xp下确定最后的盘符

 @echo off
for %%i in (Z Y X W V U T S R Q P O N M L K J I H G F E D C) do (
    if exist %%i:/nul (
        for /f "tokens=3" %%j in ('dir /-c %%i:/') do set freesize=%%j
        set last=%%i
        if not "!freesize!"=="0" goto last_drive
    )
)
goto :eof

:last_drive
echo 最后一个分区是 %last%
md %last%:/001
pause