Hello,
I'm having trouble seeing anyone posting with this specific issue. We currently have a Microsoft 2012 Cluster in a box scenario. One of the drives need extended, but it fails with the following error: The disk extend operation failed: the virtual disk requires a feature not supported by this program. Hot-extend is currently supported only for VMFS flat virtual disks without snapshots opened in persistent mode.
The VMDKs are thick eager zeroed utilizing LSI Logic SAS with SCSI bus sharing set to Virtual, and are way under the 2TB size. There are no snapshots of the VMs in question.