Defrag 101 - Page 5

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“Certain Areas Of My Hard Drive Are Faster Than Others. Really?”

Your hard drive consists of circular platters that rotate at tremendous rates - typically 5,000 to 10,000 rpm. When a circular object is rotating the angular velocity at the outside of the rotating circle is much greater than the angular velocity at the inside. This phenomenon of angular velocity means that data that is physically on the outermost area of the spinning platters has a higher angular velocity and therefore a higher read and transfer rate than data that exists on the innermost platters.

The data transfer rate is about doubled for files that are on the outermost track compared with the innermost track!

Wouldn't it make sense to put the files you use the most on the faster outermost tracks of your hard drive? It makes perfect sense doesn't it?

This way, all the data from the you are accessing most of the time is being read about 50% faster than it otherwise would on average. That precious area of faster performance certainly needs not be occupied by files you rarely use.

This is where the value of Pareto's Law comes into play.

Pareto's Law or the (80/20 rule) states that 80% of the time you use the same 20% of your files.

UltimateDefrag determines your most frequently used files (or you can also choose specific favorites) and places them on those faster performing outer tracks of your hard drive platters. This clever manipulation of your file positions gives you far more performance improvement than the defragmenting of a fragmented file.

So that's one step we have achieved. We have improved average file transfer performance by an average of 50% and up to 100%. Next comes the speeding up of the most significant contributor to reduced hard drive performance....


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