In this post, you’ll learn more about the Error ERROR_VHD_BLOCK_ALLOCATION_FAILURE – 0xC03A0009 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
ERROR_VHD_BLOCK_ALLOCATION_FAILURE – 0xC03A0009
Win32 COM Error Error Description
Failed to write to the virtual hard disk failed because the system failed to allocate a new block in the virtual hard disk.