This article will explain the most common faults that often occur in hard disks , which is vital because we all know that data loss can be fatal.
The purpose is to know how to detect failures and take appropriate action.
The hard drives failures can be classified as:
Simple logical failures
These are failures that are caused by problems of the logical structure, do not affect the operation of the disc, but may affect some applications. For example, accidental deletion of files, such as lost cluster chains causing inconvenience and cross. These failures can still access the hard drive, but for some reason we lost access to some of the saved files. The solution? Overall a user with average knowledge can recover deleted files , even consulting a professional technician is always the most convenient option. Remember that a mistake can be fatal, if in doubt consult before proceeding.
Severe logical problems
In this case we speak of the loss of any of the file allocation tables (cases where both FAT are lost), clearing the boot sector, lost partition table, etc.
An indication to this type of failure is that when you turn the computer sounds like the hard disk is initialized and starts spinning during initial POST routine, the BIOS also fails to detect any problem with the unit or with the interface, but The moment you start looking for the operating system, the computer gives an error message warning you not find the appropriate files.
The solution? In this case you need specialized software, you only need to apply data recovery companies , as they are trained professionals in information retrieval, as they require very delicate handling, and a wrong decision taken could result in total loss of data stored on the disk drive, with all the disadvantages that implies.
Simple physical problems
Here we can mention problems involving physical malfunctioning hard drive, but whose nature could easily fix. These are problems in the power supply, motherboard resistance, faulty controller card (or bad configuration thereof), including discs “glued” (not rotate at boot) or assemblies of heads “stuck “. These anomalies are usually easy to fix (temporarily, while recovering the information on the disc), the positive is that they do not require special tools to fix them.
Serious physical problems
These problems are the most difficult to solve because they involve the failure of a component essential to the correct operation of the computer, for example it may be that no disk motors rotate (or do so at the wrong speed) voice coils that do not work, magnetic heads damaged logic circuits that do not work on the card attached to the disk, and so on.
To correct this, we work directly with the unit, opening the cabinet, separating the control board, so it requires specialized tools, a good assortment of repair parts and technical knowledge of how to perform the substitutions of elements within the hard disk. It is not easy, so if you do not know resorting to a data recovery lab to do their job properly, otherwise an error can be fatal. Worth mentioning that these repairs are expensive, only justified if the data contained in the hard drive is of vital importance.
In short, how to address each of the above situations is different. We will put special care in the first three cases, and severe physical problems are occurring less frequently and require care and training to solve.