Data is precious and is like an asset, and this must be saved anyways, though data recovery or hard drive restoration is not feasible to be carried in all situations.
There are several reasons behind data loss:
Unintentional removal, suppression or format of data
Operating system calamity or crash of any software program
Computer virus or Trojan Infection
Nasty removal, suppression or format of data
Physical damage to storage medium
The most normal and repeated form of data destruction is unintentional deletion, but with some simple steps hundred percent recovery of data is possible. Operating system calamity or crash of any software program is also a general cause to data damage, though data may still remain saved on the hard drive.
The data contamination is also caused due to precipitated system failures, where failure may be due to computer bug and computer infections. The restoration depends on the percentage of destruction caused. If the data is destroyed or erased by any means is major downfall occurred.
The data restoration in several cases varies conditionally upon the skillfulness and effectiveness of the person providing such support.
Most extreme cases of data loss occurred during disastrous hardware failure, since most of the data is involves with the hard drive and is difficult to read data after physical impairment. Still specialized methods are there to recover such data but in a little expensive manner.
The data restoration is simply stated as recovering important data from damaged, tainted or inaccessible external and internal hard drives. Multiple techniques are practiced for recovering lost files and documents.
The index reference of a file is altered when you delete or format certain file on your computer, where index reference is the file allocation table reference and due to this alteration file doesn't appear in any directory views, and hence it means that data is not completely wiped out from the hard drive.
For restoring lost data multiple commercial and free applications are available, which effectively works in all sectors of the hard drive and this ensure data to be recovered.
The physical damage to the hard drive will obstruct the workability of this software. The specialist reading tools are provided, which are a part of mechanical recovery and it directly read the hard disk sectors.
The sudden information loss caused by hazardous softwares and process breakdowns, is emphasizing strongly on restoration applications.
Ultimately selection of data restoration technique should be simple, reasonable as well as easy to use and should be compatible with any storage device.