Moving 100+ VMs between Intel and AMD Clusters

And here I thought this was an easy one.

Objective:

1. 1) Move 100+ VMs from one Cluster to another
   
   
2. 2) Change network the guest is using
   
   
3. 3) Move needs to be fast
   
   

Prerequisites:

1. 1) Ensure LUNs from old Cluster are visible from new Cluster
   
   
2. 2) Ensure proper VLANs are available
   
   
3. 3) Ensure Tools are running
   
   

Since vMotion is not an option, a shutdown and startup is required.  I put together the following simple script to shutdown guest; wait until machine is not running and do a Move-VM and Start-VM.

Script:

$vms = Import-CSVC:\Scripts\PowerCLI\CSmoveInput.csv

foreach ($vm in $vms){

      $VMdestination = Get-VMHost $vm.tVMhost

      $Network = $vm.tVLAN

      Get-VM-Name $vm.name | Get-NetworkAdapter | Set-NetworkAdapter-StartConnected:$true -Confirm:$false -NetworkName $Network

      Shutdown-VMGuest-VM $vm.name -Confirm:$false

      while (Get-VMGuest $vm.name | where{$_.State -eq "Running"})

            {

            echo "Machine is Still Running"

            Sleep-Seconds 3

            }

      Write-Host $vm.name is off

      Move-VM-vm $vm.name -Destination$VMdestination

      Start-VM-vm $vm.name

}

Most of the time it works fine but too often I get "The operation is not allowed in the current state."

Is there a better way to ensure the VM is OFF?

Any help is greatly appreciated!

Robert