Technical information

O&O Defrag - 69

File System Explanation

advantages compared to the older FAT. FAT32 drives are Windows-

supported by default and can be defragmented without any problem

using O&O Defrag.

NTFS

The NT file system was developed completely new for the Windows

NT family. It offers the option of security restrictions on the file level,

increases the security against data errors, and achieves higher per-

formance.

It is supported by Windows. And O&O Defrag gets optimal results

when defragmenting NTFS drives.

EFS A file system introduced with Windows 2000 which is based on NTFS

and its encryption ensures higher data security against abuse or

unauthorized access. The Encrypted File System (EFS) makes data

for unauthorized users unreadable. O&O Defrag supports EFS hard

disks; neither data integrity nor data security is compromized.

Free space needed for defragmentation

The following limitations are valid for O&O Defrag. These are caused by Windows and cannot be circumvented.

Size of Drive

All 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 of

a drive is therefore irrelevant.

Folders

Any number of folders can be defragmented. O&O Defrag has an optimized memory management which allows it to

record all file and folder information.

Free hard disk space

Drives without any free disk space cannot be defragmented. For the best possible results, at least 5% of the whole

hard disk capacity should be free. Files larger than the maximum free and connected storage space, may not be pos-

sible to defragment, and if so only with several runs.

To accelerate defragmentation, we recommend reserving at least 10-15% free hard disk space, however, this per-

centage decreases the higher the hard disk size is. What really matters is the size of the largest file that needs to be

defragmented or moved around. For an optimal defragmentation, the file should have enough connected storage space

available.