Windows CMD – Disk Partition and Format with DiskPart

NOTE: This is not put in code as it can be VERY difficult reverse the process below. ONLY do this if you have a clue of what you are doing .

This process has been tested on a USB Hard Drive, Thumb Drive, and Physical (Internal to computer) Hard Drive

Partition Modification:

1. Open an elevated command prompt.
2. Run diskpart

   diskpart
   

3. List Disks

   list disk

   Note the disk number that corresponds to your USB drive (it should be obvious going by size)

   Example:

   DISKPART> list disk
   
     Disk ###  Status         Size     Free     Dyn  Gpt
     --------  -------------  -------  -------  ---  ---
     Disk 0    Online          160 GB      0 B        *
     Disk 1    Online           28 GB      0 B
   
   DISKPART>
   

4. select disk X where X is the number from step 4

   select disk 1
   

5. List Partitions

   list partition
   

   There could be multiple partitions

6. Select the partition

   select partition 0

7. Delete the partition

   delete partition

8. Select the partition

   select partition 1

9. Delete the partition

   delete partition

10. Create a primary partition – IMPORTANT

    create partition primary

11. List volumes – IMPORTANT for next step as this will list the drive letters.
    You should notice that your drive is labeled as “RAW” in the “Fs” column this is the drive letter for the disk we just worked on

    list volume

12. Exit DiskPart

    exit

13. Format Disk – depending on your preferred type use ONE of the commands below.
    NOTE: In the example code g: is the drive letter for the drive we just worked with.

    format g: /q /c /FS:FAT32 /v:32GB

    format g: /q /c /FS:NTFS /v:32GB

    Securely Format, the 7 can be set at any number

    format g: /p:7 /x /c /FS:FAT32 /v:32GB

    format g: /p:7 /x /c /FS:NTFS /v:32GB

Exit Command Prompt (type exit or just close the window)

Referenced From: http://superuser.com/questions/536813/how-to-delete-a-partition-on-a-usb-drive