Quigongentoo

Thank you for your response. I kind of figured it would be this easy, however, I wanted to be sure to do it correctly.

My file/plex/torrent server runs Windows 8.1 Pro and I want to put Server 2012 r2 on it. Im using Drivepool and Stablebit now with an 8 drive setup pooled into 18TB. I have a very extensive collection of media on this machine in the pool. My question is: Is there a specific way I should go about installing the new OS, as I do not want to loose any of my data? I would suppose there is something I should do with Drivepool before formatting the OS drive, or can I just unplug the drives and install the new OS? I just want to be sure I do this correctly the first time. Any help or suggestions would be appreciated. Thanks