The Volume Does Not Contain A Recognized File System – How To Fix

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What Is File System

With assigned name, file is a set of collections of associated character stream or associated records. A file consists of two parts: file body (the real file information) and file description (file storage and management information). In operating system, file system usually refers to the software and data associated with file managing. It is responsible for creating, revoking, reading/writing, modifying and copying files and accessing file by name. Meanwhile, file system plays an important role in access control.

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Generally speaking, file system is a directory structure included in a disk (such as CD-ROM, floppy disk, flash drive and other storage device) or partition and used to organize files in that disk. An available disk device can comprise one or more file systems. Anyone who wants to enter a drive must mount file system at the very beginning.

File system specifies file naming rules, which include the maximum number of characters in file name, available and unavailable characters and the length of filename suffix. Before a partition or disk can serve as a storage device, initialization is necessary to write data recording structure to disk. This process is called file system establishment.

In conclusion, the functions of file system include: file storage space management and scheduling, providing logical structure, physical structure and storage method of files, implementing the mapping from file identification to actual address, realizing file control operation and access operation, file information sharing and providing reliable file security and protection measures.

A common file system has the following wonderful features:
1.User-friendly: users only need to manipulate files, regardless of the file structure and physical storage location.
2.User-transparent: files are saved and accessed by name, and it is transparent to users.
3.Some files can be shared by multiple users or processes.

If you want to understand file system clearly, the following aspects are important:

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  • Storage media: hard disk drive, floppy disk, flash drive and network storage device are all able to be adopted by users to save personal data.

  • Division of disk: division is for large-capacity storage device (mainly refers to hard drive). For a large hard drive, we need to consider reasonable partitioning. This is why division is involved.

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    In Windows and Dos, fdisk is usually used to divide hard drive. Besides, many hard drive management tools are designed to help users manage and make the best use of their computer hard drive.

  • File system mounting: in Unix-like operating systems, a file system can only be put into use after mounting. In Windows, the situation is the same. Apart from that, mount point is essential.


  • Visual geometry: used to organize and arrange file storage and access, file system is also visible. In Linux, we can see its structure through tools such as ls.

The Volume Does Not Contain a Recognized File System Problem

During computer using, the volume does not contain a recognized file system problem occurs now and then. Many users have reported encountering file system unrecognized problem once before. And the results show that this issue is occurred in not only computer hard drive, but also external devices, such as external hard drive, USB flash drive and SD card. Now, let’s take a look at some cases of this problem.

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1.You open computer as usual and then double click a hard drive partition, hoping to enter it and access files. At this time, a dialog box appears surprisingly, telling you that this partition is not accessible. It also says “The volume does not contain a recognized file system”. And you have no choice but to click “OK” to give up on entering this partition.

In most cases, above mentioned phenomenon is occurred in hard disk because the partition table is damaged. So, it is similar to a new partition which has not been formatted yet. In this case, you must format the partition again to make it back to normal. However, this is not recommended unless all files saved in that partition are of no use.

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2.The second situation is that the external disk drive suddenly became RAW when you access it from a normal working computer. This may happen if you have ever forcibly unplugged your external hard drive from computer. Also, if you want to get back data from it, please don’t perform any operations to it.

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3.Removable devices are a little bit like external hard drive; they both have the following features: good portability, small size and high security. The difference lies in that the capacity and size of external hard drive are usually larger than that of other removable disks like USB flash drive and SD card.

Don’t rush to recover data from RAW partition if you find your USB flash drive or SD card suddenly became RAW in computer. You may as well try the following methods firstly.

When USB flash drive becomes RAW:
  • Launch Winhex and open disk under the tool menu. Try to open your USB flash drive directly. If this works, you’ll be able to browse your folders and files. At this time, you only need to copy them out to another safe location.

  • If your USB flash drive is formatted with exFAT, you need to download and install appropriate disk format support package before you can browse files in it.

  • If your USB flash drive is formatted with common file systems like FAT and NTFS, you may need to check the device interface and computer USB interface.

  • If the file system of USB flash drive is damaged, RAW partition recovery is unavoidable.

When SD card becomes inaccessible:
In the high-tech era, SD card has a wide using range since it is a must-have thing for many digital storage devices. The capacity of SD card is increasing and most of us are used to storing important personal data in it. Thus, once problems like file system unrecognized appear, users will be desperately disappointed. Here are some helpful tips for you.
  • If the volume does not contain a recognized file system error occurs on your mobile phone/camera SD card, you may as well turn it off and wait for some time to restart it to see whether this problem has been fixed or not.

  • If it doesn’t work, you have the right to suspect CPU, newly installed programs or optimization operations.

