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16 april 2026

Reclaiming Disk Space for vSphere 6.7 and Later on Non-vSAN Datastores

This topic is relevant if you are using vSphere 6.7 and later, on non-vSAN datastores. In vSphere version 6.7 and later, VMFS-6 supports the Automatic UNMAP feature, which reclaims dead blocks automatically and asynchronously (if it is not deactivated by the vSphere or vCenter Server administrator). Therefore, the periodic space reclaim operations by Horizon 8 do not reclaim significant space.

In Horizon Console, the option Space reclaimed in the latest run over the last 7 days typically shows a value of 0.00 GB, since this is an indication of the specific Horizon 8 periodic space reclamation operations.

Unless you have deactivated automatic UNMAP feature on vSphere or vCenter, no action is needed on Horizon 8 to reclaim space.

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