Expanding an Eager Zero Thick VMDK

Expanding an Eager Zero Thick VMDK via the vsphere client will result in the disk being labelled Lazy Zero Thick. I was not expecting this behaviour but it is described in an article by Cormac Hogan (https://blogs.vmware.com/vsphere/2012/06/extending-an-eagerzeroedthick-disk.html). A user in the comments section of that article suggests the issue has been fixed in vSphere 6 but I have not been able to test it for myself.

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