  • Of course, the widespread computer virus can travel a long way to attack your SD card. So, please be careful when you connect your SD card device to internet or try to manage the card on others’ computer.

To sum up, the following reasons could lead to file system unrecognized problem: system reinstall, virus attack, misapplication, abnormal shutdown, file system conversion failure, accidental deletion of necessary system files, bad sectors, unstable power supply, insufficient power supply, and so on. Please pay much attention to those aspects so as to try to avoid data loss and the cumbersome RAW partition recovery work.

Introduction to RAW File System and How to Fix It

If you’d like to recover data from RAW partition/file system, we think it’s necessary for you to know something about RAW file system in advance.

volume does not contain a recognized file system 7 A disk partition which has not been formatted by NT file system is called a RAW partition. If you check properties of a RAW partition, you’ll find both the used space and unused space are displayed as “0”. How could that be? In fact, RAW partition is just regarded by the OS as an uninitialized drive, so you’re not allowed to access it or use it for data storage. What are the possible reasons that could turn a normal partition into a RAW one?

Of course, system reinstall is one of the major reasons of unrecognized file system appearance. If you see a few RAW partitions after you have finished installing your OS, it is very probably that the file system of them is exFAT. This file system is not supported by operating systems which haven’t been updated in time. Besides, RAW file system could easily be caused by virus invasion, MBR damage or partition table failure.

But remember, no matter what the reason is, the first thing you should do in such case is always to recover data from RAW partition, unless all the data in that drive are useless to you. But we bet this is not the actual case most of the time. After RAW partition data recovery was completed, you could try to fix hard disk boot record, rebuild partition table and reformat the unrecognized drive in order to make it usable again.

Recover Data from RAW Partition

No matter what you decide to do after encountering volume does not contain a recognized file system error, you have to recover data from it first. Otherwise, you may lose your needed data forever and it leaves you no chance to regret. Of course, you can skip this part talking about how to recover data from RAW file system, partition and hard drive efficiently, if your data in that drive are of no use. But if you do need to get back some significant data from the file-system unrecognized drive, this part will be very helpful.

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First of all, please get to know about MiniTool Power Data Recovery. Designed and released by MiniTool Solution Ltd., MiniTool Power Data Recovery made its debut in August 1, 2006. Now, 9 years passed and it becomes more and more powerful in recovering lost data. 6 editions are provided to satisfy users’ different needs.

volume does not contain a recognized file system 9 Free Edition is designed for home & personal computer users; Personal License could help users break the limitation of 1GB free data recovery; Commercial License is suitable for users to use in commercial environment; Enterprise License is used for organizations, companies, schools and governments (and it can be used on an unlimited number of computers within a single business environment); Technician License is particularly useful for those who’re providing consulting services to multiple clients/companies; and Bootable Edition is able to rescue users’ vital data when the system is crashed and computer can’t be booted successfully.

Except for Bootable Edition, there are five functional modules included in other editions of MiniTool Power Data Recovery: “Undelete Recovery”, “Damaged Partition Recovery”, “Lost Partition Recovery”, “Digital Media Recovery” and “CD/DVD Recovery”. In bootable edition, the “CD/DVD Recovery” is missing. Just because Power Data Recovery is equipped with those functional modules, it can take effect in various data loss cases.

For instance, accidentally deleted useful files; partition is damaged somehow or accidentally formatted by users; one or more partitions are missing from hard drive due to various reasons; files are lost from multimedia storage devices; some data are lost from CD/DVD. No matter what is the cause for your data loss, you can try MiniTool Power Data Recovery to regain the lost files and folders very easily.

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The recovery process just comprises of 3 steps: choose the most suitable functional module from main interface (after seeing the specific usage by putting cursor onto them) -> select the drive which includes lost files/folders and scan it -> check all needed data in the scanning result interface and save them to another safe drive.

Just follow this tutorial to recover your data. Please don’t worry; you’ll not lose more data during recovery process since this data recovery software has its own data protection mode.

Things You Should Notice

Though a powerful data recovery program could help you get back all of your important data from RAW partition under the condition that they’re not covered by new data, there is still chance that you could lost them forever. So, please try your best to avoid the volume does not contain a recognized file system error so as to avert from unnecessary troubles. Here are some useful tips for you:
  • Try not to unplug your removable device from computer forcibly.
  • Don’t connect your removable drive to and manage it on a computer arbitrarily unless you can confirm its security.
  • Don’t open unsolicited emails and links without checking its safety.
  • Choose to manage computer hard drive/removable disk with the help of reliable software if you really need an assistant.
  • Remember to back up your important data regularly to safe location.

Hope you all can get rid of the disturbing RAW partition error and data loss problem.

Common problems related to partition recovery and our solutions: