 Continuous and secured access to critical data is a need for the smooth
and profitable operation of most businesses. Loss of thousands of
dollars can result from the loss of any data. Recovery of the lost data
can sometimes happen and can take up huge working hours. Therefore,
data protection and data backup are of key importance.
Data Backup
In the dictionary of information technology, copying of data is
referred to as data backup. If the original data is lost, these
additional copies of data are used for restoration of the lost data.
Data backup usually refers to these additional copies. The purpose of
traditional backup is two-dimensional. Restoration of a state after a
disaster is the primary purpose of data backup. The secondary purpose
of data backup is restoration of files in small numbers following their
accidental deletion or corruption. Data backup is the ultimate means of
defense against the loss of data. It is in brief, the process of data
protection.
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With the turn of century, the world is witnessing a ‘shift of paradigm’
from information society to knowledge society. Data, information and
knowledge have become the pillars of development and progress of the
society. Computer technology has been instrumental in processing of
data and information and creation of knowledge in the making of 21st
century. Business, intelligence and technology have received the fillip
with advanced information systems and intelligent knowledge. The new
channels of knowledge sharing have given rise to human and information
networks.
The advanced computers today are even capable of making human
intervention. These machines are designed to accept data as input,
process data and generate decisions and actions accordingly. If a human
brain performs the same task, we consider his/her intelligence,
knowledge and expertise as the key. For some people computers are
devices, which have been designed to process knowledge.
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As Information Technology evolves, newer requirements surface everyday.
Today’s corporate houses handle lots and lots of data. For proper
information dissemination and for economic storage purposes, the need
for data movement and migration has been felt in the Information
Technology arena. Today’s article is devoted to two concepts that has
become cornerstone in today’s corporate I.T. environment.
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What is “data recovery”?
The entire process of recovering lost data from some damaged secondary
storage media is termed as data recovery. The salvaging of the many
important data is done when the secondary storage device fails to
function normally. In such cases, the data are retrieved from several
electronic storage devices such as the CDs, DVDs, many hard disk
drives, storage tapes and various other storage formats. The disk
damage can be of two major kinds, viz. the physical damage to the
storage device or the logical damage of the files stored. The
recovering of lost data therefore includes both the physical damage
recovery as well as the logical damage recovery. The recovery process
also involves the salvaging and securing of some deleted stuffs from
the storage disk or device.
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In order to maintain data integrity in unreliable storage media, error detection and correction becomes an important tool. Error detection generally refers to the ability to search out errors that occur during transmission of information from the transmitter to the receiver. After the errors are sorted out reconstruction of the original, unflawed data becomes possible. Data error detection for channel code and error correcting system protocol follows two principles: Be first to comment this article | Add as favourites (244) | Quote this article on your site |
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