the first encrypted partition have never been opened perhaps for months?
My justification for this scenario is that Drive D is an encrypted backup of my Drive C. It is encrypted to minimize the risk of it being corrupted should my computer catch a virus. When dismounted (closed), my encrypted drive will be shown by Windows to be unformatted. As such, Windows will not normally write to it. Thus it offers a layer of security that should I lose all of my Drive C, I can recover by booting into my encrypted Drive D. I am not going to argue the fine print here. This is my justification for having encrypted my Drive D.