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английский) 3:
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some of the devices mentioned above can perform both the input and output functions. magnetic disc, magnetic diskette and magnetic tape are examples of such devices. magnetic discs, diskettes, and tapes can record data as output from the stor¬age and can also serve as input devices for the data to the primary storage.data are recorded on magnetic discs, magnetic tapes ei¬ther by outputting the data from primary storage or by using a data recorder. data recorders are not input devices, and they are not connected to the computer system. instead they are offline recorders. the magnetic media recording devices are key to disk, key to diskette, and key to tape machines.key to disk devices are used as data recording stations in multistation shared processor systems. they are able to correct data before storing it on a magnetic disk and before its entry into the main computer system.key to diskette systems store data on flexible discs, and diskettes. Diskettes are they and reusable.the key to tape devices can record data on reels, on cassettes, and on tape cartridges. the magnetic tape reels produced by key to tape systems are in a computer - compatible format for subsequent direct data input into a computer. however, data on the cartridges and cassettes often are transferred to high - speed media, such as a full - sized reel of magnetic tape or magnetic disc for data transfer to the computer.
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