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Error handling in Hard disk in computer architecture:
Modern drives also make widespread use of Error Correcting Codes (ECCs), specifically Reed-Solomon error correction. These techniques store additional bits for each block of data that are resolute by mathematical formulas. The extra bits permit many errors to be fixed. Whereas these additional bits occupy space on the hard drive, they permit higher recording densities to be employed, resulting in much higher storage capacity for user data. In the year 2009, in the newest drives, low-density parity-check codes (LDPC) are supplanting Reed-Solomon. LDPC codes are able performance near to the Shannon Limit and therefore allow for the highest storage density available.
Typical hard drives effort to "remap" the data in a physical sector that will be bad to a spare physical sector-hopefully whilst the number of errors in that bad sector is still little enough that the E CC can fully recover the data without loss.
Functionality under load can be tested by running various Vusers concurrently. By enhancing the amount of Vusers, we can verify how much load the server can sustain.
The main I/O used by micro controllers are the parallel ports , the 68HC11F1 has seven 8 bit ports namely Port A,B,C,D,E,F and G . The use of ports depends on the mode configurati
shorte note on hardware description language
Q. Explain Active Matrix or Thin Film Transistor technology? This is known as TFT (Thin Film Transistor) technology. In this there is a transistor at every pixel acting as a r
Explain FIFO Page replacement algorithm. FIFO policy: This policy only removes pages in the order they entered in the main memory. By using this policy we simply eliminate a
Determine the types of Sensors Different types of sensors are used to give real time information to computers. Frequently, an analogue to digital converter (ADC) is required a
Subtraction of 01000-01001 using 2's complement method. Ans. Firstly 1's complement of 01001 is 10110 and 2's complement is 10110+ 1 =10111. Thus 01000 = 01000 - 01001
Why pointer variable sometimes desirable to pass a pointer to a function as an argument? Frequently, a called function needs to make changes to objects declared in the calling
Program: A good illustration of code conversion: Write a program to convert a; 4-digit BCD number into its binary equivalent. BCD number is stored as a; word in memory location kno
This unit introduces the most important ID terminology, explains why ID is important, and gives a description of the main ID activities and the characteristics of the ID process. I
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