Hello,   Another requirement for UNMAP with EQL is that the volume can NOT be replicated.  That prevents UNMAP from working.   You should always go by what the OS says vs. the EQL GUI.   Especially when UNMAP is not available.   You can modify the in-use warning threshold to disable the alerts.  ASSUMING you have NOT over provisioned your storage.  If you have, once you actually write out the actual space available the volumes will go offline.  If you have not over provisioned the array you can also change the thin provisioned volumes back to thick if you are not saving very much space.  This can be done live w/o any impact.   Regards, Don
Hi, We use Windows 2012 R2 hyper-v cluster with CSV volume connected from iscsi EqualLogic PS6100 storage array (firmware 8.1.0). The problem is that 15TB volume in SAN reports 5TB (4TB free + 1TB unreserved) free space but in Windows Failover Cluster Manager it reports 7.3TB of free space. I know that Windows 2012 R2 support automatic reclaim of the space on the storage, but why we see such huge difference?  Many thanks
Windows 2012 is not reclaiming space on EqualLogic PS6100