:: by bitbyte  http://plop.at
@echo off
if "%1"=="" goto help
partlist -d %1|find "extended"  > NUL
if errorlevel 1 goto noextends
echo extends found
goto end
:noextends
echo no extends found
goto end
:help
echo check if extends on the drive
echo.
echo parameter:  0 ...harddisk 1
echo             1 ...harddisk 2
echo.
echo example:  extends 0
:end