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. Pros and Cons of general purpose register architecture? General Purpose Register Architecture: Pros and Cons Registers can be employed to store variables as it decrea

Why does IPV6 use separate extension headers? Explain. The extension headers in Ipv6 are utilized for economy and extensibility. Partitioning the datagram functionality in sepa

Canonical genetic algorithm - Mating: In such a scenario this continues until the number of offspring that is produced is the required number. Further this required number is

The Work Systems Framework - Information System Adler writing in 1992 used the phrase 'stumbling backwards into the future' to describe the neglect organisations at that time

Higher Order Predicate Logic: In first order predicate logic, we are allowed to quantify over objects only. If we let  ourselves  to  quantify  over  predicate  or  function  s

Explain differences between folded and non-folded network. Folded network: While all the inlets/outlets are connected to the subscriber lines, the logical connection shows as

data dictionary for online banking system in software engineering

What is slack? 'Slack' is the amount of time you have which is measured through while an event ‘really happens' and while it ‘should happen’. The term ‘really happens' can a

State the term in detail $strobe $strobe. This task is very similar to $display task except for a slight difference.  If many other statements are executed in same time unit as

Explain in detail about the Random Scan Display   This device using CRT directs the electron beam only to the parts of the screen where a picture is to be drawn. This kind of d