When addressing system performance issues, a key element that is often overlooked is Disk Fragmentation. Even on a brand new system with plenty of RAM and high-end processors, the performance of the hard disk may be a bottleneck causing system performance issues. It takes time to load large data files into memory - issues become particularly noticeable when dealing with movies, video clips, database files or .ISO image files which may easily be several gigabytes in size. On a freshly formatted disk, these files load fairly quickly. Over time, however you may start to notice performance degradation - caused by disk fragmentation.
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