软盘驱动器工作原理与维护(外国英文资料).docVIP

软盘驱动器工作原理与维护(国外英文资料) Working principle and maintenance of floppy disk drives Yi-hua hu The 1995-01-06 A, floppy disk structure Diskette is often called a floppy disk, is a kind of computer used in data storage, it is to use magnetic characteristics of the object under the action of magnetic field, magnetizing, to store data. To facilitate data access, the data on disk is stored in a circular disk. If the magnetic material is attached to a soft disk, the disk is called a floppy disk.  Commonly used disk storage capacity can be divided into: general density (SD), double density (DD), and high density (HD).  (1) the structure of a floppy disk, for example, is a 5.25-inch floppy disk, as shown in figure 1.  Label the label on the label, the permanent label and the users label.    The disc is located in the center of the plastic cover, which is the center of the disc holder with a larger circular hole actuator, which can jam the card hole in the center of the disc.  3. Read and write hole Plastic sleeve also has a large cylindrical shape of the hole, for double-sided floppy disk, the shape of both sides of the sleeve are exactly the same two holes, tallies up and down. The read/write head of the drive must pass through the two holes to make direct contact with the exposed disk surface, reading or writing information.  4. Index hole is used to determine the starting position of the floppy disk sector, when the disc rotation disc on the hole and the hole on the sleeve, drive index of photoelectric detection device is a photoelectric signal was detected, known as the index sign, to locate on the disk sector.  Write a small square gap on the side edge of the plastic cover of the protective gap disk. This is the write protection gap. When used in adhesive paper, you cannot write information to the disk. You can only read (3 inch floppy disk write protection gap on the lower left corner of the disk, and there is a switch). (2)  the magnetic recording data process No