checking section.

Step 3. Choose "Scan drive" or "Repair drive" if errors were found.

check disk errors in Windows 10 drive tool in Propertities

When the scanning finishes, restart the computer and check if you can reopen the device and use the saved data again.

Method 3. Remove CRC Data Error with SFC - System File Checker

Windows system files generally include hardware drivers, configuration files, Windows DDL files, and other files that make up the Windows registry. As mentioned above, registry corruption may lead to a data error on your computer.

Thus, running the System File Checker tool to repair the missing or corrupted system files on your computer is helpful to fix the cyclic redundancy error resulted from system file corruption.

Step 1. Click "Start" and type cmd.

Step 2. Right-click "Command Prompt" and choose "Run as administrator".

Step 3. If you are using Windows 10, type the command "DISM.exe /Online /Cleanup-image /Restorehealth" first to make a Windows image to protect your data.

Step 4. When the DISM command has completed, type "sfc /scannow" and hit Enter.

After this, you can restart the computer and try to reopen the device to use the saved data there again.

Method 4. Recover Data after Fixing CRC Error

After following Method 1, 2, 3, the error should be removed by then. And you can reopen your storage device and use the saved data again.

However, if you find yourself in one of the following situations, you will need to perform data recovery to rescue your files:

  • Error message 'Data error (cyclic redundancy check)' still pops up.
  • You find important data was cleaned along with the errors.

To recover data from an inaccessible hard drive or retrieve files removed by the command lines, reliable hard drive recovery software - EaseUS Data Recovery Wizard can get back your files. 

The pro version of EaseUS Data Recovery Wizard allows you to recover unlimited files after the payment. Follow the 3 steps to restore your data from the device with Cyclic Redundancy Check error:

Step 1. Run hard drive data recovery software.

Select the location of the hard drive. Let the program scan the drive by clicking "Scan".

Select a location to scan

Step 2. Scan and find hard drive data.

After the scan, you can check and preview the found files. Click "Filter" to find a specific file type. Or you can search for wanted data in the searching box. After that, you can double-click each file to preview it.

Scan and find wanted data

Step 3. Restore data on the hard drive with Cyclic Redundancy error.

Choose all found files on your hard drive and click "Recover". Specify an empty external storage device or a safe location for saving lost data. Click "OK" to start restoring your lost data from cyclic redundancy error.

Recover data to save location

Method 5. Format to Fix Device with CRC Error

If your device still has CRC device error, the last effective DIY method you can try is to format the drive, resetting the file system to a readable format. Here are the steps for you to go:

Step 1. Press "Windows key + E" to bring up Windows Explorer.

Step 2. Right-click on the problematic external hard drive or internal drive and select "Format".

Step 3. On the format window, select the desired file system - NTFS for your device.

Step 4. Check "Quick Format" and click "Start".

format SD card using file explorer

Method 6. Send for Manual Repair

DBR (DOS Boot Record) corruption on your hard disk can also result in 'data error (cyclic redundancy check)' on your drive. If none of the fixes works, you can send your hard drive for a repair.

Hope as least one of the solutions above can help you fix the error.

What Causes Data Error Cyclic Redundancy Check Error

The "Data Error Cyclic Redundancy Check" error could be caused by the following reasons:

  • Corrupted file system on storage devices
  • Interrupted file transferring process
  • Misconfiguration in files and storage devices


On this page, we explained what is the cyclic redundancy check error and how to fix this issue without losing any data. We also explained the causes of this error.

If you have precious files on your drive, remember to run EaseUS data recovery software to scan and find your file first. Then run the fixes on this page to remove this error and make your drive work normally again.

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Frequently Asked Questions

1. Why choose EaseUS Data Recovery Wizard?

"EaseUS Data Recovery Wizard is the best we've seen. It's far from perfect, partly because today's advanced disk technology makes data-recovery more difficult than it was with the simpler technology of the past, but it's fast and efficient..."PCMag

"The first thing you'll notice about EaseUS Data Recovery Wizard Pro is that its interface is very clear and uncluttered, with only a small collection of self-explanatory controls. You won't find lots of extra options hidden in a system of hidden menus, either; what you see really is what you get."techradar

"Recover lost files, even after deleting a partition or formatting your drive."Macworld

2. Why cannot I recover 2GB data for free?

It is recommended to check the version installed is Free or Trial because they are different versions.

Trial has data preview function but cannot save any files, while the Free version enables to recover 2 GB files. The default free space is 500 MB and you may share the product on social media to get another 1.5 GB.

3. Why cannot the recovered files be opened?

A file is saved as 2 parts on the storage device: directory info (which is comprised by file name, time stamp and size info, etc.) and data content.

If the files with original file names and folder structures cannot be opened, one possible reason is the corrupted directory info. There is still a chance to recover the data content with the RAW Recovery method in our software.

4. Why isn't it suggested to recover the files back to the original drive?

The storage structure of the lost files would be altered or damaged by any changes on the drive. If you save the recovered files back to the same drive, the original data structures and data content would be corrupted or overwritten, which causes permanent data loss. So you should prepare another disk to save the files.

5. How can I check whether my data is recoverable or not before purchase?

The Free version helps you save 2GB files, so verify the recovery quality of our product before purchase.

6. How long does it take to scan the drive?

It strongly depends on the capacity of your hard drive and the performance of your computer. As reference,most drive recoveries can be completed in around 10 to 12 hours for a 1-TB healthy hard drive in general conditions.

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