Hi
I have an 8 blade Windows Hyper-V 3 cluster. Each of these blades has access to a 5.00Tb LUN (Cluster Shared Volume), created through Snapdrive, stored in a 5Tb volume, where each of my 80-odd virtual machines' vhdxs are stored:
Vol

Lun

Storage efficiency is enabled, and after the last run, these are the results:

However, Windows still reports only 439Gb of free space:

I don't have any snapshots or QoS setup on this volume.
Now:
- The vol reports that it has 2.42Tb free space (due to dedupe I assume)
- The lun reports that it has 1.11Tb of free space
- Windows only reports that there is 418Gb of free space...
Where did the other 718Gb go that's supposed to be left in the LUN?
How much can I safely decrease the size of the volume now that it is deduped?