Windows 2012 is not reclaiming space on EqualLogic PS6100

Question

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

Origin3k · Answer

Take a look to http://en.community.dell.com/support-forums/storage/f/3775/t/19991233

and check the Requiremnents like:
- Maybe the EQL Volume need a thinprovisioning one
- FW Version
- VHDX vDisks

Regards,
Joerg

natip · Answer

I see we have some VHD files in volume. I guess this is why its not UNMAPing. Could we ignore in-use space reporting in SAN and upload 5.5TB VM just based what windows failover cluster is reporting (7TB free)?

thanks

EqualLogic

Windows 2012 is not reclaiming space on EqualLogic PS6100

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