Prototype wrapper for DD

PrototypeDDWrapper.ps1

$ChocoInventory = choco list -lo

if ("$ChocoInventory" -notmatch 'qemu-img') {
    choco install qemu-img -y
}
if ("$ChocoInventory" -notmatch '\ git\ ') {
    choco install git -y
}

$env:path += ';c:\program files\git\usr\bin'

class ValidatePathExistsAttribute : System.Management.Automation.ValidateArgumentsAttribute
{
    [void]  Validate([object]$arguments, [System.Management.Automation.EngineIntrinsics]$engineIntrinsics)
    {
        $path = $arguments
        if([string]::IsNullOrWhiteSpace($path))
        {
            Throw [System.ArgumentNullException]::new()
        }
        if(-not (Test-Path -Path $path))
        {
            Throw [System.IO.FileNotFoundException]::new()
        }        
    }
}



function Convert-RawImageToVHDX {
    Param(
        [Parameter(Mandatory)]
        [ValidatePathExists()]
        [System.IO.FileInfo]$Path,
        [Parameter()]
        [System.IO.FileInfo]$OutputPath
    )
    if (-not $OutputPath) {
        $OutputPath = -join((($path.Directory,$path.basename) -join [IO.Path]::DirectorySeparatorChar),'.vhdx')
    }

    qemu-img.exe convert "$Path" -O vhdx -o subformat=dynamic "$OutputPath"
}

function Backup-PhysicalDrive {
    Param(
        [Parameter(Mandatory)]
        [ValidateSet('ToImage','ToDrive')]
        [string]$Mode
    )
    #$env:Path += ';C:\Program Files\Git\usr\bin'
    
    $DiskDrives = Gwmi Win32_diskdrive | select PSComputerName,index,Caption,DeviceID,pnpdeviceID,BytesPerSector,InterfaceType,Size,TotalSectors,SerialNumber

    $SourceDrives = $DiskDrives | Out-GridView -OutputMode Multiple -Title 'Select a Source Drive'

    $ChangeSet = $(
        if ($mode -eq 'ToImage') {
            $SourceDrives | Select *,@{N='OutputName';e={Read-Host -Prompt "Output Filename/Path for $($_.Caption) at index $($_.index) (should end in .img)"}}
        } elseif ($Mode -eq 'ToDrive'){
            $SourceDrives | Select *,@{N='OutputName';e={
                $ThisSource = $_.DeviceID
                $DiskDrives | Out-GridView -OutputMode Single -Title "Select a target drive to which $ThisSource will be cloned" | select -expandproperty DeviceID
            }}
            $SourceDrives | ?{$_.DeviceID -eq $_.OutputName}
        }
    )
    
    
    $ChangeSet | %{
        [scriptblock]::Create(('dd if={0} of={1} bs={2}' -f $_.DeviceID,$_.OutputName,'512k' <#$_.BytesPerSector#>)).Invoke()
    }
}

Note:

Writing to disk as in the 'ToDrive' scenario is not currently working. Am trying to figure out why.

Error thrown is that the target is a directory not a file.