General Floppy script [Hyper-V]

General Floppy script [Hyper-V]

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Having written an “all-in-one” script for DVD media management with a Hyper-V virtual machine I figured I would take a look at what would be involved in doing the same sort of thing for floppy disks.  For the most part this was as simple as doing a search and replace on the key methods and properties.

Now I have a floppy disk script that will let you:

  • View the current floppy disk configuration
  • Connect a new virtual floppy disk
  • Eject the current virtual floppy disk

(note that Hyper-V does not support the use of physical floppy disks)

Here is a screen shot of it running on my computer:


And here is the code for the script.

Once again – this is a pretty huge script but I have attached a copy of the original to the end of this post.

# Function for handling WMI jobs / return values
Function ProcessResult($result, $successString, $failureString)
   #Return success if the return value is "0"
   if ($result.ReturnValue -eq 0)
      {write-host $successString} 
   #If the return value is not "0" or "4096" then the operation failed
   ElseIf ($result.ReturnValue -ne 4096)
      {write-host $failureString "  Error value:" $result.ReturnValue}
      {#Get the job object
      #Provide updates if the jobstate is "3" (starting) or "4" (running)
      while ($job.JobState -eq 3 -or $job.JobState -eq 4)
         {write-host $job.PercentComplete "% complete"
          start-sleep 1
          #Refresh the job object
       #A jobstate of "7" means success
       if ($job.JobState -eq 7)
          {write-host $successString}
          {write-host $failureString
          write-host "ErrorCode:" $job.ErrorCode
          write-host "ErrorDescription" $job.ErrorDescription}
# Function for ejecting the floppy
Function EjectFloppy()
   # If there is media in the drive - eject it
   if ($existingRASD) {
      $result = $VMMS.RemoveVirtualSystemResources($VM, @($existingRASD))
      ProcessResult $result "The floppy disk has been ejected." "Failed to clear the floppy drive."}
# Prompt for the Hyper-V Server to use
$HyperVServer = Read-Host "Specify the Hyper-V Server to use (enter '.' for the local computer)"
# Prompt for the virtual machine to use
$VMName = Read-Host "Specify the name of the virtual machine"
# Get the management service
$VMMS = gwmi -namespace root\virtualization Msvm_VirtualSystemManagementService -computername $HyperVServer
# Get the virtual machine object
$VM = gwmi MSVM_ComputerSystem -filter "ElementName='$VMName'" -namespace "root\virtualization" -computername $HyperVServer
# SettingType = 3 ensures that we do not get snapshots
$SystemSettingData = $VM.getRelated("Msvm_VirtualSystemSettingData") | where {$_.SettingType -eq 3}
# Get the floppy drive
$FloppyDrive = $SystemSettingData.getRelated("Msvm_ResourceAllocationSettingData") | where{$_.ResourceType -eq 14}
# Setup parameters for main menu prompt
$message = "What do you want to do with the floppy drive?"
$info = New-Object System.Management.Automation.Host.ChoiceDescription "&Display Information", "Display information about the current contents of the floppy drive."
$eject = New-Object System.Management.Automation.Host.ChoiceDescription "&Eject", "Eject the current contents of the floppy drive."
$vfd = New-Object System.Management.Automation.Host.ChoiceDescription "Connect &VFD", "Connect a VFD file to the floppy drive."
$quit = New-Object System.Management.Automation.Host.ChoiceDescription "&Quit", "Exit the Floppy Tools script."
$options = [System.Management.Automation.Host.ChoiceDescription[]]($info, $eject, $vfd, $quit)
   # Check to see if there is already media in the floppy drive
   $existingRASD = $SystemSettingData.getRelated("Msvm_ResourceAllocationSettingData") | where {$_.Parent -eq $FloppyDrive.__Path}
   # Ask the user what they want to do with the floppy drive
   $promptResult = $host.ui.PromptForChoice($null, $message, $options, 0) 
   switch ($promptResult)
         0  {# Display information
             # If there is media in the drive - display key information
             if ($existingRASD) {
                write-host "Media type: " $existingRASD.ElementName
                write-host "Media     : " $existingRASD.Connection
             else {
                write-host "No floppy disk is configured."
         1 {# Eject the floppy
         2 {# Connect a VFD file
            # Prompt for the VFD file to connect
            $vfdPath = Read-Host "Specify the VFD file to connect to the virtual machine"
            # Create a new object for a floppy media, connected to the floppy drive
            $FloppyAllocationCapabilities = (gwmi -computername $HyperVServer -namespace root\virtualization Msvm_AllocationCapabilities `
                                             -filter "ResourceType=21 and ResourceSubType='Microsoft Virtual Floppy Disk'").__Path.Replace('\', '\\')
            $FloppySettingsData = [wmi](gwmi -computername $HyperVServer -namespace root\virtualization Msvm_SettingsDefineCapabilities `
                                        -filter "GroupComponent='$FloppyAllocationCapabilities' and ValueRange=0").PartComponent
            $FloppySettingsData.Connection = $vfdPath
            $FloppySettingsData.Parent = $FloppyDrive.__Path
            # Add the media to the virtual machine
            $result = $VMMS.AddVirtualSystemResources($VM, $FloppySettingsData.GetText(1))
            ProcessResult $result "The VFD file has been connected." "Failed to connect the VFD file."
until ($promptResult -eq 3)


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  • Hye .. i really liek your scriopt ..

    can you give  me a c# wmi related code of the above.. like this ..

    ManagementScope scope = new ManagementScope(@"\\" + server + @"\ROOT\virtualization", GetConnectionOptions());

                   ManagementObject virtualSystemService = Utility.GetServiceObject(scope, "Msvm_VirtualSystemManagementService");

                   ManagementObject vm = Utility.GetTargetComputer(vmName, scope);

                   ManagementBaseObject inParams = virtualSystemService.GetMethodParameters("CreateVirtualSystemSnapshot");

                   inParams["SourceSystem"] = vm.Path.Path;

                   ManagementBaseObject outParams = virtualSystemService.InvokeMethod("CreateVirtualSystemSnapshot", inParams, null);

                   if ((UInt32)outParams["ReturnValue"] == ReturnCode.Started)

    currently im using you powershell code directly using runspaces, but it would be more helpful for me if i use management classes..

    can you help me???

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