I'm trying to virtualize a physical server, which contains two volumes (C: and D:). The operating system resides on volume c:, and I don't want to copy over volume d:. This shows up correctly in the converter, with c: as system and d: as active. However, I can't seem to uncheck the d: drive. Is there anyway to do this without taking the d: drive offline? Why won't it let me uncheck this volume?