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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.
consider the 8 bit floating point format including support for normalised nimbers and nonnumeric values.it included 3 bits for mantissa and 4 bitys for excess 7 exponent
Q. What do you mean by Perfect Shuffle Permutation? Perfect Shuffle Permutation: It was proposed by Harold Stone (1971). Consider N objects each is represented by n bit number
What is a Priority Interrupt? Ans: A priority interrupt is a type of interrupt that establishes a priority over the many sources to determine which condition is to be serviced
A grammar for a programming language is a formal description of ? Structure is a formal description for a programming language.
Why data bus is bidirectional and address bus is unidirectional in most microprocessors? The data bus is bidirectional because the data bus has to transfer data among the CPU a
Explain any three parsing techniques. Following are three parsing techniques: Top-down parsing: This parsing can be viewed as an attempt to get left-most derivations of an
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Calculating Block Size: B A unit of associatively -one tag for B A words B T unit of transfer-B T words to/from primary memory as a unit One valid bit for
#what is nicol prism.its construction and working
Explain the concept of top-down design for a program. Top down Design: A top-down approach is fundamentally breaking down a system to gain insight into its compositional s
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