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Defrag for Windows 2012 R2 Hyper-V CSV volume

Question asked by dbaddorf on Jan 13, 2016
Latest reply on Jan 27, 2016 by Nick Dyer

   My Nimble customers have Cluster Shared Volumes (CSV) and run Windows 2012 R2 Hyper-V VM's on those CSV's.  My question is should I run Windows Defrag on the VM's?  And should I run Windows Defrag on the CSV volumes?  Running a defrag analyze on a CSV volume can be done (see but I am not seeing the output that I've been accustomed to - I don't see a message about "you should/shouldn't defragment this volume" but rather just see messages about Slab Consolidation.  Apparently Windows defrag works differently when the volume is thinly provisioned.  But I can't seem to find very clear information on the best practices of defragrmenting a CSV volume which is thin provisioned.  Which leads me to my above questions:  Should I run defrag at the VM level?  And should I run it on the CSV volume?

  I appreciate any insight that anyone has to offer...

Thanks!  Dave