It is highly recommended that you defragment your disks on regular basis. Over time, as files are created, removed, moved, copied and edited, they become fragmented. Whwn a file is written to disk, it is written to disk,it is wrtitten to clusters. Clusters are tiny parts of drive where information is stored. A file may take several clustors and the clustors might not be contigous. When a file is moved or deleted,often the noncontigous clusters are not removed as well, thereby creating a fragment. The process of defragmenting removes lost clustors and also reorders clusters in a more efficient orders. Defragmenting will improve the perfomance of your computer.
You must have approximately 15 percent free space available to ddefragment a drive.If you don't have adequate disk space, you will need to free up some space before defragmenting. You may also have to defragment several times to achieve the disired results.
Note : It is recommended that you defragment disks every 1-2 months.If a computer's disk perfomance is suffering and no new changes have been made for several months, defragmenting the disk is possible fix.
The two major drawbacks to the disk defragmenter included with windows operating system are that it is not only capable of using a single processor and a defragment cannot be scheduled. Although visual basic can be used to make the windows defragmenter work, it requires additional knowledge of scripting. There are some excellent third party products available with scheduling and multiple processor capabilities. Diskeeper 7.0 by executive software and defrag manager by Winternals are highly aclaimed defragmenting tools. The intresting thing is, when you install diskeeper,it installs the product directoly into the computer managemnt snap-in, and you see it just like you would the basic defragmenter that ships with microsoft.
You can access the disk Defragmenter in three diffrent ways:
1 Click start ! all programs ! accesories ! System tools ! defragmenter.
2 From the computer management snap in, expand the storage node and click disk
3 From my computer, right click the drive you want to defragment and select properties from the drop down list
Once the defragment open, click the tools button and select Defragment Now.