Which could be causing this?

An administrator attempts to manually reclaim space on thin-provisioned VMFS6 volumes but finds that no additional space is being recovered.

Which could be causing this?
A . vSphere 6.5 does not support manual UNMA
C . The manual UNMAP operation has been moved to the vSphere web client.
D . The VASA version is use is incompatible.
E . UNMAP is automated for VMFS6.

View Answer

Answer: D

Explanation:

VMFS 6 is the new filesystem of vSphere 6.5. The new filesystem supports 512e advanced format drives and is 4098 sector (4K) aligned. It also supports automatic UNMAP, which asynchronously tracks freed blocks and sends UNMAPs to backend storage in background.

Reference:

https://kb.vmware.com/selfservice/microsites/search.do? language=en_US&cmd=displayKC&externalId=2147824