@echo off

setlocal enabledelayedexpansion
for /F "tokens=5,6 delims=\ " %%a in ('reagentc.exe /info^|findstr GLOBALROOT') do (
  set "HARDDISK=%%a"
  set HARDDISKID=!HARDDISK:~-1!
  set "PARTITION=%%b"
  set PARTITIONID=!PARTITION:~-1!
)

for /f "tokens=2,3,4,5" %%B in ('^(echo sel disk %HARDDISKID%^&echo list part^)^|diskpart^|findstr /C:"Partition %PARTITIONID%"') do set /A MYEXIT=%%D

echo %MYEXIT%
exit %MYEXIT%