Input Output Management

An input device is an electromechanical device that generates data from computer to read.

An input device is an electromechanical device that accepts data from computer.

Device controller: -

                A device controller is a hardware unit which is attached with input/output bus of the computer and provides a hardware interface between the computer and the input/output device.

Device driver: -                                                                                                                 

A device driver is a software module that controls various I/O device through the device controller.

Input/output functions: -

        1.     Programmed I/O

        2.     Interrupt-driven I/O

        3.     DMA (Direct memory access)

Types of I/O devices

         1.    Block oriented devices

         2.    Stream oriented devices

Disk scheduling

Input/output Disk

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