@echo off

echo>list.txt

echo>list.txt list volume

diskpart -s list.txt

echo>move.txt

echo>move.txt list volume

echo>>move.txt select volume 4

echo>>move.txt remove letter=D

diskpart -s move.txt

Del /f "list.txt"

Del /f "move.txt"

=========================

@echo off

echo>list.txt

echo>list.txt list volume

diskpart -s list.txt

echo>move.txt

echo>move.txt list volume

echo>>move.txt select volume 4

echo>>move.txt assign letter=D

diskpart -s move.txt

Del /f "list.txt"

Del /f "move.txt"