How to hide drive from cmd and How to make a boot able pen drive

How to hide drive from cmd:
Go to CMD: diskpart

:list volume
:select volume (number of volume; like 3)
:remove letter (name of volume; like e)

To retrieve :
select volume (number of volume; like 3)
:assign 

it will back successfully .

How to make a boot able pen drive: 
cmd: diskpart
:list disk
:select disk (number of your pen drive like; 1) (Please be careful to select disk, Disk 0 is always may hard disk) 
:clean ( to format all )
:create partition primary
:active
:format fs=fat32 quick
:assign