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Scandisk and Disk Defragmenter - General Principles
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Your computer probably stores nearly all of its information on what is called the "Hard Disk Drive" (HDD). This is inside your computer within a sealed unit and should not be confused with the floppy disk drive or CD-ROM drive, for which there are slots in the front of your computer.
If you were to open the HDD you would see what looks a bit like an old fashionned gramophone record player. However, unlike a record player, there is no needle in physical contact with physical grooves.
In the case of your HDD, a magnetic head is suspended a few millionths of an inch above the disk on which the information is stored in magnetic form. The disc rotates and the head reads information from and writes information to specified sectors on the disk. This information is initially stored in your computer's working memory until you decide to save it (write it) onto the HDD (i.e. your computer's storage memory).
There are basically three problems which can arise with this process, which Scandisk and Defrag address:
- The information can be mis-written onto the disk.
- The disk itself can become physically damaged.
- The data on the disk can become scattered (fragmented) all over the disk.
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