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A Given Computer System Includes a Hard Disk with Direct

question 4

Essay

A given computer system includes a hard disk with direct memory access (DMA).
(a) Suppose a user application needs to change a single byte within a disk block. Sketch, in order, all communications that must take place between the processor and the hard drive to complete this operation.


Definitions:

Atm

A unit of pressure defined as being equal to the pressure exerted by the Earth's atmosphere at sea level; approximately 101.325 kPa.

Volume

The amount of space that a substance or object occupies, or that is enclosed within a container.

°C

a unit of temperature on the Celsius scale, a measure relative to 0°C for the freezing point and 100°C for the boiling point of water at sea level.

Atm

An abbreviation for atmosphere, a unit of pressure equal to the pressure exerted by the Earth's atmosphere at sea level.

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