Shrink a VMware VMDK from command line

# This will run a VMWare defrag, prepare, shrink, and MS Contig defrag on a given list of VMDK files

# requires:

# Run as administrator
# vmware-mount.exe, found at vmware: https://my.vmware.com/web/vmware/details?downloadGroup=VSP510-VDDK-510&productId=268
# contig.exe, found at Microsoft: http://technet.microsoft.com/en-au/sysinternals/bb897428

# Location of vmware-vdiskmanager.exe
$vdiskmanager='C:\Program Files (x86)\VMware\VMware Workstation\vmware-vdiskmanager.exe'

# Location of vmware-mount.exe
$vmount='C:\Program Files (x86)\VMware\VMware Virtual Disk Development Kit\bin\vmware-mount.exe'

# Location of contig.exe
# Run it once first by double clicking it to agree with the EULA
$contig='c:\program files (x86)\sysinternals\contig.exe'

# Text file containing the full path of the VMDK files to shrink, one per line
$sourcefile="d:\vmdkmaintenance\vmdklist.txt"

# Test file containing the file size before and after shrinking
$resultsfile="d:\vmdkmaintenance\maint.txt"

# Drive letter to mount the VMDK as
$mount_DriveLetter="m:"




# ---------------------------------------------------------------------------#


$vdisk_Defrag="-d"
$vdisk_Prepare="-p"
$vdisk_shrink="-k"
$vmount_Volume="/v:"
$vmount_Partitions="/p"
$vmount_Dismount="/d"
$contig_verbose="-v"


# get the list of VMDK files and list the size
get-content $sourcefile | foreach-object {get-childitem $_} | select fullname,length >> $resultsfile



get-content $sourcefile | ForEach-Object {
    $activeMachine=$_;

    # Use the VMWare Disk Manager defrag on the active VMDK
    write-host "Defrag $activeMachine"
    & $vdiskmanager $vdisk_defrag $activeMachine

    # VMDK files may have multiple partitions, get the number of partitions for the active VMDK
    write-host "List Partitions $activeMachine"
    & $vmount $vmount_partitions "$activeMachine" > "$ENV:temp\VMDKPartition.txt"
    $TotalPartitions=get-content "$ENV:temp\VMDKPartition.txt" | measure-object -line

    # For each partition in the active VMDK, mount the partition to the drive letter,
    # prepare for shrinking and dismount
    for($activepartition=1; $activepartition -le $Totalpartitions.Lines; $activepartition++){
       write-host "Preparing $activeMachine partition $activepartition"
       & $vmount $mount_DriveLetter $activeMachine $vmount_Volume$activepartition
       & $vdiskmanager $vdisk_prepare $mount_DriveLetter
       & $vmount $mount_DriveLetter $vmount_Dismount
    }

    # Shrink the active VMDK
    write-host "Shrink $activeMachine"
    & $vdiskmanager $vdisk_shrink $activeMachine

    # perform contig on the active VMDK
    & $contig $contig_verbose $activeMachine
}

# get the list of VMDK files and list the size
get-content $sourcefile | foreach-object {get-childitem $_} | select fullname,length >> $resultsfile