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How To Fix Undetected File System Problems



Over the past few days, some of our users reported that they encountered an unrecognized file system.



I have 2TB external storage which is working fine. But as of last week, when I unplugged the USB drive from the power source before removing it, the hard drive is no longer readable.

When I plug in a USB drive, the following message appears:

I tried to fix this in terminal too:

  discuss forced unmounting of / dev / disk2discussion / dev / disk2 

This leads to this error:

  Error starting file system restore for disk2: file system not recognized (-69846) 

Can anyone help me?


unrecognized file system

The terminal command sudo gpt -r show / dev / disk returns the following:

gpt show: device ‘/ dev / disk3’ cannot be opened: resource busy

(also after umountDisk )

The terminal command sudo fdisk / dev / disk returns the following:

  Disk: / dev / disk3 Geometry: 1003/16/63 [1011242 sectors]Sector size: 4096 bytesSignature: 0x0         Start end end #: id cyl hd sec - cyl hd sec [initial size]-------------------------------------------------- ---------------------- 1: 00 0 0 0 - 0 0 0 [0 - 0] not used 2: 00 0 00 - 0 0 0 [0 - 0] not used 3: 00 0 0 0 - 0 0 0 [0 - 0] not used 4: 00 0 0 0 - 0 0 0 [0 - 0] not used 


To fix the “Volume does not contain a recognized file system” error in Windows 10/8/7 without data loss, the first thing to do is find out why this error occurs. Why are you getting the error?

As you know, the most likely cause is file system errors. If your device detects a file system error, it will launch RAW. This is not really a file system type, but it presents a problem for your disk. This usually happens when the file system type information is missing or incompatible across multiple system tables. Filesystem errors that can lead to the issue under discussion include:

  • The file system of your storage device is not recognized by your computer.
  • Your device’s file system is missing.
  • Your device is not formatted correctly or the file system is damaged.

Similar errors occur if you have already forcedunplugged the external hard drive without first “safely removing” it. After determining the cause of the error “The volume does not contain a recognized file system”, it becomes very easy to fix it without losing data.

How To Fix The Error “The Volume Does Not Contain The Recognized File System”

After restoring files to a damaged volume, we can try some solutions to fix the error. You can find effective solutions online here.

Solution 1: Run SFC scan

The SFC Utility is a built-in Windows tool that allows you to scan your computer for missing or corrupted system files and repair problem files by replacing them with the correct files downloaded from Microsoft servers. This utility can be run from the command line.

Step 1 Type cmd in the search box next to the Start button and right-click Command Prompt to select Run as Administrator.

Step 2 At the command prompt, enter sfc / scannow and press Enter.

Solution 2. Run CHKDSK

Step 1 Start again the command line as administrator.

Step 2 Type chkdsk f: / f and press Enter.

Note. Q. This means the command will scan the F: section to find errors and fix them. You must replace it with the correct drive letter on your computer.

Step 3 Wait for the process to complete, then restart your computer to check if the volume is recovered.

If disk check is blocked with the error message “File system type is RAW. CHKDSK is not available for RAW disk ”, this volume is now a RAW file system. In this case, you will have to reformat the drive to make it available again.

Solution 3: Format the volume

There are many methods for formatting a partition, such as formatting in Explorer, Command Prompt, Disk Management or Disk Partition Software. In this section, we will format the partition in Disk Management.

Step 1 Open Disk Management.

Right-click the Start menu and select Disk Management to open it. You can also start Disk Management next As such: right-click “This PC”> “Management”> “Disk Management”.

Step 2 Right-click the section you want to format and select the Format option as follows:

Step 3 Selection Select the file system type and click OK to allow the system to format the partition.

If Windows is unable to complete formatting, there must be bad sectors on the disk. In this case, you may need to check and repair the bad sectors.

Solutions 4. Check and fix bad sectors

DiskGenius is a free hard disk partitioning software, and the free version can check and repair bad sectors for you. Here are the instructions:

Step 1 After starting DiskGenius, select the disk or hard drive on which you want to check bad sectors and click Tools> Check or Fix Bad Sectors as follows:

Step 2 Click the Check Confirmation button and DiskGenius will start scanning the disk.

Bad sectors will be marked as blocked Bathrooms (damaged) are red and you will have to wait for the process to complete.

Note. Checking for bad sectors is read-only and does not affect the hard drive or data. However, recovering bad sectors can corrupt data stored in or near bad sectors. Therefore, when you need to restore sectors, you must first back up the data.

You may also be interested in:

Fixed: file system type – RAW. CHKDSK is not available for RAW players

Fixed: hard drive must be formatted on disk before it can be used.

How do I resolve the “File or directory is corrupted and cannot be read” error?



How convert RAW to NTFS without formatting?

How to convert RAW to NTFS without formatting
  1. Find and analyze your RAW hard drive.
  2. Find and view the data found on the RAW disc.
  3. Recover and save data from RAW disk.
  4. Open This PC (Windows 10), right-click the RAW drive / partition and select Format.
  5. Select the NTFS file system and adjust other options as needed.
  6. Click Start> OK.

How do I fix the file system is raw?

Therefore, the procedures for correcting the error “File system type – RAW” are as follows: Recover data from a RAW disk. Format the disk.

Procedure 1. Recover data from RAW disk

  1. Find and analyze your RAW hard drive.
  2. Find and view the data found on the RAW drive.
  3. Recover and save data from RAW disk.

How do I fix a corrupted NTFS file?

Recovery and restoration of the NTFS file system. Step 1: Open EaseUS Partition Master on your computer. Then locate your hard drive, right-click on the partition you want to check and select Check File System. Step 2: In the “File System Check” window, leave the “Fix any errors if found” option selected and click the “Start” button.