I am wanting to upgrade to OMV 4 from 2.2.14 and would like to know if I could have any known or unknown issues? OMV system has a raid5 16tb array with about 7tb free. Is it a good idea to disconnect the raid5 array while upgrading to OMV 4? Will settings transfer over to the new ver or will I need to re configure? I am NOT a Linux expert so any help or is there another existing thread I could look at? Thanks in advance.