To rearrange disk clusters to be contiguous

Akronim: Defragment

Defragment
A process for rearranging the clusters on a disk for each file so that they are
adjacent rather than scattered all over the disk.
Files with adjacent clusters are quicker to read (because this
minimises any required movement of the disk heads), than if the clusters
are scattered all over the disk (because that requires frequent movement
of the disk read heads). For this reason a computer with a defragemented
disk (i.e. with all its files defragmented) will run faster than if it
had a heavily fragemented disk - but only for disk related operations.
Relevant links:

www.kessels.com/JkDefrag/ - Free (under GNU general public
license) disk defrag utility for all versions of Windows from
Windows 2000 onwards. Source code available.

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