In this post, you’ll learn more about the Error ERROR_VOLMGR_VOLUME_MIRRORED – 0xC0380056 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
ERROR_VOLMGR_VOLUME_MIRRORED – 0xC0380056
Win32 COM Error Error Description
The operation is not supported on mirrored volumes.