Noun
defragmentation (countable and uncountable, plural defragmentations)
(computing) The action of defragmenting, particularly with respect to a computer disk or drive.
Although automatic defragmentation is intended to reduce access delays, performance will be temporarily reduced while the procedure is in progress. Source: Internet
A true defragmentation tool does not exist for ext3. Source: Internet
Since many fragments are created for compressible files, defragmentation may take longer. Source: Internet
Some computer operating systems perform defragmentation automatically. Source: Internet
This image shows a disk defragmentation in progress. Source: Internet
Disk defragmentation -- how beneficial is it really? Source: Internet