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Disk Defragmenter overview

Updated: January 21, 2005

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

Disk Defragmenter overview

Disk Defragmenter and the Defrag command analyze local volumes and consolidate fragmented files and folders so that each occupies a single, contiguous space on the volume. As a result, your system can access files and folders and save new ones more efficiently. By consolidating your files and folders, Disk Defragmenter also consolidates a volume's free space, making it less likely that new files will be fragmented. The process of consolidating fragmented files and folders is called defragmentation.

The amount of time that defragmentation takes depends on several factors, including the size of the volume, the number and size of files on the volume, the amount of fragmentation, and the available local system resources. You can find the fragmented files and folders before defragmenting them by analyzing the volume first. You can then see how fragmented the volume is and decide whether you would benefit from defragmenting the volume. For step-by-step instructions describing how to analyze or defragment a volume, see Analyze a volume and Defragment a volume.

Disk Defragmenter can defragment volumes that are formatted with the file allocation table (FAT) file system, the FAT32 file system, and the NTFS file system.

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