Data Recovery

Data recovery is the process of obtaining data from inaccessible storage media and corrupted or deleted file sets.
Computers, digital cameras, MP3 players, Mobile phone ,etc store data on some type of electronic media such as hard disk drives, diskettes or flash devices. Each type of media presents different recovery challenges. The data recovery process is very complex and labor intensive. Successful data recovery requires an intimate understanding of all of the technical details of modern data storage media, operating systems and file systems.
Logical Failures
A logical failure is when the media has not been physically damaged. A file may have been deleted, reformatted or contaminated with a virus. Generally, in these situations, data is easier to recover as long as the data has not been overwritten by subsequent usage.
When files are deleted, a lot of pointers to the data are still left lying around. Because of this, recovering deleted files can be done with data recovery tools very easily. And also it is easy toData Data recovery denver or even a corrupted system file - rather than actual loss of data. All you need to do in this case is read the disk using another computer, so you can copy the files you need to a safe place.
Even if a disk has been formatted, the chances of recovering the files that were on it are good. Formatting a disk destroys the root directory, so the names of the files and folders within it are lost. However, the root directory normally holds only a few system files, which are easily restored, and the top-level folders. Data recovery software can identify the data blocks that were used to store the top-level folder directory lists because they have a characteristic pattern. Since hard disk formatting is non-destructive, these top-level folders and their contents (including all the subfolders) can be recovered intact. All you need to do is supply the original folder names, and all your data is back!
Physical Failures

A physical failure is when the media has been damaged or experienced a mechanical failure. Fire or water damage can result in a physical failure or, in the case of a disk drive, part of the mechanism such as a spindle or head may have failed. In these cases, the media, such as a disk drive, must first be rebuilt before data recovery can be attempted. Often, by utilizing technology and specialized techniques, data can be recovered but, in some cases where the drive or device is too damaged, data recovery is impossible.