@echo off
color f4
echo 特别提醒! 请不要修改C: !&PAUSE>NUL
COLOR 07
cls
set/p a=请输入原盘符……
set/p b=请输入新盘符……
set old=%a%:
set new=%b%:
pushd %new% 2>nul &&echo %new%盘已经存在! &&pause &&goto :eof
for /f %%i in ('mountvol %old% /l') do set "vol=%%i"
mountvol %old% /d
mountvol %new% %vol%
popd