Short description of O&O Defrag 11 Server Edition 11.5: O& O Defrag 11 optimizes hard disks and merges data fragments twice as quickly as the previous version. Thanks to its new background monitoring, O& O Defrag 11 is now able to prevent fragmentation from occurring at its earliest stages. Newly added and modified files are analyzed and defragmented whenever they?re not being used. This allows O& O Defrag to ensure, behind the scenes, that your hard disks are constantly performing at their best.