As I explained in a previous article about defragment (re-arrange the files fragmented) occurred due to fragmentation.
Defragment is a process to handle files that are experiencing the fragmentation in the area of Storage. Here a file is said to be fragmented in that file is not sector-sector occupies the adjacent each other in storage. Fragmentation can cause system storage media perform seektime (search data) are a lot more, so in other words, fragmented files can slow down the work of the system, particularly at the time of the operation with regard to the storage media.
Fragmentation can occur in the following conditions :
Too many partitions will slow down the performance of your computer system, because what? Sector will be made so that more and more older than seektime storage that not many partitions.
At the moment the user create files, partition where users want to save the file does not have the allocation unit are each big enough to store the files in question. The file system will break up the file into several fragments, before it is stored in a storage medium.
When users edit the file, the file was "Swell" allocation unit exceeds the previously allocated by the file system to the file in question.
When a file allocation unit spends all that has been allocated, then the file system will allocate an additional allocation unit gained from allocation unit that has not been allocated (still free), on an adjacent site, or sometimes far apart.
At a time when the sector is allocated to each file system far apart, then it can be said that these files are fragmented, because files are stored in a few fragments that are not arranged in close together.