Repairing A Damaged Cd

OK, so we get asked all the time, why do compact discs get damaged

?. Even though Compact discs are all plastic, theyre not sensitive to magnetic fields as was the case with floppy discs, which never used to retain data when even a slight magnetic field came into contact with the floppy disc. Alright so then what is the reason why CDs get corrupted?

CDs work on the principle of reflection of light. CD drives have a built in laser that is used to read data. When the laser is focused on to the CD, the beam get reflected to a point when there is some data on that are i.e. 0 or 1 the points where light beam lands back is different which symbolizes the bit value.

When something on the CD breaks the path of the laser light, something like dust particles or something else like a FINGER PRINT!!!. Finger prints are nothing but natural oil from skin that sticks to the surface in contact with the skin in a pattern of skin cells. This oil or say fingerprint helps in refraction of light and loss of data to the reading source i.e. laser.

When CDs dont run the reason is because something is interrupting the laser to read the shinny side of the CD. OK so you have important data what should you do now?

Most of the times it is because of dust or fingerprints, you need to clean the CD. You can clean your CDs with plain water or a bit soapy water. And it is better to clean the CDs after a little time. But this doesnt mean you should start putting your CDs in dishwasher or washing machine every week.

All you need to do is to wipe the shinny side of the CD with a clean moist cloth and try running it again make sure the CD is dry before you run it.

People say about using all different sorts of things to clean CDs like toothpastes, wax polish etc. PLEASE DONT DO THAT, I would recommend youbuy a CD cleaning/repair kit. Also, DVDs work on the same principles, but are a bit more sensitive to dust and fingerprints.

by: sam Cain

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