subject: What Is Data Loss? How To Recover Data From Logical And Physical Corruption [print this page] Data loss is the result of either a logical problem (or system software failure) or a physical problem / mechanical support media (HDD, memory card, CD, DVD, USB ...). In the case of a logical problem, the hardware works but some files are corrupted or inaccessible.
Logical failures are usually less severe for a hard drive as storage media still works but some files or data are unavailable (other types of failures). Failure logic can usually be resolved without intervention in Class 100 Clean room or exchange / repair any component of the disk drive.
There are many causes of failure logic, the main ones:
1. Tables of defective partition / file system corrupted.
2. Formatting the hard drive, deleting files or erasing data.
3. Loss of hard disk partition.
4. Computer virus: corrupt system following a virus attack.
Logical failures are often linked to human error: the user wanted to format a hard drive and made improper handling, files were deleted by mistake a downloaded file contained a virus that has corrupted the file structure, but in all previous examples, the storage medium is not physically damaged.
In many cases, the fault logic can be solved using one of our
Data Recovery software, but for the most severe cases, our experts are at your disposal to solve your problem. We work closely with leading manufacturers of hard disk and we can perform procedures without violating the security of your hard drive.
For physical problems, the material generally does, and the data contained on the media are considered lost. Physical failures are considered the most severe because they are generally characterized by a non-functioning hard drive (as opposed to logical failures). They translate into more specific symptoms:
1. The drive is not recognized by computer.
2. A slamming metal is sometimes heard during operation of the hard disk.
3. The drive vibrates during use.
4. The speed of information transfer is very slow
In the case of physical failure, the data on the storage media are inaccessible due to a mechanical or electronic problem related to one of the many components of the disk drive. This kind of problem is commonly called a "hard disk crash.
Types of physical failures:
Electronic Mechanical Malfunction Failure.
The electric shocks are the main cause of failure of electronic drives. In these cases, integrated circuits (electronic card PCB) hard disk has been damaged during a peak voltage for example.
It is then necessary to change or repair the electronic card the hard drive data recovery.
The hard disk repair and Server Recovery are done in a clean room to ensure optimum success rate.
There are several causes of mechanical failures including:
Crash-heads reading: read heads have damaged the magnetic disk surface, resulting in loss of data.
-Distortion physical disks. Engine-damaged caused a problem of rotational symmetry of the problem discs. A mechanical failure may occur after a shock or a natural disaster or by normal wear and tear of hard disk.
