In this post, you’ll learn more about the Error ERROR_VOLMGR_EXTENT_NOT_CONTIGUOUS – 0xC038001B that is returned when working with the COM-based APIs in Win32
Win32 COM Error
ERROR_VOLMGR_EXTENT_NOT_CONTIGUOUS – 0xC038001B
Win32 COM Error Error Description
The specified volume is retained and can only be extended into a contiguous extent. The specified extent to grow the volume is not contiguous with the specified volume.