Word: disks
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Stern graduated with good grades from prestigious Boston University, and has assembled an unbroken onward-and-upward resume of better and better radio jobs ever since. Limbaugh dropped out of Southeast Missouri State after a year and had a nondescript disk-jockey and p.r. career, getting fired from five jobs during his 20s and 30s. Howard met his wife in college 19 years ago, married her four years later and proudly says he has been faithful to her. Alison Stern, the very picture of the cheerful, wholesome middle-American housewife, raises their three daughters, ages 9 months to 10 years...
Hanging over the surface of each platter is a tiny metal head which reads and writes data on the disk, much like the mechanism used in a tape recorder. During normal operations, the head never comes into direct contact with the platter's surface...
Take the hard disk, for example. A hard disk, also known as a hard drive or fixed disk, consists of several plastic platters housed in a sealed box. The platters, whose surfaces are covered with magnetic material used to store information, usually spin at very high speed, typically at 4500 rounds per minute...
...because the head is very, very close to the platter surface--typically only one one-thousandth of an inch away--any physical shock to the hard disk could well cause the metal head to scratch over the platter surface and destroy whatever information that's stored in the path. Such damages are physical and therefore unrecoverable: your data is simply lost forever...
...spare yourself from this type of disaster, never move your computer around while the hard disk is working (i.e. when the hard drive indicator light on your casing is lit). This is especially applicable to notebook computers, since they are often used on the road...