A bad RAM caused my Win 7 machine to die - killing the boot drive. I successfully reinstalled Win 7 Ultimate on a fresh hard drive. When I connect my other data hard drives to the machine, some are seen and some are not. In Computer Management, the visible drives are "Basic" and the invisible ones are "Dynamic". If I convert the dynamic disk to basic, will I lose my data? If so, how do I access my data now? Also, why can't Windows 7 read a dynamic disk that it created in another life? Thanks for any help.