How to make a Pen drive bootable (Bootable flash drive)

Introduction-

• Why do we need a bootable pen drive?

    According to the boot process,

1. BIOS selects the disk that is set as first priority.
2. Now the selected disc must have MBR(Master boot record) present in it.
3. Now the bootloader is launched and it reads the boot configurations.
4. In the final stage the OS is loaded into the main memory.

• Without the use of software:

1. First step is to open command prompt as administrator. 
2. Open disk management utility by writing command "diskpart".
3. Now the third step is to display the attached disk drives to the computer by the command "list disk"
4. Now we have to select the pendrive which has to be made bootable by the use of command "select disk *", where * is the disk number.
5. Clean the flash drive by using "clean".
6. Now create a bootable partition by the command "create partition primary"
7. Now type "select partition 1" and then press enter.
8. Type "active" to activate the partition.
9. Now we will format the pendrive by using the command "format fs=ntfs"
10. After formatting is done, type "assign" and then press enter.
11. Now the pendrive is bootable and you can copy the installation files.

The disk number will correspond to your pendrive.

• With the help of software(fast n easy):

1. We are going to use Rufus software to make the drive bootable.
2. It uses ISO files directly as installation media.
3. To download Rufus click here.
4. After downloading, run the software.
5. Select the device from the device box.
6. Select MBR partition scheme for BIOS or UEFI.
7. Select file system as NTFS.
8. Choose the format options yourself.
9. Now click on the box " create  a bootable disk using", then select the ISO/DD/Free Dos file.
10. Now click on the start button and wait for the process to complete.
11. Now the pendrive is bootable and ready for installation of OS.