Tried to increase a disk past 2TB today on a VM on a ESXi 6.0.0 (via vSphere) host but kept getting this:
Hot-extend was invoked with size (6442450944 sectors) >= 2TB. Hot-extend beyond or equal to 2TB is not supported. The disk extend operation failed: msg.disklib.INVAL
Well it was driving me nuts until I turned the VM off and tried again…..it worked.