@echo off
(
	set /p line1= 
	set /p line2=
)<switchGhost.txt

if "%line2%" == "assign letter G" goto :doRemove
echo select volume 5 > switchGhost.txt
echo assign letter G>> switchGhost.txt

rem echo ghost will appears
rem pause
goto :doAssign

:doRemove
echo select volume 5 > switchGhost.txt
echo remove letter G>> switchGhost.txt

rem echo ghost will disappears
rem pause

:doAssign
diskpart /s switchGhost.txt