@echo off
setlocal enabledelayedexpansion

echo 检查第0块硬盘
call :CheckDisk 0
echo 硬盘总空间（MB）!DiskSize!
echo 已分配空间（MB）!PartitionSize!
echo 未分配空间（MB）!UnallocatedSize!

echo 检查第1块硬盘
call :CheckDisk 1
echo 硬盘总空间（MB）!DiskSize!
echo 已分配空间（MB）!PartitionSize!
echo 未分配空间（MB）!UnallocatedSize!

pause
goto :eof

:CheckDisk
set "DiskSize="
for /f "tokens=2 delims==" %%i in ('wmic DiskDrive where "Index='%1'" get Size /value') do (
    for /f "delims=" %%j in ("%%i") do (
        set "DiskSize=%%j"
    )
)
set "DiskSize=%DiskSize:~0,-6%"
set "PartitionSize="
for /f "tokens=2 delims==" %%i in ('wmic Partition where "DeviceID like 'Disk #%1%%'" get Size /value') do (
    for /f "delims=" %%j in ("%%i") do (
        set "ThisPartition=%%j"
        set /a "PartitionSize+=!ThisPartition:~0,-6!"
    )
)
set /a UnallocatedSize=DiskSize-PartitionSize
goto :eof
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