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Write explanatory notes on Hard disk drive controller.
Hard disk drive controller: It converts instructions from software running upon the computer to the electrical signals needed to operate the hard disk. The function of a disk controller is track and sector selection, disk drive selection and head loading, parallel to serial conversion and to parallel of data and error checking. The data recorded in a magnetic disk is the combination of data and clock. Thus, data read should be separated from the clock information. The data processed through a CPU or stored in the main memory is into the byte form. The bytes to be recorded upon a magnetic disk should be converted in serial format.
Q . Materials that can store electrical energy are called (A) magnetic materials. (B) semi conductors. (C) dielectric materials. (D) super conductors. Ans: C
Q. What is Work-Sharing Constructs? A work-sharing construct distributes execution of associated region amongst the members of team which encounters it. A work-sharing construc
Q. The self and mutual inductances of a machine with two windings are given by L 11 = (1 +sin θ), L 22 = 2(1 + sin θ), and L 12 = L 21 = M = (1-sin θ). Assuming θ = 45°, and le
Q. Determine the Thevenin resistance viewed from terminals A-B of the circuit of Figure by setting independent sources to be zero and applying a test voltage at terminals A-B.
Q. A person, while driving a car in a cyclone and waiting at an intersection, hears a thumping sound when a power line falls across the car and makes contact with the chassis. The
Merits: 1. It is very simple to shift the operating point anywhere in the active region by just changing the base resistor (R B ). 2. A very small number of compon
Binary Multiplication Multiplication can be seen as multiple additions. For example if we have to multiple 4 and 8 we can 8, 4 time to get the solution. Actually this conc
how do you work it out if there are 3 sources in parallel?
Why Monitoring and control done? Monitoring and control using microprocessors/computers is often done for the below reasons: - It is safer (faster response to non-standar
Metering Standards Relevant standards on metering are given in Table. Table: Relevant Metering Standards Standards Description
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