Windows Server 2012 Where Did My Disk Space Go?

I am going to provide a few pointers on Windows Server 2012 and loss of disk space.  There is not a lot of info out there so I will try and pool it into one place.  I myself lost a large chunk of space. 

Running:

"Optimize-Volume d -ReTrim -SlabConsolidate -Verbose"

command from power shell did not help although this is a good start to reclaim space.

The problem started when I created a backup image on my Storage Space drive then manually deleted it.  The space was not released even though the file was gone.  I decided to check out Diskshadow.

To do this run Command Prompt Elevated or As Administrator.
 
At the command prompt type "Diskshadow" without the quotes.

Then type "List Shadows all" and you should see:

Next look for your drive spaces volume in the list.  If its not in the list there are no shadow copies and
this is not the problem.  For example here you can see E: drive listed above has 1 Shadow Copy. 
To delete all Shadow Copies on this volume type  "Delete Shadows Volume E:" . 
(NB: This is an old Shadow Copy from Windows Home Server 2011 but the process is no different.)

If successful you should see:

























Once this is done you will need to run "Optimize-Volume e -ReTrim -SlabConsolidate -Verbose". The volume letter in this case is "e" but you can change that to match the drive of your Spaces disk.

Below is the result of running the Power Shell Command:






















 
 
 
 
 
 
 


















I hope this helps out and as usual be careful with your data.  Make backups and use this tutorial at your own risk.

Feel free to comment.