New data blocks initialize incorrectly when a differencing VHD is expanded in Windows

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 R2 Essentials


This issue occurs if you use the CreateVirtualDisk parameter to create a disk by expanding from a parent virtual hard disk (VHD). When you do this, you set the ParentPath parameter to a non-null value and set the MaximumSize parameter to a value that is larger than the parent disk size. In this situation, the expanded VHD is corrupted in Windows 8.1, Windows Server 2012 R2, Windows 8, or Windows Server 2012.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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