Floppy

Published on November 2019 | Categories: Documents | Downloads: 42 | Comments: 0 | Views: 352
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STORAGE

DEVICE

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INTRODUCTION  The storage device is an essential component in digital computer.It is needed for storing the programs & data.  There are 2 types of storage device. 1. Primary 2. Secondary Secondary memory device such 2 as magnetic & tapes contain

DISK DRIVES Disk drives are usually refer to secondary storage device (ROM). Information stored i most type of drives can be accessed & update quickly & easily. Disk drives read from & write to the media i a serial format.  There are several types of disk drives given bellow 1. FLOPPY DISSK DRIVES. 2. HARD DISK DRIVES 3

FLOPPY DRIVES A floppy dives is an essential type of  storage device.a disk drive with removable disk is called as floppy drive.  The disk used with a floppy drive are small removable disk made by plastic , coated with magnetic recording material . A floppy drive has a media ,a floppy disk that is easily removable & small in physical size and /or capacity.

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IDENTIFICATION OF FLOPPY DISK  • IF WE HAVE TO IDENTIFY BETWEEN HARD DISK & FLOPPY DISK THEN FOLLOWING POINT ARE PRESENT 1. IN THE CASE OF FLOPPY DISK HEAD ALWAYS TOUCHS THE DISK. 2. IN THE CASE OF HARD DISK IS ALWAYS SPINNING.

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Construction of floppy drive  The floppy disk is made by nonmagnetic material, while it is coated by magnetic material which is used to store the data. there are read & write head used to read & write on the disk respectively.  There are stepping motor is used to move the head according to controller pin. Disk hub is used to clamp the disk for spinning of disk to access the desire portion of disk Whole structure is covered by shell , while disk is protected by liner. Insertion key, write p. key is also situated. 6

MECHANICAL DESIGN  To carry out their design purpose ,we have to study it’s mechanical design. Speed control  A servo system keeps the disk spinning at the correct speed. HEAD SPEED CONTROL The stepper motor moves the head with respect to appropriate voltage pulses. HEAD INDEXING  The head can put on a right place with assurance ,the resorts to a process called 18 “INDEXING”.

USES & APPLICATION  The application of floppy drive are as follows 2. These are used as the main type of  secondary storage device. 3. We can transfer the information from one computer to another computer. 4. To provide the backup or save the copy of information contain in the hard disk. 5. Unlike the audio & video disk ,when we get copy of copy of program 19 quality is not degrade.

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