Page History

To use a USB stick as a boot device, Windows requires a Master Boot Record (MBR) however some USB sticks are shipped without one and with just a single partition. The USB stick, therefore, needs formatting but the standard Windows format option does not prepare the disk correctly as it does not create a master boot record.  You therefore need to prepare the USB stick using other tools, for example, Windows diskpart.

1. Start an elevated  command prompt. See Running an elevated command prompt for more information.  
   

2. Type:
   

   Code Block
   language text theme FadeToGrey
   diskpart

   
   

3. Type:

   Code Block
   language text theme FadeToGrey
   list disk

   
   
   

4. Identify the disk number of your USB stick.

   Info
   Please ensure that you correctly identify your USB stick.

   
   
   

5. Type:

   Code Block
   language text theme FadeToGrey
   select disk <n>

   Where <n> is the number of the disk previously identified as being the USB stick.  Confirm that the current disk selection is correct by typing in detail disk, this will show information relating to the currently selected disk.
   

   Info
   Note: Please be certain you have the disk selection correct before proceeding to the next step.

   
   
   

6. Type:

   Code Block
   language text theme FadeToGrey
   clean

   This erases all data on the USB stick.
   
   

7. Type:

   Code Block
   language text theme FadeToGrey
   create par primary

   This creates a primary partition on the USB stick using the maximum size available.
   
   

8. Type:

   Code Block
   language text theme FadeToGrey
   active

   To make the primary partition active.
   
   

9. Type:

   Code Block
   language text theme FadeToGrey
   format FS=ntfs LABEL="Macrium WinPE" QUICK

   This formats the newly created partition on the USB stick for legacy MBR booting.
   
   If your system has GPT disks and uses the newer UEFI booting standard then please type the line below instead:.

   Code Block
   language text theme FadeToGrey
   format FS=FAT32 LABEL="Macrium" QUICK

   Info
   Note: UEFI booting requires a FAT32 formatted partition and will not recognize NTFS.

   
   
   

10. Type:

    Code Block
    language text theme FadeToGrey
    exit

    once the format command has completed to exit diskpart.
    
    

11. Type:

    Code Block
    language text theme FadeToGrey
    exit

    Again to close the command prompt.

See also: Troubleshooting USB rescue media