How to reclaim space from thin provisioned VM
Download sdelete from sysinternals for windows. Run the following command for your drive letter.
sdelete.exe –z [DRIVE:]
Enable SSH for your VM host and locate the .vmdk file of the host.
To see the actual size run:
du –h [DISKNAME].vmdk
Punch all the zeroed blocks out of the vmdk.
vmkfstools —punchzero [DISKNAME].vmdk
That’s it. You’ll notice the size of VM has decreased.