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How to Fix Data Error Cyclic Redundancy Check on External Hard Drive

Updated by Cedric on Apr 16, 2021
Written by Roxanne

How to recover data from a hard drive If CRC error happens (Quick Access)

restore data from RAW drive after fixing crc error

If the Data Error Cyclic Redundancy Check problem occurs because the external hard drive has become RAW, you can run EaseUS disk data recovery which works well in RAW drive recovery to retrieve your data first and then format the disk to repair it for reuse.

  1. 1. Download and Install EaseUS data recovery software.
  2. 2. Select the hard drive or external hard drive and click "Scan"...Read More>>

How to Fix Data Error Cyclic Redundancy Check Error in Windows 10/8/7

Sometimes, when you plug in your external hard drive, SD card, or some other USB devices to PC and try to open it to view or copy your data on the device, you may get the message "Location is not accessible. Data Error Cyclic Redundancy Check". And also you might also be asked to format the disk because the external hard drive has become RAW. Compared with an external hard drive with other brands, this issue seems to be much more severe on Seagate external hard drive and Western Digital external hard drive.

  1. 1. Check Hard Drive Errors
  2. 2. Run CHKDSK
  3. 3. Run SFC Scan
  4. 4. Recover Lost Data

Tip 1. Check Hard Drive for Errors to Fix Data Error Cyclic Redundancy Check Problem

While being prevented from accessing your external hard drive and data, you just want to figure out how to fix the "Data Error Cyclic Redundancy Check" problem to retrieve your files. As we know, at most times, the issue is caused by a number of small errors or file corruptions on a hard disk. 

So, to fix it, you just need to repair the hard drive using EaseUS partition software. Coming with a disk check feature, the program can help you check hard drive for errors and repair the disk for reuse. What's more, it has many other highlights:

EaseUS Partition Tool

Steps to check and fix Data Error Cyclic Redundancy Check error:

Step 1. Right-click the target partition that has a problem. 

Step 2. Choose "Advanced" > "Check File System". 

Step 3. In the Check File System window, check the "Try to fix errors if found" option.  

Step 4. Click "Start" to check errors on your partition.

Tip 2. Run CHKDSK to Fix Data Error Cyclic Redundancy Check

If you are familiar with CHKDSK, you can run this command to repair the hard drive. This command checks the integrity of your hard drive and fixes logical file system errors, bad sectors & file system metadata. It helps solve the Cyclic Redundancy Check error. Follow the steps below to run CHKDSK.

Step 1. Press the Windows key and type cmd.

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

Step 3. Enter the following command. "E" means the drive letter of the partition you want to repair.

chkdsk E: /f /r /x

fix data error cyclic redundancy check external hard drive using chkdsk

If you can't boot into Windows 10 to run CHKDSK, fix the UEFI boot issue in Windows 10 with 5+ solutions.

Tip 3. Run SFC to Fix Data Error Cyclic Redundancy Check External Hard Drive

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. It will scan all protected system files, and replace corrupted files with a cached copy that is located in a compressed folder. Follow the steps below to run SFC.

Step 1. Type Command Prompt in the search bar, right-click it, and choose "Run as administrator".

Step 2. Type the following cmd and hit "Enter".

sfc /scannow

fix data error cyclic redundancy check external hard drive with sfc

If the drive is an external device, follow this command below and replace letter c: with your hard drive letter.

Step 3. Type the following cmd and hit "Enter".

sfc /scannow /offbootdir=c:\ /offwindir=c:\windows

Tip 4. Using a Data Recovery Tool to Restore Files

If the three solutions above all fail to help, you can rescue your files and data at least. All you need is a useful data recovery tool that enables you to get back files from your SD card, external hard drive, and other devices.

EaseUS Data Recovery Wizard is the very tool that you are looking for. It guarantees safe and secure data recovery from all types of storage media formatted in exFAT, FAT (FAT16, FAT32), and NTFS. It has many highlights:

  • Convert RAW to NTFS without losing data
  • Recover deleted files from almost all devices
  • Restore photos, videos, documents, and many other files with ease
  • Supports repairing MP4/MOV/JPG/JPEG/GIF files

You can follow the below steps to recover data from a storage device with CRC error.

Step 1. Select and scan the RAW partition.

Launch EaseUS Data Recovery Wizard, select the RAW partition where you lost your data and click "Scan".

If the RAW partition contains a partition label, you can directly select it to scan for the lost files. 

If the RAW partition lost its label, it will be recognized as "Lost Partition" in the program and you need to select the "Lost Partition" to find the lost data.

select RAW partition and click scan

Step 2. Preview found data from the scan result.

When the scanning completes, check and double-click to preview found files from "Lost Files". 

scan the lost partition to find desired data

Step 3. Recover found data from RAW partition.

Select all found files and click "Recover" to get all the data back. Save the found data to another secure location.

recover all found data from RAW partition


When the "Data Error Cyclic Redundancy Check" error or "Cannot Initialize Disk: Cyclic Redundancy Check" occurs, you will find out that the external hard drive is showing as RAW or disk need to be initialized. Any of the solutions above can do you a favor in solving this error. If you have other hard drive problems or external hard drive errors, you can ask us for more help.

Data Error Cyclic Redundancy Check FAQs

If you want to get additional information, you can read these questions and answers below:

How do I fix a RAW external hard drive without losing data?

  1. 1. Run data recovery software to restore data
  2. 2. Connect your RAW external hard drive to your computer.
  3. 3. Click the "search" icon in the taskbar and input cmd. Then right-click "Command Prompt" and choose "Run as administrator".
  4. 4. Enter chkdsk /f G: (G is the drive letter of your RAW drive) to fix your RAW external hard drive.

Can Cyclic Redundancy Check errors be fixed?

Registry corruption may lead to a data error - cyclic redundancy check 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.

How do I fix Data Error Cyclic Redundancy Check RAW drive?

To remove the Cyclic Redundancy Check error on an external hard drive:

  1. 1. Check Hard Drive Errors
  2. 2. Run CHKDSK
  3. 3. Run SFC Scan
  4. 4. Recover Lost Data

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Updated by Cedric

Cedric Grantham is one of the senior editors of EaseUS who lives and works in Chengdu, China. He mainly writes articles about data recovery tutorials on PC and Mac and how-to tips for partition management. He always keeps an eye on new releases and likes various electronic products.

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Written by Roxanne

Roxanne is one of the main contributors to EaseUS and has created multiple posts on digital devices like PCs, Mobile phones, tablets, Mac, etc. She loves to share ideas with people of the same interest.

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