How to format a disk without an operating system

Disks can be formatted at any time and from any operating system except; you cannot format a disk if your OS is turned on. You may be able to partition the disk but to format the entire disk, you need to be able to access it from outside the OS you are using.

To access a disk from an external operating system, and the format requires a device that can run from the boot machine. There are a few tools available but we recommend that you use the Windows 10 installation disk for the job.

Format a disk without an operating system

To format a disk without an operating system we do that

  1. Create a Windows 10 installation disk.
  2. Install the first shoe tool.
  3. Boot from the installation disk and access Command Prompt and Diskpart.
  4. Run a set of commands to format the disk.

1. Create installation media

To create Windows 10 installation media, you need a USB driver that has 8GB storage space.

  1. Connect the USB driver to the system you use to create the installation disk.
  2. Visit this link to download Media Creation Tool from Microsoft.
  3. Click on the Download tool button.
  4. Run the machine.

  1. Select any version of Windows 10 and select your USB to burn.
  2. Allow the Media Creation tool to create the installation disk.
  3. Remove the USB driver once the disk is created.

2. Set up Boot tool

You now need to go to your BIOS and first plug in the USB device. If you have BIOS and UEFI, check out this post to find out how to change the first boot device.

3. Boot from the installation disk

You are now ready to use the Windows 10 installation disk to access Command Prompt and the Diskpart tool

  1. Power to system off.
  2. Attach the Windows 10 installation disk/ USB into your system.
  3. Turn the Forward system and boot from the USB.
  4. Wait until you see the Windows 10 Setup Screen.
  5. Select language, time and keyboard layout, and click Next.
  6. Click on the Repair button at the bottom of the next screen.
  7. On the next screen, select Troubleshoot> Command Prompt.
  8. A. Prompt sash window opening.
  9. Enter this command in start the Diskpart tool: diskpart.
  10. Tap on it Enter.

4. Shape a disk

The Diskpart tool is now active. You can run the following commands to configure the internal driver on the system, or any other driver connected to it.

  1. Make a list of all connected disks with this command: list disk.
  2. Note the number assigned to disk you want to shape.
  3. Select the disk you want to format with this command: select disk number (replace ‘number’ with the number assigned to the disk).
  4. Remove all separations from disk with this command: clean. This will remove all partitions from the disk.
  5. You can now the shape of the disc using one of these commands;
    • For FAT32 file system: format fs=fat32
    • For NTFS file system: format fs=NTFS
    • For exFAT file system: format fs=exFAT
  6. Once the format is ready, close the Command Prompt window, and shut down your system.


There are many tools that you can burn to USB and use to format a driver. Most of these tools offer a more refined UI where you don’t have to enter commands to format a disk but they can, in the long run, create problems. That is why it is a better idea to use Diskpart. You have to go through the process of creating Windows 10 installation media which is a bit time consuming but that is the only hard part of the whole process.

The post Demonstrate how to format a disk without an operating system first on TechtricksNg.

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