Defragmentation?

How does defragmentation work? It say it can take from a couple of minutes to a couple of hours. I tried it and i judge it took a GB out of my hard disk? Is that supposed to begin and if not what go wrong?

Defragmentation?

Defragmentation should not reduce your disk space. Files are composed of fixed-size clusters. For optimal value, the clusters which make up a single record should be contiguous. Sometimes, as files grow, the operating system is unable to allocate contiguous clusters. So you hold one piece of a file far away from another piece on the disk.



Defragmentation simply shuffles your clusters around until adjectives files are contiguous or it determines it just can't do any better. It's a complex algorithm and can markedly take a long time. The primary factor on elapsed time are (1) how full your disk is and (2) how long since your last defragmentation. It is best to defragment your disk regularly even if it isn't fundamentally full. If you wait until it's almost full, defragmentation is totally difficult and will run for hours with lone partial success. The more free space on your disk, the more latitude the defragmentation algorithm have to move things around.
that's all a defrag does is position files surrounded by a better order so that the computer will run smother that's the non sceintic answer but you should do one monthly to hold on to your computer at top speed .don't worry just about missing gig it its a moment ago used it up to store things more effecenty