Error handling in hard disk, Computer Engineering

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.

 

 

Posted Date: 10/13/2012 6:19:02 AM | Location : United States







Related Discussions:- Error handling in hard disk, Assignment Help, Ask Question on Error handling in hard disk, Get Answer, Expert's Help, Error handling in hard disk Discussions

Write discussion on Error handling in hard disk
Your posts are moderated
Related Questions
Q. Illustration of Display on Video Monitor? Displaying a single character ; display contents of BL register (Presume that it has a single character) MOV AH, 02H MOV D

Interfacing Subroutines with Parameter Passing Let's now write a C program which calls the assembly program for parameter passing. Let's extend the previous two programs such t

Data can be moved from one field to another using a 'Write:' Statement and stored in the desired format.  Write: Date_1 to Date_2 format DD/MM/YY.

Binning process is very helpful to save space. Performance may differ depending upon the query generated sometimes solution to a query can come within some seconds and sometimes it

What is big endian and little endian format? The name big endian is used when lower byte addresses are used for the more important of the word. The name little endian is used f

Representation scheme in AI: • It's fairly trouble-free to represent knowledge in this way. It allows us to be expressive enough to represent largely knowledge, while being co

Q. Explain about Floating Point Representation? Floating-point number representation includes two parts. The first part of number is a signed fixed-point number which is called

Example of Weight training calculations: Through having calculated all the error values associated with such each unit like hidden and output then we can now transfer this inf

Q. Illustrate the Cache Memory Operation? It comprises a copy of a part of main memory contents. When a program is running and CPU tries to read a word of memory (instruction o

What are the restrictions on Subscreens? Subscreens have various restrictions.  They cannot: Set their own GUI status Have a named OK code Call another screen