By Ailsa / Last Updated May 25, 2020

What is RAW partition?

The RAW partition is a partition which has not been formatted with the file system neither FAT12/FAT16/FAT32 nor NTFS/NTFS5. Besides, RAW disk it used to refer to hard disk access at a RAW, binary level, beneath the file system level, and using partition data at the MBR. Sometimes, if a RAW partition shows on your computer, you could not access it, not to mention editing or copying the documentation inside.

The Scenario

My father bought a WD My Passport Ultra 1TB external HDD last month. He copied about 3GB of data onto it. It was plugged into the PC after 2 days and a massage came up saying that it has to be formatted. The external hard drive shows Simple Basic RAW Healthy Primary Partition on my PC and no drive letter as well. I get the following error message when I try to format it: Virtual Disk Manager The format did not complete successfully. I just need to format it as NTFS that I can use it again; I don’t care the data on it. Is it possible to recover RAW partition to NTFS?

Healthy Primary Partition RAW in Disk Management

Why Healthy Primary Partition became RAW?

The healthy primary RAW partition could be caused by a number of reasons such as virus infection, format failure, accidentally shut down OS, power outages, etc. How to do RAW partition fix easily in Windows 7/8/10? There are few ways you could choose from.

How to Fix a RAW partition in Windows 7/8/10?

If you stuck in RAW partition in external hard drive or inside local disk, the following ways will show you how to do.

Fix #1: Use chkdsk command to fix healthy primary partition RAW file system

Enter cmd at the search box on the desktop, choose Command Prompt.

Type the following command:

Chkdsk n: /r (the n is the RAW partition you want to fix; /r means locate bad sectors and recovers readable information)

If you receive this message “Windows has made corrections to the file system. No further action is required” after executing, your RAW partition problem should be solved. Sometimes, you will get an error stating CHKDSK is not available for RAW drives, you can try the next one.

Fix #2: Using DiskPart to fix RAW partition

Enter diskpart at the search box on the desktop, right click it and choose Run as Administrator.

list disk

select disk n (where n is the RAW hard drive)

attributes disk clear readonly


create partition primary

select partition # (# is the volume letter of RAW partition)

active (if it is the boot drive)

format fs=ntfs label=new quick (or format fs=fat32)


If it does not work, the below text will give you clue.

Fix #3: Fix with AOMEI Partition Assistant Standard

To fix healthy primary partition RAW issue in Windows 7/8/10, AOMEI Partition Assistant Standard will help you out. It allows you to format RAW partition to NTFS, FAT32, exFAT, Ext2 or Ext3. Just download and install it. The steps are listed below:

Connect the external hard drive along with RAW partition to the computer, if the RAW partition is inside of the hard drive, just ignore it.

1. Run the AOMEI Partition Assistant Standard, right click the healthy primary partition stating RAW and choose Format Partition at the drop down list.

Format Partition

2. Select FAT32, NTFS or other file system for your external RAW partition or the inside RAW partition, and then hit OK.

File System

3. Press Apply to commit to format the healthy primary partition for RAW problems.

Apply Format RAW Partition

Final words

After the several ways, the RAW partition problem would not bother you again. In addition, AOMEI Partition Assistant Professional will provide more powerful functions like allocate free space from one partition to another partition, command line partitioning, migrate OS between MBR and GPT disks, dynamic disks and volumes management, convert system disk between MBR and GPT, etc.