Windows Server 2012 Hyper-V 4k logical sector size on VHDX not able to add to VM

Windows 2012 Standard running Hyper-V (working with a few clusters, 4 node and a 6 node failover clusters)

Equallogic arrays running 7.0.5.

I provisioned a 4k sector size volume and added it as a CSV on the Hyper-V failover cluster.
Running fsutil shows that the attached CSV has both the physical and logical sector size showing as 4096.
I then create a new VHDX from PowerShell to specify the logical sector size.
When I try to attach the VHDX to the SCSI controller on a VM running Windows 2012, I get an "Incorrect Function" error if the VM is running. If the VM is off, I can attach it but the VM will not boot while the VHDX is attached.

I've tried a few different options for creating the VHDX (all result in the same errors):

New-VHD C:\ClusterStorage\CSVTest4K\Test1.vhdx –LogicalSectorSize 4096 –SizeBytes 10GB -Fixed
New-VHD C:\ClusterStorage\CSVTest4K\Test2.vhdx –LogicalSectorSize 4096 –SizeBytes 10GB -Dynamic
New-VHD C:\ClusterStorage\CSVTest4K\Test3.vhdx –LogicalSectorSize 4096 -PhysicalSectorSize 4096 –SizeBytes 10GB -Fixed
New-VHD C:\ClusterStorage\CSVTest4K\Test4.vhdx –LogicalSectorSize 4096 -PhysicalSectorSize 4096 –SizeBytes 10GB -Dynamic
New-VHD C:\ClusterStorage\CSVTest4K\Test5.vhdx –BlockSizeBytes 128MB –LogicalSectorSize 4KB –SizeBytes 1TB -Dynamic

Select allOpen in new window

Here's the error message when trying to attach the VHDX to the running VM:

[Window Title]
Settings

[Main Instruction]
Error applying Hard Drive changes

[Content]
Failed to add device 'Virtual Hard Disk'.

Attachment 'C:\ClusterStorage\CSVTest4K\test1.vhdx' failed to open because of error: 'Incorrect function.'.

[Expanded Information]
'VMNAME' failed to add device 'Virtual Hard Disk'. (Virtual machine ID 30FBFCE4-43D1-4B66-9A58-527884D9BE13)

'VMNAME': Attachment 'C:\ClusterStorage\CSVTest4K\test1.vhdx' failed to open because of error: 'Incorrect function.' (0x80070001). (Virtual machine ID 30FBFCE4-43D1-4B66-9A58-527884D9BE13)

From everything I'm reading this should be supported. What am I missing?

Thanks,
MU