Explanation/Reference:
Explanation:
Issue
One or more virtual hard disks have a physical sector size that is smaller than the physical sector size of the storage on which the virtual hard disk file is located.
Resolution
Do one of the following:
* Perform a storage migration to move the virtual hard disk to a new physical system
* Use a registry setting to enable a VHD-format virtual hard disk to report a physical sector size of 4k
* Use Windows PowerShell or WMI to enable a VHDX-format virtual hard disk to report a specific sector size The Set-VHD cmdlet sets the ParentPath or PhysicalSectorSizeBytes properties of a virtual hard disk. The two properties must be set in separate operations.
The Set-VHD -PhysicalSectorSizeBytes parameter specifies the physical sector size, in bytes. Valid values are 512 and 4096. This parameter is supported only on a VHDX-format disk that is not attached when the operation is initiated.
References:
https://technet.microsoft.com/en-us/windows-server-docs/compute/hyper-v/best-practices-analyzer/avoid- using-virtual-hard-disks-with-sector-size-less-than-size-of-physical
https://technet.microsoft.com/en-us/library/hh848561.aspx