Q. How can I check the current usage size for VHDs in a hierarchy of files and the potential maximum size for dynamic VHDs?

A. I wrote the linked script to check a folder and all child folders for all VHDs and then display the current and possible maximum size. It's not the prettiest, but I was in a hurry to get something functional. The next step would be to combine this with a check on the total size of the drive and its free space to see how much you’ve overcommitted the drive with dynamic disks—I'll write that up in a future FAQ.

The script is shown running below.

D:Scripts>cscript getvhdovercommit.vbs d:virtualsMicrosoft (R) Windows Script Host Version 5.8Copyright (C) Microsoft Corporation. All rights reserved.d:virtualssavdalclientsavdalclient.vhd 60.94GB/127.00GBd:virtualssavdalrodc01savdalrodc01.vhd 3.09GB/127.00GBd:virtualstesttest.vhd 6.74GB/127.00GBd:virtualssavdaldc10.vhd 19.18GB/40.00GBd:virtualssavdalscvmm.vhd 19.45GB/127.00GBd:virtualssavdalts01.vhd 18.80GB/60.00GBd:virtualssavdalwss01.vhd 17.63GB/127.00GBTotal Use 145.82GB/735.00GB

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Check out hundreds more useful Q&As like this in John Savill's FAQ for Windows. Also, watch instructional videos made by John at ITTV.net.