RAID DATA RECOVERY 	           

Overview

RAID which stands for “redundant array of independent disks” is an encompassing term that is used to define data storage procedures that divide and store data across multiple drives. It implemented to make a system efficient and reliable by taking care of faults or shortcomings in that system. This process of fault tolerance and maintaining or retaining data can be done by various concepts in RAID like mirroring, parity or having an altogether different disk for the only purpose of keeping the data safe and increasing the performance of the system in more reliable and efficient manner.

RAID Technology:

RAID is implemented by using multiple hard-disks along with a RAID controller.
The technology that is used for RAID drives is mirroring or copying and saving the original hard-disk or the content of that disk for implementing reliability in the system by fault tolerance technique. In mirroring, redundancy of data is achieved using parity check. As we all know that mirroring simply means looking at the image of yours or in other words having an exact copy. Data mirroring use in RAID is exactly the same in which same data is copied on two different drives.

A question arises “what is the need to have same data on two different drives?”
The answer is to achieve a system which can tolerate any kinds of faults or any unexpected dangers. This copying of data helps in fault tolerance in a way that if the system crashes abruptly or there is a system failure or a person is unable to reach to the data on a particular drive than there is this mirrored or copied disk which behaves like a helping hand. In case of a crash RAID controller automatically rebuilds and restore the data of the crashed system. There are different types of RAID or we can say that there are different levels of RAID namely RAID 0,RAID1,RAID 1+0,RAID 3,RAID 4,RAID 5,adaptive RAID and RAID 6,the technology used in all these types may vary but the basic concept of data copying remains same.


Advantages Of RAID
Disadvantages Of RAID
Provides a reliable and an efficient system

To be RAID enabled, systems have to support RAID drives

Implements fault tolerance using redundant data

Complexity of designing and maintaining
It keeps a check on any possibility of system crashes

Expensive

RAID failure and Data Recovery

Even the most well designed systems are susceptible to malfunctions and RAID systems can hardly be an exception to this rule.  The major causes which can lead  to such disruptions include

* Fault in the RAID controller
* Cascading failure across drives
* Accidental or unintentional reformatting of the drive
* Loss of array configuration 

The best way to go ahead in case of a RAID failure is to contact a reputed data recovery service provider. You must be very sure about the credentials of the organization you are approaching since losing crucial business data can cause serious issues. Specialized firms are capable of recovering your data in most cases. They can complete intricate sector to sector dumps and make images of your existing data. Further they have sophisticated proprietary software that helps them recover data quickly across spanned volumes.  
























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