"Aster" wrote in message
...
snip

Also, according to microsoft, the volume must have at least 15 percent
free space for Defrag to completely and adequately defragment it. Defrag
uses this space as a sorting area for file fragments. If a volume has less
than 15 percent free space, Defrag only partially defragments it. So, if
my 20Gb hard drive has only 1.53Gb free space and I have performed defrag,
my volume has been just partially defragmented?

Partial defragging probably means that free space was not consolidated. In
other words, files are no longer fragmented, but free space is. This might
mean that the disk becomes fragmented more quickly as you use it. However
partial might also mean that larger files were skipped, or were consolidated
into a small number of large fragments rather than being fully defragged.