The volume does not contain a recognized file system aka RAW File System

By | March 9, 2019

The error ‘The volume does not contain a recognized file system’ CHKDSK error message, is what I’d call a catch-all error message. It is very generic and it can have multiple causes, but in essence Windows and chkdsk have trouble determining the file system on a volume whether this is on a hard disk or for example a memory card.

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  1. Run ReclaiMe File Recovery Software.
  2. All you need to do is select the RAW drive (Next to the drive letter, ReclaiMe displays the file system. For the corrupt volume it will probably show a RAW file system).
  3. Click Start, wait for the number of found files to settle (often 2 – 3 % into scan).
  4. Select and copy files to another drive.

What causes ‘The volume does not contain a recognized file system’?

Windows depends on certain file system structures such as partition tables and boot sectors to determine the file system. Then once it has done that it needs to access file system structures that depend on the file system such as the MFT (NTFS) or FAT and the root directory (FAT32, exFAT).

For both magnetic hard disks and SSD drives, in general chances for successful data recovery are good. As data was not lost due to deletion by a normal Windows procedure but due to file system corruption, Windows will not issue a TRIM command to the SSD.

Typical symptoms and error messages

  • You need to format the disk in drive before you can use it. Do you want to format it?
  • This volume does not contain a recognized file system. Please make sure that all required file system drivers are loaded and that the volume is not corrupted.
  • Chkdsk can not be run on this drive
volume does not contain a recognized file system

If this pops up click Cancel!

Windows Disk Management lists the file system of the drive as “RAW file system” and may prompt you to format it. However, do not format the drive at this point! This is especially true if the volume is on a SSD drive as Windows will issue a TRIM command which will actually overwrite all data on the volume.

disk management shows partition as RAW

disk management shows partition as RAWAs it is a file system problem, it can happen on hard disks, Solid State Disks (SSD), USB disks and SD memory cards etc.. In my experience removable disks have a higher chance of file system corruption than fixed disks.

Can I repair it?

Depending on the cause, what exact structure is corrupted, the issue can some times be repaired or fixed using software like DiskPatch or TestDisk. In general, if corruption is limited to partition tables or boot sectors, you can repair this ‘in-place’.

Although such an approach may seem tempting, it is not without risk. I strongly suggest you only attempt this after you have made a sector-by-sector backup copy of the disk.

The safe method to recover data from an unrecognized file system. – File Recovery using ReclaiMe

Why ReclaiMe File Recovery?

recover data when volume does not contain a recognized file system

Scenario: “volume does not contain a recognized file system”.

Take a deep breath. File recovery is possible and using ReclaiMe itself is simple and straight forward. Once you have the system set up, you’re just a few clicks and minutes away from recovering your data.

Required license: Standard

We need:

  • A running Windows system. If it is the system drive that is corrupt, you will need to remove it from your computer and attach it to another PC. An inexpensive USB enclosure is a convenient way to attach the disk to another PC or laptop.
  • ReclaiMe.
  • The ‘victim’ disk where you will be recovering data from.
  • A destination disk where you will copy files to.

Steps to recover data from a RAW file system:

  1. Run ReclaiMe File Recovery Software.
  2. All you need to do is select the RAW drive (Next to the drive letter, ReclaiMe displays the file system. For the corrupt volume it will probably show a RAW file system.) and
  3. Click Start.

ReclaiMe will normally almost immediately start populating the folder / file lists. You can already preview text and image files. You can also search for and save files (using the Save button).

The volume does not contain a recognized file system - Recover your data

Wait for the number of files in the left bottom corner if the windows to settle, you can pause the scan (usually 3-5% into the scan). See if the files you need to recover are listed and recover (Save) them. You can resume the scan if needed.

Short video that addresses ‘The volume does not contain a recognized file system’ issue.


 

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