O&O Defrag 17 User's Guide - O&O Software

Technical informationFile SystemExplanationadvantages compared to the older FAT. FAT32 drives are Windowssupportedby default and can be defragmented without any problemusing O&O Defrag.NTFSThe NT file system was developed completely new for the WindowsNT family. It offers the option of security restrictions on the file level,increases the security against data errors, and achieves higher performance.It is supported by Windows. And O&O Defrag gets optimal resultswhen defragmenting NTFS drives.EFSA file system introduced with Windows 2000 which is based on NTFSand its encryption ensures higher data security against abuse orunauthorized access. The Encrypted File System (EFS) makes datafor unauthorized users unreadable. O&O Defrag supports EFS harddisks; neither data integrity nor data security is compromized.Free space needed for defragmentationThe following limitations are valid for O&O Defrag. These are caused by Windows and cannot be circumvented.Size of DriveAll drive sizes supported by Windows are supported by O&O Defrag.O&O Defrag was optimized for use on file systems having an especially large number of files. The storage capacity ofa drive is therefore irrelevant.FoldersAny number of folders can be defragmented. O&O Defrag has an optimized memory management which allows it torecord all file and folder information.Free hard disk spaceDrives without any free disk space cannot be defragmented. For the best possible results, at least 5% of the wholehard disk capacity should be free. Files larger than the maximum free and connected storage space, may not be possibleto defragment, and if so only with several runs.To accelerate defragmentation, we recommend reserving at least 10-15% free hard disk space, however, this percentagedecreases the higher the hard disk size is. What really matters is the size of the largest file that needs to bedefragmented or moved around. For an optimal defragmentation, the file should have enough connected storage spaceavailable.O&O Defrag - 70