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In the maintenance of file systems, defragmentation is a process that reduces the degree of fragmentation.It does this by physically organizing the contents of the mass storage device used to store files into the smallest number of contiguous regions (fragments, extents).
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Just as compaction can eliminate external fragmentation, data fragmentation can be eliminated by rearranging data storage so that related pieces are close together. For example, the primary job of a defragmentation tool is to rearrange blocks on disk so that the blocks of each file are contiguous. Most defragmenting utilities also attempt to ...
If the page file is fragmented, PageDefrag can take as long or longer than Windows Defrag. However, a defragmentation of the page file can improve performance much more than defragmentation of the Registry will. PageDefrag does not defragment the contents of the registry files, only the placement of these files on the hard drive.
JkDefrag is a free open-source disk defragmenting utility computer program for Windows.It was developed by Jeroen Kessels (initials "JK", hence the name) beginning in 2004 [1] and was released under the GNU General Public License.
The command line utility, Defrag.exe, offers more control over the defragmentation process, such as performing a full defragmentation by consolidating all file fragments regardless of size. [14] This utility can be used to defragment specific volumes or to just analyze volumes as the defragmenter would in Windows XP .
Defraggler is a freemium defragmentation utility developed by Piriform Software, which can defragment individual files or groups of files on computer memory systems. Defraggler runs on Microsoft Windows; it has support for all versions since Windows XP. It includes support for both IA-32 and x64 versions of these operating systems.
O&O Defrag is a Windows defragmentation utility sold by German software developer O&O Software. It has won several awards [1] by PC journals and magazines, and is certified by Microsoft [citation needed] for all its current NTFS-based operating systems, including NT 4.0, 2000, XP, Vista, 7, 8, 8.1, 10, 11, Server 2003, 2008, 2008 R2, 2012, 2012 R2, 2016, 2019 and 2022.