Backup via Internet auf 1TB TrueCrypt-Ordner schlägt fehl

# Config
$global:config = @{}
$config.networkpath = "\\192.168.0.1\Freigabe"
$config.networkuser = "NAS-USER"
$Config.networkpassword = Get-Content ("C:\Passwort_Netzlaufwerk.txt") | ConvertTo-SecureString
$config.truecryptfile = "TRUECRYPTFILE.tc"
$config.truecryptpassword = Get-Content ("C:\Passwort_TrueCrypt.txt") | ConvertTo-SecureString

$global:job = @{}
$job.quelle = @("C:\Test","C:\Test2")
$job.parameter = "/mir /w:0 /r:0 /np /tee"





clear-host
# ==============================================================================================================================================================
# Deklarationen
$config.network_cred = New-Object System.Management.Automation.PSCredential($config.networkuser, $Config.networkpassword)
$config.truecrypt_cred = New-Object System.Management.Automation.PSCredential("Dummy", $Config.truecryptpassword)

# Funktionen
Function Get-NextFreeDriveletter {
    $AtoZ = "HIJKLMNOPQRSTUVWXYZ"
    $DriveLetters = Get-PSDrive -PSProvider 'FileSystem' | ForEach-Object {
        $_.Name
    }
    for($i=0; $i -le $AtoZ.length -1; $i++) {
        If ($DriveLetters -notcontains $AtoZ[$i]) {
            Return $AtoZ[$i]+":"
        }
    }
}
function Connect-Share {
    param(
        [String]$DriveName,
        [String]$ShareName,
        [Object]$Credential,
        [String]$DisplayName
    )
    $RegEntry = $ShareName.replace("\","#")
    $RegPath = $("Registry::HKCU\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\MOUNTPOINTS2\$RegEntry")
    $MyDrive = $DriveName + "\"

    # Netzlaufwerk frei machen
    if((test-path $DriveName) -eq $true) {
        Start-Process -FilePath cmd -ArgumentList "/c net use /d $DriveName /yes >nul" -wait -NoNewWindow | Out-Null
        sleep -m 500
        $tmp = test-path $DriveName
        if($tmp -ne $true) { 
            write-host -ForegroundColor green "... Laufwerk erfolgreich frei gemacht: $DriveName"
        } else { 
            write-host -ForegroundColor red   "... Laufwerk konnte nicht frei gemacht werden: $DriveName"
            return
        }
    }
    
    # Registry Displayname löschen
    if((test-path $RegPath) -eq $true) {
        remove-item -Path $RegPath -Recurse
    }

    # Credentials zerlegen
    $Cred = [System.Management.Automation.PSCredential]$Credential
    $Password = $Cred.GetNetworkCredential().Password
    $UserName = $Cred.UserName
    
    # Share Verbinden    
    $P = Start-Process -Filepath cmd -ArgumentList "/c net use $DriveName $ShareName $Password /user:$UserName /p:no >nul" -Wait -PassThru -NoNewWindow
    sleep -m 500
    if ($P.ExitCode -eq 0) { 
        write-host -ForegroundColor green "... Laufwerk erfolgreich angebunden: $Displayname ($DriveName)"
        # Registry Displyname schreiben
        New-Item -Path $RegPath -Force | Out-Null
        New-ItemProperty -Path $RegPath -Name "_LabelFromReg" -PropertyType String -Value $Displayname -Force | Out-Null
    } else { 
        write-host -ForegroundColor red   "... Laufwerk konnte nicht angebunden werden: $Displayname ($DriveName)"
    }
}
function Disconnect-Share {
    param(
        [String]$DriveName,
        [String]$ShareName
    )
    $RegEntry = $ShareName.replace("\","#")
    $RegPath = $("Registry::HKCU\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\MOUNTPOINTS2\$RegEntry")
    $MyDrive = $DriveName + "\"

    # Netzlaufwerk frei machen
    if(test-path $MyDrive) {
        Start-Process -FilePath cmd -ArgumentList "/c net use /d $DriveName /yes >nul" -wait -NoNewWindow
        sleep -m 500
        $tmp = test-path $DriveName
        if($tmp -ne $true) { 
            write-host -ForegroundColor green "... Laufwerk erfolgreich getrennt. ($DriveName)"
        } else { 
            write-host -ForegroundColor red   "... Laufwerk konnte nicht getrennt werden. ($DriveName)"
        }
    }
    
    # Registry Displayname löschen
    if((test-path $RegPath) -eq $true) {
        remove-item -Path $RegPath -Recurse
    }
}
# ==============================================================================================================================================================
# Programmablauf
    $starttime = date

# Netzlaufwerk verbinden
    $MyNetworkDrive = Get-NextFreeDriveletter
    write-host "Netzlaufwerk:"
    Connect-Share -DriveName $MyNetworkDrive -ShareName $config.networkpath -DisplayName "EXT_BACKUP" -Credential $config.network_cred


# TrueCrypt ankoppeln
    $MyTrueCryptDrive = Get-NextFreeDriveletter
    write-host "TrueCrypt:"

    $TrueCryptFile = $MyNetworkDrive + "\" + $config.truecryptfile
    Start-Process -FilePath cmd -ArgumentList "/c ""C:\Program Files\TrueCrypt\TrueCrypt.exe"" $TrueCryptFile /l $MyTrueCryptDrive /p $($config.truecrypt_cred.GetNetworkCredential().password) /a /q" -wait -NoNewWindow   
    $tmp = Test-Path $MyTrueCryptDrive
    if($tmp -eq $true) {
        write-host -ForegroundColor green "... Container erfolgreich gemountet. ($MyTrueCryptDrive)"

# Backup
        write-host -ForegroundColor yellow "Do Backup-Job ..."
        $job.quelle | foreach {
            $quelle = $_
            $ziel = "$MyTrueCryptDrive$($_.remove(0,2).trim())"
            write-host -ForegroundColor yellow "Quelle: $quelle"
            write-host -ForegroundColor yellow "Ziel: $ziel"
            Start-Process -FilePath cmd -ArgumentList "/c robocopy.exe ""$quelle"" ""$ziel"" $($job.parameter)" -wait -NoNewWindow 
            write-host ""
            write-host ""
        }
      

# TrueCrypt abkoppeln
        write-host "TrueCrypt:"
        Start-Process -FilePath cmd -ArgumentList "/c ""C:\Program Files\TrueCrypt\TrueCrypt.exe"" /d $MyTrueCryptDrive /f /q" -wait -NoNewWindow
        $tmp = Test-Path $MyTrueCryptDrive
        if($tmp -eq $false) {
            write-host -ForegroundColor green "... Container erfolgreich dismountet. ($MyTrueCryptDrive)"
        } else {
            write-host -ForegroundColor red "... Container konnte nicht dismountet werden. ($TrueCryptFile)"
        } 
 
 
    } else {
        write-host -ForegroundColor red "... Container konnte nicht gemountet werden. ($TrueCryptFile)"
    }


# Netzlaufwerk trennen
write-host "Netzlaufwerk:"
Disconnect-Share -DriveName $MyNetworkDrive -ShareName $config.networkpath


# Ausgabe
$endtime = date
$time = $endtime - $starttime
write-host ""
write-host ""
write-host -ForegroundColor Cyan "Laufzeit ($endtime): $($time.Hours)h:$($time.Minutes)m:$($time.Seconds)s:$($time.Milliseconds)ms"
Start-Sleep -s 30