Change VMDK geometry

Set-VMDK-Geometry.ps1

$Path = "C:\Users\Michaelryom\Downloads\VMware\vRealize-Operations-Manager-Appliance-6.1.0.3038036_OVF10\"
$vdisk = 'C:\Program Files (x86)\VMware\VMware Workstation\vmware-vdiskmanager.exe'

$VMDKs = dir $Path*.vmdk
cd $path

Foreach($VMDK in $VMDKs){
$OldVMDK = $VMDK.Name
$NewVMDK = $VMDK.Name -replace(".vmdk","-NEW.vmdk")
$TempVMDK = $VMDK.Name -replace(".vmdk","-TEMP.vmdk")

$VMDKContent = gc $VMDK -First 25

$TotalSectors = [INT]($VMDKContent | where {$_ -match "RW"}).Split(" ")[1]
$cylinders = ($VMDKContent | where {$_ -match "cylinders"}).Split(" ")[2].Replace('"','')
$heads = ($VMDKContent | where {$_ -match "heads"}).Split(" ")[2].Replace('"','')
$sectors = ($VMDKContent | where {$_ -match "sectors"}).Split(" ")[2].Replace('"','')

if($Sectors -ne "63"){
$Newheads = 255
$Newsectors = 63
$Newcylinders = [Math]::floor(($TotalSectors*512)/($Newheads*$Newsectors*512))

.$vdisk -r $OldVMDK -t 1 $TempVMDK

try
{
   $reader = New-Object -typename System.IO.StreamReader -argumentlist $path\$TempVMDK
   $data = $reader.ReadToEnd()
   $reader.close()
}
finally
{
   if ($reader -ne $null)
   {
       $reader.dispose()
   }
}

$data = $data -replace ('ddb.geometry.heads = "'+$heads+'"'),('ddb.geometry.heads = "'+$newheads+'"') -replace ('ddb.geometry.sectors = "'+$sectors+'"'),('ddb.geometry.sectors = "'+$Newsectors+'"') -replace ('ddb.geometry.cylinders = "'+$cylinders+'"'),('ddb.geometry.cylinders = "'+$Newcylinders+'"')


try
{
   $writer = New-Object -typename System.IO.StreamWriter -argumentlist $path\$TempVMDK
   $writer.write($data)
   $writer.close()
}
finally
{
   if ($writer -ne $null)
   {
       $writer.dispose()
   }
}

.$vdisk -r $TempVMDK -t 5 $NewVMDK

}
dir $TempVMDK.Replace(".vmdk","*.vmdk") | Remove-Item
}