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In the context of administering computer systems, defragmentation is a process that reduces the amount of fragmentation in file systems. It does this by physically organizing the contents of the mass storage device to store files in a contiguous region if possible, or in the smallest possible number of regions (fragments) if not. It also attempts to create larger regions of free space using compaction to impede the return of fragmentation. Some defragmenters also try to keep smaller files within a single directory together, as they are often accessed in sequence.
Defragmentation is advantageous and relevant to file systems on electromechanical disk drives. The movement of the hard drive's read/write heads over different areas of the disk when accessing fragmented files is slower, compared to accessing the entire contents of a non-fragmented file sequentially without moving the read/write heads to seek other fragments.
The 2011 Member Choice Poll for Disk Defragmentation showed the following results.
26% of the members voted Windows as their primary defrag program and personal top preference in this years poll for 2011.
As for a lot of members that use third party software, Auslogics and PerfectDisk were the leading top candidates with 16% of the votes each.
Rounding out finishers with 10% or more was Piriform Defraggler with 11% of the votes.
The remaining 35% of the votes were spread throughout the other choices.
All the applications we examined are below:
Ashampoo Magical Defrag 3
Auslogics Disk Defrag
DirMS & Buzzsaw
JKDefrag & MyDefrag
Iobit Smart Defrag
O O Defrag
Partition Logic Defrag
Rapid File Defragmentor